Stabiliti Modbus Programming Guide

Transcription

1 Stabiliti Modbus Programming Guide Product Models: 30C & 30C3 Purpose and Scope This document describes the Modbus communication protocol and register set used by the Ideal Power 30 kw Stabiliti Series Power Conversion Systems. Included in this document is information pertaining to all control and status registers, accessible via Modbus RTU and Modbus TCP communication protocols. This document shall be used as a reference manual for the command control and status read-back of Ideal Power ( IPWR ) 30 kw Stabiliti Series Power Conversion Systems ( PCS ). Brief descriptions of each Modbus register, including format, access level, data-type, range, and functionality are included. This document should be used in conjunction with other product documentation provided by IPWR, which is referenced throughout this document. Revision Date Rev Author Notes 1/23/2017 A Chris Perez Initial draft DOC-00038

2 Table of Contents Purpose and Scope... 1 Revision Document information... 4 Product and Firmware... 4 Target Group... 4 Usage Modbus Communication Interface Baud Rate Data Format Device Address Supported Function Codes Message Format Modbus Read Status Query and Response (Function Code 0x03) Modbus Write Control Query and Response (Function Code 0x06) Exception Response Supported Exception Codes PCS Control and Status Registers Specific Fault Registers (0x0000 0x0009) Global Fault Registers (0x000A 0x003F) Port AC1 Control Registers (0x0040 0x005F) Port AC1 Status Registers (0x0060 0x007F) Port DC2 Control Registers (0x0080 0x009F) Port DC2 Status Registers (0x00A0 0x00BF) Port DC3 Control Registers (0x00C0 0x00DF) Port DC3 Status Registers (0x00E0 0x00FF) System Operation Control Registers (0x0100 0x011F) System Operation Status Registers (0x0120 0x013F) Thermal Status Registers (0x0160 0x017F) Diagnostic Control and Status Registers (0x0180 0x01BF) Interconnection Standards Control and Status Registers Low Voltage (LV) Disconnect Control Registers (0x0240 0x025F) High Voltage (HV) Disconnect Control Registers (0x0260 0x027F) Low Frequency (LF) Disconnect Control Registers (0x0280 0x029F) Stabiliti Modbus Programming Guide DOC Rev A 2 of 64

3 5.4 High Frequency (HF) Disconnect Control Registers (0x02A0 0x02BF) System Communication Control Modbus RTU Control Registers Modbus TCP Control Registers System Load-Save Command, Timezone Update, and ID Readback Stabiliti Modbus Programming Guide DOC Rev A 3 of 64

4 1. Document information Product and Firmware This document is valid and applicable for all Stabiliti Series 30 kw PCS released with the following firmware revision: Firmware 3.1 Build 658 Target Group This document is intended for qualified installation and operating personnel with the following skills: Knowledge of Modbus specifications Knowledge of distributed grid resource management Knowledge of all safety information pertaining to Ideal Power PCS systems, PV systems, energy storage systems, and the grid This document assumes familiarity with the network layout and the physical PCS communication connectivity. Usage The Modbus interface and the associated register profile are designed for industrial use and remote control of the PCS. The Modbus interface can be used via TCP (over Ethernet) as well as via RTU (over the RS485 serial port). 2. Modbus Communication Interface The Modbus protocol is an industrial control communication protocol used by many in the solar and energy storage industry. This protocol defines a message structure independent of the type of network over which communication takes place. This protocol describes how a controller (or Modbus server) requests command control information or status information from a device (or Modbus client), how the device responds to the request, and how errors are detected and reported. The following sections describe information pertaining to the Modbus RTU communication interface. 2.1 Baud Rate The supported baud rates for all Modbus RTU communications with the PCS are as follows: bps bps bps bps bps See section 6.1 for information related to Modbus RTU baud rate update over Modbus communications. 2.2 Data Format The supported data formats for all Modbus RTU communications with the PCS are as follows: 1. 8 data bits + 1 even parity bit + 1 stop bit (8-E-1) 2. 8 data bits + 1 odd parity bit + 1 stop bit (8-O-1) 3. 8 data bits + 1 stop bit (8-N-1) Stabiliti Modbus Programming Guide DOC Rev A 4 of 64

5 See section 6.1 for information related to Modbus RTU data format update over Modbus RTU communications. 2.3 Device Address The PCS supports Modbus device addresses in range of The default Modbus device address for Ideal Power PCS systems is set to 240. See section 6.1 for information related to Modbus device address update over Modbus communications. 2.4 Supported Function Codes The PCS Modbus protocol implementation supports the following standard function codes for communication with external instruments: 1. Function Code 0x03 (Read Holding Registers) for reading single or multiple registers 2. Function Code 0x06 (Write Single Holding Register) for writing a single register 3. Message Format This section describes the message formatting details for the PCS Modbus communication protocol. 3.1 Modbus Read Status Query and Response (Function Code 0x03) The format for a Modbus read status query message is shown below. Byte Content Value/Range 1 Device Address 0x00-0xF7 (0-247) IPWR 30C or 30C3 PCS Address 2 Function Code 0x03 Read Holding Registers 3 Starting Address Hi 0x00-0xFF (0-255) MSByte of register address 4 Starting Address Lo 0x00-0xFF (0-255) LSByte of register address 5 Quantity of Registers Hi 0x00-0xFF (0-255) MSByte of number of registers 6 Quantity of Registers Lo 0x00-0xFF (0-255) LSByte of number of registers 7 CRC Hi 0x00-0xFF (0-255) MSByte of CRC 8 CRC Lo 0x00-0xFF (0-255) LSByte of CRC The format for a Modbus read status response message is shown below. Byte Content Value/Range 1 Device Address 0x00-0xF7 (0-247) IPWR 30C or 30C3 PCS Address 2 Function Code 0x03 Read Holding Registers 3 Byte Count 0x00-0xFF (0-255) Num bytes (N) in response 4 Data 1 0x00-0xFF (0-255) Data byte 1 (MSByte of reg 1) 5 Data 2 0x00-0xFF (0-255) Data byte 2 (LSByte of reg 1) N+2 Data N-1 0x00-0xFF (0-255) Data byte N-1 (MSByte of reg N/2) N+3 Data N 0x00-0xFF (0-255) Data byte N (LSByte of reg N/2) N+4 CRC Hi 0x00-0xFF (0-255) MSByte of CRC N+5 CRC Lo 0x00-0xFF (0-255) LSByte of CRC Stabiliti Modbus Programming Guide DOC Rev A 5 of 64

