PM210v Multi-Function Panel Meter. Modbus Reference. DAE Instrument Corp.

Transcription

1 DAE Instrument Corp. v Multi- Panel Meter Modbus Reference Revision 2.6.1e Updated 2015/1/22 Prepared By: David Ling Firmware: v312

2 Table of Contents General Information! 3 Register Tables! 4 Real Time Data (One Word Sized)! 4 Real Time Data (Two Word Sized)! 5 Utility Energy Data! 6 Generator Energy Data! 7 Setup Data! 8 DO Control! 9 Examples! 10 Read Phase Voltage! 10 Read Phase Current! 10 Read Power! 11 Read Frequency! 11 Read Power Factor! 12 Read Total Active Energy (kwh)! 12 Write Total kwh! 13 Read DO Status! 13 Control DO! 14 Read Phase/Wire! 15 Read BD15 (15 minute block demand)! 15 Read Device! 16 Write Device! 17 Read Baud Rate! 18 Write Baud Rate! 18 Read PT Ratio! 19 Write PT Ratio! 19 Modbus Reference 2.6.1e! 1/25

3 Read CT Ratio! 20 Write CT Ratio! 20 Read Standard/Dedicated CT! 21 Write Standard/Dedicated CT! 21 Read Temperature! 22 Read Firmware Version! 22 Computation! 23 Definition! 23 Usage! 23 Notes on Modscan! 24 Additional Resources! 25 Modbus Reference 2.6.1e! 2/25

4 General Information General Information The communicates using the Modbus/RTU protocol. The communications interface is RS485. The default baud rate is The data format is 8 bits, no parity, 1 stop bit. The default address of the can either be zero, one or the same as the last 2 digits of the serial number, except 00 which resolves to 100. The actual device address can be found through the front panel by entering the settings mode. All numerical data is in integer form and must be scaled by multiplying/dividing with its indicated unit to get the final data value. Reading is done through function code 3. Most writing is done using function code 16. All numerical values are in decimal unless otherwise specified or appended with an ʻhʼ, in which case the data is in hexadecimal. Control is done using function code 5. The uses the address 255 instead of zero as the broadcast address. The default address is the serial number last 2 digits or 100 when it is 00. It is possible that the defaults have been changed from the original factory settings. To find out the address and baud rate, enter the settings mode through the front panel controls. To find out the same information through Modbus, query using the broadcast address 255, but make sure that only the given is connected to the host PC, no other devices must be on the same bus network. When a command is in error, the will not respond and simply allow the host PC doing the reading to time out. The should have a maximum latency of 300 milliseconds, this is the guaranteed time in which the should respond, if this time is exceeded, the host PC should issue a time out. A command is in error in any of these conditions: 1. The function code is not supported. 2. The data is malformed or out of range. 3. The is wrong. This version of the Modbus registers apply to with versions 312 and up. Note especially the accumulated energy registers at locations 48~51, these are writable in this version, but in older versions, it may be writable only at locations 86~87 and 94~95. Modbus Reference 2.6.1e! 3/25

5 Register Tables Register Tables Real Time Data (One Word Sized) The data in this table is mostly the same data that can be found in the table for the Two Word Sized Real Time Data, but is only one word in size and is thus less precise. This table remains for backwards compatibility with older models. This table can also be used as short form table of the most relevant data and is provided for convenience when the entire table is desired to be read as one block. For more comprehensive data, use the two word sized real time data table. Register Modscan Parameter Range Scale Unit Read/ Write Applies To 0 03:0001 Phase A Voltage (VA) 1 03:0002 Phase B Voltage (VB) 2 03:0003 Phase C Voltage (VC) 0~65535, no PT factor 0.1 V R 3p3w/ 3 03:0004 Line A-B Voltage (VAB) 4 03:0005 Line B-C Voltage (VBC) 5 03:0006 Line C-A Voltage (VCA) 0~65535, no PT factor 0.1 V R 3p3w/ 6 03:0007 Phase A Current (IA) 7 03:0008 Phase B Current (IB) 8 03:0009 Phase C Current (IC) 0~65535, no CT factor A R 3p3w/ 9 03:0010 Total Active Power (P) 10 03:0011 Total Reactive Power (Q) kw 0~65535, no PT/CT factor kvar R 3p3w/ 11 03:0012 Total Apparent Power (S) kva 12 03:0013 Frequency (F) 0~ Hz R 3p3w/ 13 03:0014 Power Factor (PF) 0~ R 3p3w/ 14 03:0015 DO Status 0=off, 1=on R 3p3w/ 15 03:0016 DI Status 0=off, 1=on R 3p3w/ Modbus Reference 2.6.1e! 4/25