6 3.2 Modbus Write Control Query and Response (Function Code 0x06) The format for a Modbus write control query message is shown below. Byte Content Value/Range 1 Device Address 0x00-0xF7 (0-247) IPWR 30C or 30C3 PCS Address 2 Function Code 0x06 Write Single Holding Register 3 Register Address Hi 0x00-0xFF (0-255) MSByte of register address 4 Register Address Lo 0x00-0xFF (0-255) LSByte of register address 5 Data to Write Hi 0x00-0xFF (0-255) MSByte of data to write 6 Data to Write Lo 0x00-0xFF (0-255) LSByte of data to write 7 CRC Hi 0x00-0xFF (0-255) MSByte of CRC 8 CRC Lo 0x00-0xFF (0-255) LSByte of CRC The format for a Modbus write control response message is shown below. Byte Content Value/Range 1 Device Address 0x00-0xF7 (0-247) IPWR 30C or 30C3 PCS Address 2 Function Code 0x06 Write Single Holding Register 3 Register Address Hi 0x00-0xFF (0-255) MSByte of register address 4 Register Address Lo 0x00-0xFF (0-255) LSByte of register address 5 Data to Write Hi 0x00-0xFF (0-255) MSByte of data to write 6 Data to Write Lo 0x00-0xFF (0-255) LSByte of data to write 7 CRC Hi 0x00-0xFF (0-255) MSByte of CRC 8 CRC Lo 0x00-0xFF (0-255) LSByte of CRC 3.3 Exception Response The format for a Modbus exception response message is shown below. Byte Content Value/Range 1 Device Address 0x00-0xF7 (0-247) IPWR 30C or 30C3 PCS Address 2 Function Code 0x83 or 0x86 MSB set in Function Code 3 Exception Code 0x00-0x04 Supported Exception Code 7 CRC Hi 0x00-0xFF (0-255) MSByte of CRC 8 CRC Lo 0x00-0xFF (0-255) LSByte of CRC 3.4 Supported Exception Codes The PCS Modbus implementation supports the following exception codes: 1. Exception code 0x01 Illegal function 2. Exception code 0x02 Illegal data address 3. Exception code 0x03 Illegal data value 4. Exception code 0x04 Slave device failure Stabiliti Modbus Programming Guide DOC Rev A 6 of 64

7 4. 30C and 30C3 PCS Control and Status Registers This section provides detailed descriptions of the PCS Modbus control and status registers, including register type, format, range, default value, access level, and functionality. Each register description listed here will include the following information: 1. Address Hexadecimal 16-bit value representing Modbus register address 2. Access RW (read-write) or R (read only) 3. Data-type Format of 16-bit value to write or read. IPWR PCS data-types are defined as: a. U16 Unsigned 16-bit integer ( ) b. S16 Signed 16-bit integer ( ) c. HEX Hexadecimal 16-bit value (may indicate bit-specific functionality, or a bit-map) d. POWER Signed 16-bit integer representing power in units of 10W e. VAR Signed 16-bit integer representing re power in units of 10VAR f. VA Signed 16-bit integer representing apparent power in units of 10VA g. PF Signed 16-bit integer representing signed power factor in units of 0.01 h. CURRENT Signed 16-bit integer representing current in units of 0.1A i. VOLTAGE Signed 16-bit integer representing voltage in units of 1V j. FREQ Unsigned 16-bit integer representing frequency in units of 0.001Hz k. TEMP Signed 16-bit integer representing temperature in units of 0.1 C l. RPM Unsigned 16-bit integer representing fan speed in units of 1RPM m. MINUTES Unsigned 16-bit integer representing time-of-day via elapsed minutes from 00:00 (midnight at start of day), e.g. 425 represents 07:05. n. BAUD Unsigned 16-bit integer representing baud rate in units of 100 bps o. STRING 16-bit value representing 2-character ASCII string (consecutive registers of type STRING represent concatenated characters of a string) 4. Range Allowable data range for write access 5. Default Default 16-bit value read back 4.1 Specific Fault Registers (0x0000 0x0009) The following register set provides details pertaining to a single specific PCS fault fault_index Address: 0x0000 (0) Range: 0 63 The fault_index register controls the fault pointer. The value of this pointer register is the fault number for which status information will be populated in fault-specific status registers in address range 0x0001 0x0009. This register can select fault number 0 thru fault number 63 for fault-specific status read-back fault_limit Address: 0x0001 (1) Stabiliti Modbus Programming Guide DOC Rev A 7 of 64

8 The fault_limit register reads the limit used in determining if the fault pointed to is fault_value Address: 0x0002 (2) The fault_value register reads the offending value used in determining if the fault pointed to by fault_index is fault_count Address: 0x0003 (3) The fault_count register reads a count of the number of times the fault pointed to has fault_utime_0 Address: 0x0004 (4) The fault_utime_0 register reads the lower 16-bit word of the UNIX timestamp of the last occurrence of the fault pointed to fault_utime_1 Address: 0x0005 (5) The fault_utime_1 register reads the upper 16-bit word of the UNIX timestamp of the last occurrence of the fault pointed to. Stabiliti Modbus Programming Guide DOC Rev A 8 of 64

9 4.1.7 fault_selector Address: 0x0008 (8) Data-type: HEX The register reads back a bit-map value useful for IPWR diagnosis of the fault pointed to. In several fault instances, there may be multiple sources. This register identifies the source for such faults. Refer to IPWRPCS Fault documentation to interpret the 2-bit value represented by fault_selector. Bit Fault selector [1:0] Bit fault_status Address: 0x0009 (9) Data-type: HEX The register reads back the current status of the fault pointed to. fault_status[4:3] 00 Fault disabled 01 Fault is not and has not since last power-up 10 Fault is 11 Fault is not and has since last power-up fault_status[2:0] 000 INFO: internal informational event 001 ALERT: fault counter incremented only, operation continues 010 ALARM: fault is logged in PCS black-box, operation continues 011 ABORT-0: fault is logged in PCS black-box, operation stops 100 ABORT-1: fault is logged in PCS black-box, operation stops 101 ABORT-2: fault is logged in PCS black-box, operation stops 110 LOCKDOWN: fault is logged in PCS black-box, operation stops, and PCS requires a reset 111 Bit Fault status Fault severity Stabiliti Modbus Programming Guide DOC Rev A 9 of 64

10 Bit Global Fault Registers (0x000A 0x003F) The following register set provides IPWR PCS global fault status, watchdog control, and fault clearing control fault_global_control Address: 0x000C (12) Data-type: HEX Range: 0 1 Default: 0 The fault_global_control register allows user to reset all faults, including all fault counters and timestamps. This register is self-clearing. Bit Fault reset Bit fault 0 Address: 0x0010 (16) Data-type: HEX The fault 0 register indicates the state of faults Bit Fault 7 Fault 6 Fault 5 Fault 4 Fault 3 Fault 2 Fault 1 Bit Fault 15 Fault 14 Fault 13 Fault 12 Fault 11 Fault 10 Fault 9 Fault 0 Fault fault 1 Address: 0x0011 (17) Stabiliti Modbus Programming Guide DOC Rev A 10 of 64

11 Data-type: HEX The fault 1 register indicates the state of faults Bit Fault 23 Fault 22 Fault 21 Fault 20 Fault 19 Fault 18 Fault 17 Bit Fault 31 Fault 30 Fault 29 Fault 28 Fault 27 Fault 26 Fault 25 Fault 16 Fault fault 2 Address: 0x0012 (18) Data-type: HEX The fault 2 register indicates the state of faults Bit Fault 39 Fault 38 Fault 37 Fault 36 Fault 35 Fault 34 Fault 33 Bit Fault 47 Fault 46 Fault 45 Fault 44 Fault 43 Fault 42 Fault 41 Fault 32 Fault fault 3 Address: 0x0013 (19) Data-type: HEX The fault 3 register indicates the state of faults Bit Fault 55 Fault 54 Fault 53 Fault 52 Fault 51 Fault 50 Fault 49 Bit Fault 63 Fault 62 Fault 61 Fault 60 Fault 59 Fault 58 Fault 57 Fault 48 Fault 56 Stabiliti Modbus Programming Guide DOC Rev A 11 of 64

12 4.2.6 fault 0 Address: 0x0018 (24) Data-type: HEX The fault 0 register indicates the state of faults Bit Fault 7 Fault 6 Fault 5 Fault 4 Fault 3 Fault 2 Fault 1 Bit Fault 15 Fault 14 Fault 13 Fault 12 Fault 11 Fault 10 Fault 9 Fault 0 Fault fault 1 Address: 0x0019 (25) Data-type: HEX The fault 1 register indicates the state of faults Bit Fault 23 Fault 22 Fault 21 Fault 20 Fault 19 Fault 18 Fault 17 Bit Fault 31 Fault 30 Fault 29 Fault 28 Fault 27 Fault 26 Fault 25 Fault 16 Fault fault 2 Address: 0x001A (26) Data-type: HEX The fault 2 register indicates the state of faults Bit Fault 39 Fault 38 Fault 37 Fault 36 Fault 35 Fault 34 Fault 33 Fault 32 Stabiliti Modbus Programming Guide DOC Rev A 12 of 64

13 Bit Fault 47 Fault 46 Fault 45 Fault 44 Fault 43 Fault 42 Fault 41 Fault fault 3 Address: 0x001B (27) Data-type: HEX The fault 3 register indicates the state of faults Bit Fault 55 Fault 54 Fault 53 Fault 52 Fault 51 Fault 50 Fault 49 Bit Fault 63 Fault 62 Fault 61 Fault 60 Fault 59 Fault 58 Fault 57 Fault 48 Fault watchdog Address: 0x0028 (40) Data-type: S16 Range: Default: 0 The user watchdog register is disabled when 0 is written, and enabled when a value in range is written. Once enabled, the watchdog register decrements by 1 every second, until expiring at the transition from 0 to -1. Once expired, the PCS issues an ABORT-2 fault which halts power conversion and logs all fault information. 4.3 Port AC1 Control Registers (0x0040 0x005F) The following register set provides command control for the PCS port AC p1_control_method Address: 0x0041 (65) Data-type: HEX Default: 0x0000 The p1_control_method register defines the AC1 port power conversion method. Allowable values for this port are: 1. 0x0000 IDLE: AC1 port is off Stabiliti Modbus Programming Guide DOC Rev A 13 of 64

14 2. 0x0001 NET: AC1 port set as NET port (maintains energy conservation for system). Used only in AC grid-following application. 3. 0x0402 GPWR: AC1 port set for constant real power control. Used only in AC grid-following application. 4. 0x0502 FPWR: AC1 port set for facility power. Used for microgrid/off-grid applications, as well as applications requiring seamless transition from off-grid to grid-following applications p1_power_ramp_rate Address: 0x0042 (66) Data-type: POWER Range: (10W/sec 80kW/sec) Default: 250 (2.5kW/sec) The p1_power_ramp_rate register defines the normal-operations power ramp rate used in GPWR constant real power control and in NET control. This register is set in units of 10W/sec, e.g. a setting of 500 results in GPWR control ramping real power to the specified setpoint at a rate of 5kW/sec. This ramp rate is used for both normal power transitions (going from one setpoint to another), as well as for startup ramp-up p1_throttle_port Address: 0x0043 (67) Data-type: HEX Range: 0 1 Default: 0x0000 The p1_throttle_port register defines the port to throttle back power on once the soft-power or soft-current limit is reached on the AC1 port in NET control. p1_throttle_port[0] 0 Throttle back on DC3 port if DC3 is ; if DC3 is in, throttle back on DC2 port. 1 Throttle back on DC2 port if DC2 is ; if DC2 is in, throttle back on DC3 port. Bit Bit Throttle port p1_real_pwr_setpt Address: 0x0044 (68) Data-type: POWER Range: (-32kW 32kW) Stabiliti Modbus Programming Guide DOC Rev A 14 of 64