6 Real Time Data (Two Word Sized) Certain parameters in this table are affected by the PT, CT or both depending a combination of the Use PTCT flag (see page 7 for details) and the 5A YES/NO settings. For the dual source mode, DI Off indicates city mains power and DI On indicates generator power. Register Word Modscan Parameter Range Scale Unit 20 low 03:0021 Phase A Voltage 21 high 03:0022 (VA) Read/ Write Applies To 22 low 03: high 03: low 03: high 03: low 03: high 03: low 03: high 03: low 03: high 03: low 03: high 03:0034 Phase B Voltage (VB) Phase C Voltage (VC) Line A-B Voltage (VAB) Line B-C Voltage (VBC) Line C-A Voltage (VCA) Phase A Current (IA) 0~1,400, V R 3p3w/ 0~2,424, V R 3p3w/ 34 low 03: high 03: low 03: high 03:0038 Phase B Current (IB) 0~5,000, A R 3p3w/ Phase C Current (IC) 38 low 03: high 03: low 03: high 03: low 03: high 03:0044 Total Active Power (P) Total Reactive Power (Q) Total Apparent Power (S) 0~999,999,999 1 W 0~999,999,999 1 VAr R 3p3w/ 0~999,999,999 1 VA 44 low 03: high 03: low 03: high 03:0048 Frequency (F) 450~ Hz R 3p3w/ Power Factor (PF) 0~ R 3p3w/ 48 low 03: high 03: low 03: high 03: low 03: high 03: low 03: high 03: low 03: high 03:0058 Total Active Energy (EP) Total Reactive Energy (EQ) 15 minute block demand (BD15) 1 minute block demand (BD1) Generator Total Active Energy (GEP) 0~1,000,000, kwh R/W 3p3w/ 0~1,000,000, kvarh R/W 3p3w/ 0~999,999, W R 3p3w/ 0~999,999, W R 3p3w/ 0~1,000,000, kwh R/W 3p3w/ Modbus Reference 2.6.1e! 5/25

7 Register Word Modscan Parameter Range Scale Unit Read/ Write Applies To 58 low 03:0059 Generator Total Reactive Energy 0~1,000,000, kvarh R/W 3p3w/ 59 high 03:0060 (GEQ) * Note: Register 56~57 GEP is valid only for the dual source model (-X) Main (Utility) Energy Data Register Word Modscan Parameter Range Scale Unit 80 low 03:0081 Phase A Active Energy 81 high 03:0082 (EPA) Read/ Write Applies To low high 03: :0084 Phase B Active Energy (EPB) 84 low 03:0085 Phase C Active Energy 85 high 03:0086 (EPC) 86 low 03: high 03:0088 Total Active Energy (EP) 88 low 03:0089 Phase A Reactive Energy 89 high 03:0090 (EQA) 90 low 03:0091 Phase B Reactive Energy 91 high 03:0092 (EQB) 92 low 03:0093 Phase C Reactive Energy 93 high 03:0094 (EQC) low high 03: :0096 Total Reactive Energy (EQ) 96 low 03:0097 Phase A Active Power 97 high 03:0098 (PA) 98 low 03:0099 Phase B Active Power 99 high 03:0100 (PB) 100 low 03:0101 Phase C Active Power 101 high 03:0102 (PC) 102 low 03: high 03:0104 Total Active Power (P) 104 low 03:0105 Phase A Reactive Power 105 high 03:0106 (QA) 106 low 03:0107 Phase B Reactive Power 107 high 03:0108 (QB) 108 low 03:0109 Phase C Reactive Power 109 high 03:0110 (QC) 110 low 03: high 03:0112 Total Reactive Power (Q) 112 low 03:0113 Phase A Apparent Power 113 high 03:0114 (SA) low high 03: :0116 Phase B Apparent Power (SB) 116 low 03:0117 Phase C Apparent Power 117 high 03:0118 (SC) 118 low 03: high 03:0120 Total Apparent Power (S) 0~1,000,000, kwh R 0~1,000,000, kvarh R 0~999,999,999 1 W R 0~999,999,999 1 VAr R 0~999,999,999 1 VA R 3p3w/ 3p3w/ 3p3w/ 3p3w/ 3p3w/ Modbus Reference 2.6.1e! 6/25