15 Default: 0 The p1_real_pwr_setpt defines the real power setpoint when AC1 is set for the following power control methods: 1. FPWR 1 2. GPWR This register is ignored if AC1 is set for NET power control. The register is set in units of 10W p1_react_pwr_setpt Address: 0x0045 (69) Data-type: VAR Range: (-21.5kVAR 21.5kVAR) Default: 0 The p1_react_pwr_setpt defines the re power setpoint when AC1 is set for the following power control methods: 1. FPWR 1 2. GPWR This register is ignored if AC1 is set for NET power control. The register is set in units of 10VAR p1_power_factor_setpt Address: 0x0046 (70) Data-type: S16 Range: Default: 100 The p1_power_factor_setpt defines the power factor setpoint when AC1 is set to be the NET power control port. The register is set in units of The value entered in this register determines the effective signed power factor to control by the following equation: x 200, 150 > x > 100 pf(x) = { x, 50 < x < 100 For example, if p1_power_factor_setpt is set to 125, the PCS will set the observed power factor to If the p1_power_factor register is set to 80, the PCS will set the observed power factor p1_voltage_setpt Address: 0x0047 (71) Range: Default: If AC1 is set to FPWR control, registers p1_real_pwr_setpt and p1_react_pwr_setpt will take effect on utility grid presence. Stabiliti Modbus Programming Guide DOC Rev A 15 of 64

16 The p1_voltage_setpt defines the microgrid RMS voltage (line-line) setpoint when AC1 is set to FPWR control. This register is ignored if AC1 is set to NET control or GPWR control, or if the utility grid is present when in FPWR control. The register is set in units of 1V p1_frequency_setpt Address: 0x0048 (72) Data-type: FREQ Range: Default: The p1_frequency_setpt defines the microgrid frequency setpoint when AC1 is set to FPWR control. This register is ignored if AC1 is set to NET control or GPWR control, or if the utility grid is present when in FPWR control. The register is set in units of 0.001Hz p1_re_ctrl Address: 0x004A (74) Data-type: HEX Range: 0 1 Default: 0 The p1_re_ctrl register enables or disables AC1 re power control. p1_re_ctrl[0] 0 Re power control is disabled. 1 Re power control is enabled (GPWR control of constant re power, or NET control of power factor) Bit Bit Re control enabled p1_react_power_limit Address: 0x0058 (88) Data-type: VAR Range: (0 21.5kVAR) Default: 1500 (15kVAR) The p1_react_power_limit defines the re power soft limit for the AC1 port. The register defines the limit for re power generation or absorption at the AC1 port during power conversion. The register is set in units of 10VAR. Stabiliti Modbus Programming Guide DOC Rev A 16 of 64

17 p1_real_power_limit Address: 0x0059 (89) Data-type: POWER Range: (0 32kW) Default: 3200 (32kW) The p1_real_power_limit defines the real power soft limit for the AC1 port. The register defines the limit for real power generation or loading at the AC1 port during power conversion. The register is set in units of 10W p1_current_limit Address: 0x005A (90) Data-type: CURRENT Range: (0 44A) Default: 400 (40A) The p1_current_limit defines the current soft limit for the AC1 port. The register defines the limit for the AC line currents at the AC1 port during power conversion. The register is set in units of 0.1A. 4.4 Port AC1 Status Registers (0x0060 0x007F) The following register set provides status read-back for the PCS port AC p1_port_status Address: 0x0060 (96) Data-type: HEX The p1_port_status register reads back the status of the AC1 port. p1_port_status[0] AC1 port is real power soft-limiting p1_port_status[1] AC1 port is current soft-limiting p1_port_status[2] AC1 port is re power soft-limiting p1_port_status[3] AC1 port is power derated (limited) due to high temperature p1_port_status[4] p1_port_status[5] AC1 port is throttling back on port DC2 due to soft-limiting p1_port_status[6] p1_port_status[7] AC1 port is throttling back on port DC3 due to soft-limiting p1_port_status[8] AC1 port has the seamless transfer feature enabled when in FPWR control p1_port_status[9] The PCS SEL-547 interface transfer switch HW is indicating the PCS is islanded (islanding contactor is commanded to open). If enabled, the PCS is able to form a microgrid in FPWR control. Stabiliti Modbus Programming Guide DOC Rev A 17 of 64

18 p1_port_status[10] The PCS SEL-547 interface transfer switch HW is indicating the PCS is islanded (islanding contactor has successfully opened). If enabled, the PCS is able to form a microgrid in FPWR control. Bit Throttling DC3 Throttling DC2 Power derating for thermal Re power limiting Current limiting Bit p1_real_pwr_ramped Address: 0x0064 (100) Data-type: POWER PCS islanded (ACK) PCS islanded Real power limiting The p1_real_pwr_ramped reads back the ramping control point for real power when the PCS is performing power conversion and the AC1 port is set for GPWR or FPWR 2 control. The register is read back in units of 10W p1_re_pwr_ramped Address: 0x0065 (101) Data-type: VAR The p1_re_pwr_ramped reads back the ramping control point for re power when the PCS is performing power conversion and the AC1 port is set for GPWR or FPWR 2. The register is read back in units of 10VAR p1_frequency Address: 0x0069 (105) Data-type: FREQ The p1_frequency register reads back the AC1 port frequency. This register is read back in units of 0.001Hz. Seamless enabled 2 Constant real power control enabled for FPWR only when PCS is grid-following (AC grid is present). Stabiliti Modbus Programming Guide DOC Rev A 18 of 64

19 4.4.5 p1_v_ab_rms Address: 0x006D (109) The p1_v_ab_rms register reads back the AC1 port phase A-phase B (line-line) RMS voltage. This register is read back in units of 1V p1_v_bc_rms Address: 0x006E (110) The p1_v_bc_rms register reads back the AC1 port phase B-phase C (line-line) RMS voltage. This register is read back in units of 1V p1_v_ca_rms Address: 0x006F (111) The p1_v_ca_rms register reads back the AC1 port phase C-phase A (line-line) RMS voltage. This register is read back in units of 1V p1_v_an_rms Address: 0x0070 (112) The p1_v_an_rms register reads back the AC1 port phase A (line-neutral) RMS voltage. This register is read back in units of 1V p1_v_bn_rms Address: 0x0071 (113) Stabiliti Modbus Programming Guide DOC Rev A 19 of 64