8 Register Word Modscan Parameter Range Scale Unit Read/ Write Applies To word 03:0121 Phase A Power Factor (PFA) word 03: word 03:0123 Phase B Power Factor (PFB) Phase C Power Factor (PFC) 0~ R word 03:0124 Total Power Factor (PF) 3p3w/ Generator Energy Data This Generator Energy Data table is valid only for the dual source model (-X). Register Word Modscan Parameter Range Scale Unit 144 low 03:0145 Generator Phase A Active 145 high 03:0146 Energy (GEPA) Read/ Write Applies To low high 03: :0148 Generator Phase B Active Energy (GEPB) 148 low 03:0149 Generator Phase C Active 149 high 03:0150 Energy (GEPC) 150 low 03:0151 Generator Total Active 151 high 03:0152 Energy (GEP) 152 low 03:0153 Generator Phase A 153 high 03:0154 Reactive Energy (EQA) low high 03: :0156 Generator Phase B Reactive Energy (EQB) 156 low 03:0157 Generator Phase C 157 high 03:0158 Reactive Energy (EQC) 158 low 03:0159 Generator Total Reactive 159 high 03:0160 Energy (EQ) 0~1,000,000, kwh R 0~1,000,000, kvarh R 3p3w/ 3p3w/ Notes: BD15 = 15 minute sliding block demand, data updated every 3 seconds, this is available only in the BD1 = 1 minute sliding block demand, data updated every 3 seconds Registers 56 to 59 and 144 to 159 are the second set of energy accumulator registers that is available only for the dual source model (-X-STD). This set is used when the generator power is active. The data read from registers 56~57 are the same as 150~151, while registers 58~59 are the same as 158~159, the difference being that only the registers 56~59 are writable. Modbus Reference 2.6.1e! 7/25

9 Setup Data Register Modscan Parameter Range Scale Unit Read/Write :0129 Phase/Wire: 3p3w or 0=, 1=3p3w-2CT, 2=1p3w, 3=3p3w-3CT R : : :0132 Device :0133 Baud Rate :0134 PT ratio :0135 CT ratio 1~254 default = 1 0=1200, 1=2400, 2=4800, 3=9600 default = ~40,000 default = ~1000 default = R/W 1 bauds R/W R/W R/W : : : : :0140 Temperature 0~100 1 C R :0141 Standard 5A or Dedicated CT :0142 Firmware Version 0=5A Yes (standard 5A CT), 1=5A No (dedicated CT) High Byte: 0~100, Low Byte: 0~ R/W R :0143 DO status 0=off, 1=on R :0144 DI status 0=off, 1=on R Notes: The product of the PT ratio and CT ratio should not exceed 300,000. After changing either or both the PT and CT ratio, be sure to read back the value written to make sure that it was accepted by the. Register 142 and 143 for the DO and DI status respectively are duplicates of registers 14 and 15. Writing to the DO is a separate command and uses a different register address. See the DO Control section for details. For the dual source model (-X-STD), the DI is used to determine whether the current power source is from the utility mains or generator. When used as such, DI Off indicates utility mains power and DI On indicates generator power. Register Modscan Parameter Range Scale Unit Read/Write :0241 Product 0=n/a, 1=-P, 2=n/a, 3=-X, 4=-4 * see table table for feature matrix R Modbus Reference 2.6.1e! 8/25

10 Model Model DO Dual Mode Pulse Out Demand Response -STD none P YES --- -X YES YES YES YES Register Modscan Parameter Range Scale Unit Read/Write :0242 Use PTCT 0=no, 1=yes R/W The table below indicates whether the given parameter (Voltage, Current, etc) is to be pre-multiplied by the PT, CT or both. The Use PTCT flag is the same as that which can be set from the front panel display. Both the displayed value and value read through Modbus are affected. 5A Yes/No setting No No Yes Yes Use PTCT setting no yes no yes Voltage Current kw, kva, kvar, kwh, kvarh pre-multiply by PT --- pre-multiply by PT pre-multiply by PT pre-multiply by CT pre-multiply by PT & CT DO Control The can be optionally be equipped with a DO (dry contact digital output), available on the -4 model. The corresponding Modbus registers below are effective only when the optional DO is available. Writing to the DO requires the use of the Modbus function code 5. Register Description Range 1 Control DO, remember state and restore after a power on reset 255= ON, 0= OFF 2 Control DO, DO is always off after a power on reset 255= ON, 0= OFF Modbus Reference 2.6.1e! 9/25