20 The p1_v_bn_rms register reads back the AC1 port phase B (line-neutral) RMS voltage. This register is read back in units of 1V p1_v_cn_rms Address: 0x0072 (114) The p1_v_cn_rms register reads back the AC1 port phase C (line-neutral) RMS voltage. This register is read back in units of 1V p1_power_factor Address: 0x0076 (118) Data-type: PF The p1_power_factor register reads back the AC1 port power factor. This register is read back in units of 0.01, and will read back a value in the range -99 to +100, corresponding to to p1_real_power Address: 0x0077 (119) Data-type: POWER The p1_real_power register reads back the AC1 port real power. This register is read back in units of 10W. For this register, a positive value read-back indicates AC1 port is generating (sourcing) real power, while a negative value read-back indicates AC1 port is loading (sinking) real power p1_re_power Address: 0x0078 (120) Data-type: VAR Stabiliti Modbus Programming Guide DOC Rev A 20 of 64

21 The p1_re_power register reads back the AC1 port re power. This register is read back in units of 10VAR. For this register, a positive value read-back indicates AC1 port is generating (sourcing) re power, while a negative value read-back indicates AC1 port is absorbing (sinking) re power p1_apparent_power Address: 0x0079 (121) Data-type: VA The p1_apparent_power register reads back the AC1 port apparent power. This register is read back in units of 10VA. This register is signed internally to match the direction of real power flow, i.e. shown as a positive number if exporting real power, and shown as a negative number if importing real power p1_i_a_int_rms Address: 0x007A (122) Data-type: CURRENT The p1_i_a_int_rms register reads back the AC1 port phase A RMS current internal to the PCS. This current does not include the contribution from the AC1 port line capacitance. This register is read back in units of 0.1A p1_i_b_int_rms Address: 0x007B (123) Data-type: CURRENT The p1_i_b_int_rms register reads back the AC1 port phase B RMS current internal to the PCS. This current does not include the contribution from the AC1 port line capacitance. This register is read back in units of 0.1A p1_i_c_int_rms Address: 0x007C (124) Data-type: CURRENT Stabiliti Modbus Programming Guide DOC Rev A 21 of 64

22 The p1_i_c_int_rms register reads back the AC1 port phase C RMS current internal to the PCS. This current does not include the contribution from the AC1 port line capacitance. This register is read back in units of 0.1A p1_i_a_ext_rms Address: 0x007D (125) Data-type: CURRENT The p1_i_a_ext_rms register reads back the AC1 port phase A RMS current. This is the RMS current observed at the AC connect terminals. This register is read back in units of 0.1A p1_i_b_ext_rms Address: 0x007E (126) Data-type: CURRENT The p1_i_b_ext_rms register reads back the AC1 port phase B RMS current. This is the RMS current observed at the AC connect terminals. This register is read back in units of 0.1A p1_i_c_ext_rms Address: 0x007F (127) Data-type: CURRENT The p1_i_c_ext_rms register reads back the AC1 port phase C RMS current. This is the RMS current observed at the AC connect terminals. This register is read back in units of 0.1A. 4.5 Port DC2 Control Registers (0x0080 0x009F) The following register set provides command control for the PCS port DC p2_control_method Address: 0x0081 (129) Data-type: HEX Default: 0x0000 Stabiliti Modbus Programming Guide DOC Rev A 22 of 64

23 The p2_control_method register defines the DC2 port power conversion method. Allowable values for this port are: 1. 0x0000 IDLE: DC2 port is off 2. 0x0001 NET: DC2 port set as NET port (maintains energy conservation for system). 3. 0x0002 PV/MPPT: DC2 port set for MPPT control for PV applications. 4. 0x0301 CURR: DC2 port set for constant current control. 5. 0x0401 PWR: DC2 port set for constant power control. 6. 0x0501 VOLT: DC2 port set for constant voltage control p2_throttle_port Address: 0x0083 (131) Data-type: HEX Range: 0 1 Default: 0x0000 The p2_throttle_port register defines the port to throttle back power on once the soft-power or soft-current limit is reached on the DC2 port in NET control. p2_throttle_port[0] 0 Throttle back on DC3 port if DC3 is ; if DC3 is in, throttle back on AC1 port. 1 Throttle back on AC1 port if AC1 is ; if AC1 is in, throttle back on DC3 port. Bit Bit Throttle port p2_current_setpt Address: 0x0084 (132) Data-type: CURRENT Range: (-62A 62A) Default: 0 The p2_current_setpt register defines the DC2 current setpoint when DC2 is set for constant current control. This register is ignored if DC2 is set for any other control method. The register is set in units of 0.1A p2_power_setpt Address: 0x0085 (133) Data-type: POWER Range: (-32kW 32kW) Stabiliti Modbus Programming Guide DOC Rev A 23 of 64

24 Default: 0 The p2_power_setpt register defines the DC2 power setpoint when DC2 is set for constant power control. The register is set in units of 10W p2_voltage_setpt Address: 0x0086 (134) Range: Default: 0 The p2_voltage_setpt register defines the voltage setpoint when DC2 is set for constant voltage control. The register is set in units of 1V p2_pv_start_tod_setpt Address: 0x0087 (135) Data-type: MINUTES Range: (00:00 24:00) Default: 0 The p2_pv_start_tod_setpt register defines the time-of-day to start power conversion operations for DC2 if the DC2 control method is set for PV/MPPT. If the PCS is set for auto-control mode, and DC2 is set for PV/MPPT, the PCS will attempt to start tracking to the PV maximum power point at the time-of-day specified by register p2_pv_start_tod_setpt. The register is in units of elapsed minutes from 00:00, or midnight start-of-day p2_pv_stop_tod_setpt Address: 0x0088 (136) Data-type: MINUTES Range: (00:00 24:00) Default: 1440 The p2_pv_stop_tod_setpt register defines the time-of-day to stop power conversion operations for DC2 if the DC2 control method is set for PV/MPPT. If the PCS is set for auto-control mode, and DC2 is set for PV/MPPT, the PCS will stop tracking to the PV maximum power point at the time-of-day specified by register p2_pv_stop_tod_setpt. The register is in units of elapsed minutes from 00:00, or midnight startof-day p2_pv_restart_setpt Address: 0x0089 (137) Stabiliti Modbus Programming Guide DOC Rev A 24 of 64

25 Range: Default: 20 The p2_pv_restart_setpt register defines the setting for the PV/MPPT restart counter in seconds. The function of this restart counter is to hold off power conversion re-start for a specified duration if the PV voltage drops below the limit set by register p2_pv_min_v_setpt. The register is in units of seconds p2_pv_min_v_setpt Address: 0x008A (138) Range: Default: 100 The p2_pv_min_v_setpt register defines the lower limit for the PV/MPPT voltage. If the DC2 PV voltage drops below this limit, the restart function stops PV power conversion for the specified duration set by register p2_pv_restart_setpt. When the restart counter expires, the DC2 PV port will attempt to restart power conversion if the voltage is above register p2_pv_min_v_setpt. The register is in units of 1V p2_v_pn_max_limit Address: 0x008D (141) Range: Default: 1050 The p2_v_pn_max_limit voltage register defines the upper limit for the DC2 port. If the DC2 voltage rises above this limit, the DC over-voltage fault is set, the PCS stops power conversion. The register is set in units of 1V p2_v_pn_min_limit Address: 0x008E (142) Range: Default: 100 The p2_v_pn_min_limit voltage register defines the lower limit for the DC2 port. If the DC2 voltage drops below this limit, the DC under-voltage fault is set, the PCS stops power conversion. The register is set in units of 1V p2_current_ramp_rate Address: 0x008F (143) Data-type: CURRENT Stabiliti Modbus Programming Guide DOC Rev A 25 of 64

26 Range: (0.1A/sec 2500A/sec) Default: 50 (5A/sec) The p2_current_ramp_rate register defines the current ramp rate used for DC2 constant current control. This register is set in units of 0.1A/sec, e.g. a setting of 500 results in DC2 controls ramping current up or down to the specified setpoint at a rate of 50A/sec p2_power_ramp_rate Address: 0x0090 (144) Data-type: POWER Range: (10W/sec 250kW/sec) Default: 250 (2.5kW/sec) The p2_power_ramp_rate register defines the power ramp rate used for DC2 constant power control. This register is set in units of 10W/sec, e.g. a setting of 500 results in DC2 controls ramping power up or down to the specified setpoint at a rate of 5kW/sec p2_voltage_ramp_rate Address: 0x0091 (145) Range: (1V/sec 1000V/sec) Default: 50 (50V/sec) The p2_voltage_ramp_rate register defines the voltage ramp rate used for DC2 constant voltage control. This register is set in units of 1V/sec, e.g. a setting of 200 results in DC2 controls ramping voltage up or down to the specified setpoint at a rate of 200V/sec p2_power_limit Address: 0x0099 (153) Data-type: POWER Range: (0 32kW) Default: 3200 (32kW) The p2_power_limit defines the power soft limit for the DC2 port. The register defines the limit for power generation or loading at the DC2 port during power conversion. The register is set in units of 10W p2_current_limit Address: 0x009A (154) Data-type: CURRENT Range: (0 64A) Default: 600 (60A) Stabiliti Modbus Programming Guide DOC Rev A 26 of 64

27 The p2_current_limit defines the current soft limit for the DC2 port. The register defines the limit for the DC current at the DC2 port during power conversion. The register is set in units of 0.1A. 4.6 Port DC2 Status Registers (0x00A0 0x00BF) The following register set provides status read-back for the PCS port DC p2_port_status Address: 0x00A0 (160) Data-type: HEX The p2_port_status register reads back the status of the DC2 port. p2_port_status[0] DC2 port is power soft-limiting p2_port_status[1] DC2 port is current soft-limiting p2_port_status[2] p2_port_status[3] DC2 port is power derated (limited) due to high temperature p2_port_status[4] p2_port_status[5] DC2 port is throttling back on port AC1 due to soft-limiting p2_port_status[6] p2_port_status[7] DC2 port is throttling back on port DC3 due to soft-limiting Bit Throttling DC3 Throttling AC1 Power derating for thermal Current limiting Bit Power limiting p2_current_ramped Address: 0x00A4 (164) Data-type: CURRENT The p2_current_ramped reads back the ramping control point for current when the PCS is performing power conversion and the DC2 port is set for constant current control. The register is read back in units of 0.1A p2_power_ramped Address: 0x00A5 (165) Stabiliti Modbus Programming Guide DOC Rev A 27 of 64

28 Data-type: POWER The p2_power_ramped reads back the ramping control point for power when the PCS is performing power conversion and the DC2 port is set for constant power control. The register is read back in units of 10W p2_voltage_ramped Address: 0x00A6 (166) The p2_voltage_ramped register reads back the ramping control point for voltage when the PCS is performing power conversion and the DC2 port is set for constant voltage control. This register is read back in units of 1V pv_tod_stat Address: 0x00A7 (167) Data-type: MINUTES The pv_tod_stat register reads back the current time-of-day represented in elapsed minutes from 00:00 (midnight start-of-day) p2_pv_restart_stat Address: 0x00A8 (168) The p2_pv_restart_stat register reads back the current value of the restart counter when the restart function is in use for PV/MPPT operation at the DC2 port. This register is in units of 1 second p2_v_pn Address: 0x00AD (173) Stabiliti Modbus Programming Guide DOC Rev A 28 of 64

29 The p2_v_pn register reads back the DC2 port voltage. This register is read back in units of 1V p2_v_pg Address: 0x00B0 (176) The p2_v_pg register reads back the DC2 port terminal voltage with respect to earth ground. This register is read back in units of 1V dc_com_voltage Address: 0x00B1 (177) The dc_com_voltage register reads back the DC-COM terminal voltage with respect to earth ground. This register is read back in units of 1V p2_power Address: 0x00B9 (185) Data-type: POWER The p2_power register reads back the DC2 port power. This register is read back in units of 10W p2_current Address: 0x00BA (186) Data-type: CURRENT The p2_current register reads back the DC2 port current. This register is read back in units of 0.1A. 4.7 Port DC3 Control Registers (0x00C0 0x00DF) The following register set provides command control for the PCS port DC3. Stabiliti Modbus Programming Guide DOC Rev A 29 of 64