11 Examples Examples Read Phase Voltage Register = 22 (Phase B Voltage) XH = 22 div 256 = 0 XL = 22 mod 256 = 2 Register Number of Points Byte Read Data (low word) Read Data (high word) Count high (Y1) low (Y2) high (Y3) low (Y4) low high Assume that the Use PTCT ratio is set to yes and the PT ratio is set to 20, then the value obtained herein is already the voltage on the primary side of the PT and there is no need to manually multiply the PT ratio. Voltage (primary) = (0 * 16,777, * 65, * ) * 0.1 V = V Read Phase Current Register = 36 (Phase C Current) XH = 36 div 256 = 0 XL = 36 mod 256 = 0 Register Number of Points Byte Read Data (low word) Read Data (high word) Count high (Y1) low (Y2) high (Y3) low (Y4) low high Assume that the Use PTCT ratio is set to yes and the CT ratio is set to 40, then the value obtained herein is already the current on the primary side of the CT and there is no need to manually multiply the CT ratio. Current (primary) = (0 * 16,777, * 65, * ) * A= A Modbus Reference 2.6.1e! 10/25

12 Read Power Register = 38 (Total Active Power) XH = 38 div 256 = 0 XL = 38 mod 256 = 38 Register Number of Points Byte Read Data (low word) Read Data (high word) Count high (Y1) low (Y2) high (Y3) low (Y4) low high Assume that the Use PTCT ratio is set to yes and the PT ratio is set to 10 and the CT ratio is set to 40, then the value obtained herein is already the power as measured on the primary side, and there is no need to manually multiply either the PT or CT ratio. Power = (1 * 16,777, * 65, * ) * 1 W = 19,152,400 Watts Read Frequency Register = 44 XH = 44 div 256 = 0 XL = 44 mod 256 = 44 Register Number of Points Byte Read Data (low word) Read Data (high word) Count high (Y1) low (Y2) high (Y3) low (Y4) low high Frequency = (0 * 16,777, * 65, * ) * 0.1 Hz = 60 Hz Modbus Reference 2.6.1e! 11/25

13 Read Power Factor Register = 46 XH = 46 div 256 = 0 XL = 46 mod 256 = 46 Register Number of Points Byte Read Data (low word) Read Data (high word) Count high (Y1) low (Y2) high (Y3) low (Y4) low high Data = (Y3 * 16,777,216 + Y4 * 65,536 + Y1 * Y2) * unit Frequency = (0 * 16,777, * 65, * ) * = 0.87 Read Total Active Energy (kwh) Register = 48 XH = 48 div 256 = 0 XL = 48 mod 256 = 48 Register Number of Points Byte Read Data (low word) Read Data (high word) Count high (Y1) low (Y2) high (Y3) low (Y4) low high Assume that the Use PTCT ratio is set to yes, then the value obtained herein is already the total active energy, and there is no need to manually multiply the PT or CT ratio. Frequency = (0 * 16,777, * 65, * ) * 0.01 kwh = kwh Modbus Reference 2.6.1e! 12/25

14 Write Total kwh Register = 48 XH = 48 div 256 = 0 XL = 48 mod 256 = 48 Total kwh = kwh Y3 = ( kwh / 0.01 kwh) div 16,777,216 = 0 Y4 = (( kwh / 0.01 kwh) mod 16,777,216) div 65,536 = 9 Y1 = (( kwh / 0.01 kwh) mod 65,536) div 256 = 187 Y2 = ( kwh / 0.01 kwh) mod 256 = 245 Number of Write Data Register Registers Byte low word high word Count high (XH) low (XL) high low high (Y1) low (Y2) high (Y3) low (Y4) low high Register Number of Registers Read DO Status Note that the DO status can be read from either register 14 or 142, while the DI status can be read from either register 15 or 143. Register = 142 XH = 142 div 256 = 0 XL = 142 mod 256 = 142 Register Number of Points Byte Read Data (low word) DO Status = {0 => Off, 1 => On}.index(1) = On Modbus Reference 2.6.1e! 13/25

15 Control DO Example 1 (Turn DO on and restore after a Power On Reset) Input = 1 DO = ON, restore after a Power on Reset / Starting Register Force Data high low high low low high Output none Example 2 (Turn DO off and restore after a Power On Reset) Input = 1 DO = OFF, restore after a Power on Reset / Starting Register Force Data high low high low low high Example 3 (Turn DO on but donʼt restore after a Power On Reset, DO will always be off after a Power On Reset) Input = 1 DO = ON, donʼt restore after a Power on Reset / Starting Register Force Data high low high (Y1) low low high Example 4 (Turn DO off but donʼt restore after a Power On Reset, DO will always be off after a Power On Reset) Input = 1 DO = OFF, donʼt restore after a Power on Reset / Starting Register Force Data high low high (Y1) low low high Modbus Reference 2.6.1e! 14/25