30 4.7.1 p3_control_method Address: 0x00C1 (193) Data-type: HEX Default: 0x0000 The p3_control_method register defines the DC3 port power conversion method. Allowable values for this port are: 1. 0x0000 IDLE: DC3 port is off 2. 0x0001 NET: DC3 port set as NET port (maintains energy conservation for system). 3. 0x0002 PV/MPPT: DC3 port set for MPPT control for PV applications. 4. 0x0301 CURR: DC3 port set for constant current control. 5. 0x0401 PWR: DC3 port set for constant power control. 6. 0x0501 VOLT: DC3 port set for constant voltage control p3_throttle_port Address: 0x00C3 (195) Data-type: HEX Range: 0 1 Default: 0x0000 The p3_throttle_port register defines the port to throttle back power on once the soft-power or soft-current limit is reached on the DC3 port in NET control. p3_throttle_port[0] 0 Throttle back on DC2 port if DC2 is ; if DC2 is in, throttle back on AC1 port. 1 Throttle back on AC1 port if AC1 is ; if AC1 is in, throttle back on DC2 port. Bit Bit Throttle port p3_current_setpt Address: 0x00C4 (196) Data-type: CURRENT Range: (-62A 62A) Default: 0 Stabiliti Modbus Programming Guide DOC Rev A 30 of 64

31 The p3_current_setpt register defines the DC3 current setpoint when DC3 is set for constant current control. This register is ignored if DC3 is set for any other control method. The register is set in units of 0.1A p3_power_setpt Address: 0x00C5 (197) Data-type: POWER Range: (-32kW 32kW) Default: 0 The p3_power_setpt register defines the DC3 power setpoint when DC3 is set for constant power control. The register is set in units of 10W p3_voltage_setpt Address: 0x00C6 (198) Range: Default: 0 The p3_voltage_setpt register defines the voltage setpoint when DC3 is set for constant voltage control. The register is set in units of 1V p3_pv_start_tod_setpt Address: 0x00C7 (199) Data-type: MINUTES Range: (00:00 24:00) Default: 0 The p3_pv_start_tod_setpt register defines the time-of-day to start power conversion operations for DC3 if the DC3 control method is set for PV/MPPT. If the PCS is set for auto-control mode, and DC3 is set for PV/MPPT, the PCS will attempt to start tracking to the PV maximum power point at the time-of-day specified by register p3_pv_start_tod_setpt. The register is in units of elapsed minutes from 00:00, or midnight start-of-day p3_pv_stop_tod_setpt Address: 0x00C8 (200) Data-type: MINUTES Range: (00:00 24:00) Default: 1440 Stabiliti Modbus Programming Guide DOC Rev A 31 of 64

32 The p3_pv_stop_tod_setpt register defines the time-of-day to stop power conversion operations for DC3 if the DC3 control method is set for PV/MPPT. If the PCS is set for auto-control mode, and DC3 is set for PV/MPPT, the PCS will stop tracking to the PV maximum power point at the time-of-day specified by register p3_pv_stop_tod_setpt. The register is in units of elapsed minutes from 00:00, or midnight startof-day p3_pv_restart_setpt Address: 0x00C9 (201) Range: Default: 20 The p3_pv_restart_setpt register defines the setting for the PV/MPPT restart counter in seconds. The function of this restart counter is to hold off power conversion re-start for a specified duration if the PV voltage drops below the limit set by register p3_pv_min_v_setpt. The register is in units of seconds p3_pv_min_v_setpt Address: 0x00CA (202) Range: Default: 100 The p3_pv_min_v_setpt register defines the lower limit for the PV/MPPT voltage. If the DC3 PV voltage drops below this limit, the restart function stops PV power conversion for the specified duration set by register p3_pv_restart_setpt. When the restart counter expires, the DC3 PV port will attempt to restart power conversion if the voltage is above register p3_pv_min_v_setpt. The register is in units of 1V p3_v_pn_max_limit Address: 0x00CD (205) Range: Default: 1050 The p3_v_pn_max_limit voltage register defines the upper limit for the DC3 port. If the DC3 voltage rises above this limit, the DC over-voltage fault is set, the PCS stops power conversion. The register is set in units of 1V p3_v_pn_min_limit Address: 0x00CE (206) Range: Stabiliti Modbus Programming Guide DOC Rev A 32 of 64

33 Default: 100 The p3_v_pn_min_limit voltage register defines the lower limit for the DC3 port. If the DC3 voltage drops below this limit, the DC under-voltage fault is set, the PCS stops power conversion. The register is set in units of 1V p3_current_ramp_rate Address: 0x00CF (207) Data-type: CURRENT Range: (0.1A/sec 2500A/sec) Default: 50 (5A/sec) The p3_current_ramp_rate register defines the current ramp rate used for DC3 constant current control. This register is set in units of 0.1A/sec, e.g. a setting of 500 results in DC3 controls ramping current up or down to the specified setpoint at a rate of 50A/sec p3_power_ramp_rate Address: 0x00D0 (208) Data-type: POWER Range: (10W/sec 250kW/sec) Default: 250 (2.5kW/sec) The p3_power_ramp_rate register defines the power ramp rate used for DC3 constant power control. This register is set in units of 10W/sec, e.g. a setting of 500 results in DC3 controls ramping power up or down to the specified setpoint at a rate of 5kW/sec p3_voltage_ramp_rate Address: 0x00D1 (209) Range: (1V/sec 1000V/sec) Default: 50 (50V/sec) The p3_voltage_ramp_rate register defines the voltage ramp rate used for DC3 constant voltage control. This register is set in units of 1V/sec, e.g. a setting of 200 results in DC3 controls ramping voltage up or down to the specified setpoint at a rate of 200V/sec p3_power_limit Address: 0x00D9 (217) Data-type: POWER Range: (0 32kW) Default: 3200 (32kW) Stabiliti Modbus Programming Guide DOC Rev A 33 of 64

34 The p3_power_limit defines the power soft limit for the DC3 port. The register defines the limit for power generation or loading at the DC3 port during power conversion. The register is set in units of 10W p3_current_limit Address: 0x00DA (218) Data-type: CURRENT Range: (0 64A) Default: 600 (60A) The p3_current_limit defines the current soft limit for the DC3 port. The register defines the limit for the DC current at the DC3 port during power conversion. The register is set in units of 0.1A. 4.8 Port DC3 Status Registers (0x00E0 0x00FF) The following register set provides status read-back for the PCS port DC p3_port_status Address: 0x00E0 (224) Data-type: HEX The p3_port_status register reads back the status of the DC3 port. p3_port_status[0] DC3 port is power soft-limiting p3_port_status[1] DC3 port is current soft-limiting p3_port_status[2] p3_port_status[3] DC3 port is power derated (limited) due to high temperature p3_port_status[4] p3_port_status[5] DC3 port is throttling back on port AC1 due to soft-limiting p3_port_status[6] p3_port_status[7] DC3 port is throttling back on port DC2 due to soft-limiting Bit Throttling DC2 Throttling AC1 Power derating for thermal Current limiting Bit Power limiting p3_current_ramped Address: 0x00E4 (228) Stabiliti Modbus Programming Guide DOC Rev A 34 of 64

35 Data-type: CURRENT The p3_current_ramped reads back the ramping control point for current when the PCS is performing power conversion and the DC3 port is set for constant current control. The register is read back in units of 0.1A p3_power_ramped Address: 0x00E5 (229) Data-type: POWER The p3_power_ramped reads back the ramping control point for power when the PCS is performing power conversion and the DC3 port is set for constant power control. The register is read back in units of 10W p3_voltage_ramped Address: 0x00E6 (230) The p3_voltage_ramped register reads back the ramping control point for voltage when the PCS is performing power conversion and the DC3 port is set for constant voltage control. This register is read back in units of 1V p3_pv_restart_stat Address: 0x00E8 (232) The p3_pv_restart_stat register reads back the current value of the restart counter when the restart function is in use for PV/MPPT operation at the DC3 port. This register is in units of 1 second p3_v_pn Address: 0x00ED (237) Stabiliti Modbus Programming Guide DOC Rev A 35 of 64

36 The p3_v_pn register reads back the DC3 port voltage. This register is read back in units of 1V p3_v_pg Address: 0x00F0 (240) The p3_v_pg register reads back the DC3 port terminal voltage with respect to earth ground. This register is read back in units of 1V p3_power Address: 0x00F9 (249) Data-type: POWER The p3_power register reads back the DC3 port power. This register is read back in units of 10W p3_current Address: 0x00FA (250) Data-type: CURRENT The p3_current register reads back the DC3 port current. This register is read back in units of 0.1A. 4.9 System Operation Control Registers (0x0100 0x011F) The following register set provides system operational control for the PCS reconnect_timer_set_0 Address: 0x0100 (256) Default: 320 The reconnect_timer_set_0 register defines soft reconnect time after a disconnect triggered by a fault of severity level ABORT-0. This soft reconnect time is only used when the PCS in auto-control mode following an ABORT-0 fault clearance. This register is in units of 1 second. Stabiliti Modbus Programming Guide DOC Rev A 36 of 64

37 4.9.2 reconnect_timer_set_1 Address: 0x0101 (257) Default: 20 The reconnect_timer_set_1 register defines soft reconnect time after a disconnect triggered by a fault of severity level ABORT-1. This soft reconnect time is only used when the PCS in auto-control mode following an ABORT-1 fault clearance. This register is in units of 1 second reconnect_timer_set_2 Address: 0x0102 (258) Default: 20 The reconnect_timer_set_2 register defines soft reconnect time after a disconnect triggered by a fault of severity level ABORT-2. This soft reconnect time is only used when the PCS in auto-control mode following an ABORT-2 fault clearance timestamp_sec_set_0 Address: 0x0104 (260) Data-type: HEX4 Default: 0x0000 The timestamp_sec_set_0 register sets the lower 16-bits of the UNIX timestamp to be set for the PCS system. This timestamp will not take effect until register timestamp_update at address 0x0106 (262) is set timestamp_sec_set_1 Address: 0x0105 (261) Data-type: HEX4 Default: 0x0000 The timestamp_sec_set_1 register sets the upper 16-bits of the UNIX timestamp to be set for the PCS system. This timestamp will not take effect until register timestamp_update at address 0x0106 (262) is set. Stabiliti Modbus Programming Guide DOC Rev A 37 of 64

38 4.9.6 timestamp_update Address: 0x0106 (262) Data-type: HEX4 Default: 0x0000 The timestamp_update register latches the current settings for timestamp_sec_set_1 and timestamp_sec_set_0, representing a 32-bit UNIX timestamp to be programmed into the PCS, and programs the PCS system time to this timestamp. This register is self-clearing. timestamp_update[0] 1 Set new timestamp Bit Bit Update timestamp user_start Address: 0x0107 (263) Data-type: HEX4 Default: 0x0000 The user_start register starts power conversion when set. This register is used when the PCS is set for manual-mode system operation, and is ignored in auto-mode operations. This register is self-clearing. user_start[0] 1 Start power conversion Bit Bit Start power conversion user_stop Address: 0x0108 (264) Data-type: HEX4 Default: 0x0000 Stabiliti Modbus Programming Guide DOC Rev A 38 of 64

39 The user_stop register stops power conversion when set. This register is used when the PCS is set for manual-mode system operation, and is ignored in auto-mode operations. This register is self-clearing. user_stop[0] 1 Stop power conversion Bit Bit Stop power conversion remote_reset Address: 0x010A (266) Data-type: HEX4 Default: 0x0000 The remote_reset register performs a PCS system reset when set. System power-up or reset put the PCS system through the following steps: 1. Boot of PCS communications processor 2. Communications initialization 3. Boot of PCS power control processor 4. Load of PCS power control register set 5. Power-up self-test routines This register is used in both manual-mode and auto-mode operations. This register is self-clearing. remote_reset[15] 1 Perform system reset Bit Bit Perform remote reset system_op_mode Address: 0x010B (267) Data-type: HEX4 Default: 0x0000 Stabiliti Modbus Programming Guide DOC Rev A 39 of 64