16 Read Phase/Wire Register = 128 XH = 128 div 256 = 0 XL = 128 mod 256 = 128 Register Number of Points Byte Read Data Index = (Y1 * Y2) * Unit = (0 * ) * 1 = 1 Phase/Wire = {0 =>, 1 => 3p3w-2CT, 2 => 1p3w, 3=3p3w-3CT} [1] = 3p3w-2CT Read BD15 (15 minute block demand) Register = 52 XH = 52 div 256 = 0 XL = 52 mod 256 = 52 Register Number of Points Byte Read Data BD15 = (48 * ) * 0.1 W = Watts Modbus Reference 2.6.1e! 15/25

17 Read Device This command reads the Modbus slave address. Note that in order to read this address data, you should already know the address to query or use the broadcast address (255). Therefore the address you read should be the same as the slave address you queried from, unless you use the broadcast address. This command is useful for when you donʼt already know the existing address of the. In which case, you should use the broadcast address to compel the to reply regardless of its slave address. But note that this will only work when there is a one to one connection between the host PC and the, there must not be any other device on the bus network; otherwise the other slave devices will also respond to the broadcasted command and the replies from the various devices will collide. Register = 131 XH = 131 div 256 = 0 XL = 131 mod 256 = 131 Register Number of Points Byte Read Data Device = (Y1 * Y2) * Unit = (0 * ) * 1 = 42 Modbus Reference 2.6.1e! 16/25

18 Write Device This command overwrites the Modbus slave address. Once you issue this command, the original address is lost. Therefore, the next time that you issue commands to the same, you must use the new address, it will no longer respond to the old address, unless of course the new address is the same as the old. Note that the slave address can also be changed through the front panel. This command can be used with the broadcast address 255, if the original address of the is unknown. But the must be in a one to one connection with the host PC, no other devices must be on the same bus network; otherwise the other slave devices will also be changed and their simultaneous replies will collide. Current adddress = 68 Register = 131 XH = 131 div 256 = 0 XL = 131 mod 256 = 131 New = 241 Y1 = (243 / 1) div 256 = 0 Y2 = (243 / 1) mod 256 = 243 Register Number of Registers Byte Write Data high (XH) low (XL) high low Register Number of Registers Modbus Reference 2.6.1e! 17/25

19 Read Baud Rate This command reads the baud rate setting of the. Obviously to read this value, you should already know the correct baud rate in order to communicate in the first place. Register = 132 XH = 132 div 256 = 0 XL = 132 mod 256 = 132 Register Number of Points Byte Read Data Data = (Y1 * Y2) * Unit Index = (0 * ) * 1 = 2 Baud Rate = {0 => 1200, 1 => 2400, 2 => 4800, 3 => 9600} [Index] Baud Rate = {0 => 1200, 1 => 2400, 2 => 4800, 3 => 9600} [2] = 4800 bauds Write Baud Rate This command overwrites the existing baud rate setting of the. When issuing this command, the original baud rate setting is lost. Therefore, the next time that you issue commands to the same, make sure to use the new baud rate, it will no longer respond to the old baud rate, unless of course the new baud rate is the same the old. XH = 132 div 256 = 0 XL = 132 mod 256 = 132 Baud Rate = 4800 bauds Index = {0 => 1200, 1 => 2400, 2 => 4800, 3 => 9600}.value(2400) = 1 Y1 = Index div 256 = 1 div 256 = 0 Y2 = Index mod 256 = 1 div 256 = 1 Register Number of Registers Byte Write Data high (XH) low (XL) high low Register Number of Registers Modbus Reference 2.6.1e! 18/25

20 Read PT Ratio Register = 133 XH = 133 div 256 = 0 XL = 133 mod 256 = 133 Register Number of Points Byte Read Data Device = (Y1 * Y2) * Unit = (7 * ) * 0.01 = Write PT Ratio Register = 133 XH = 133 div 256 = 0 XL = 133 mod 256 = 133 PT Ratio = 20 Y1 = (20 / 0.01) div 256 = 7 Y2 = (20 / 0.01) mod 256 = 208 Register Number of Registers Byte Write Data high (XH) low (XL) high low Register Number of Registers Modbus Reference 2.6.1e! 19/25

21 Read CT Ratio Register = 134 XH = 134 div 256 = 0 XL = 134 mod 256 = 134 Register Number of Points Byte Read Data Device = (Y1 * Y2) * Unit = (0 * ) * 1 = 80 Write CT Ratio Register = 134 XH = 134 div 256 = 0 XL = 134 mod 256 = 134 CT Ratio = 60 Y1 = (60 / 1) div 256 = 0 Y2 = (60 / 1) mod 256 = 60 Register Number of Registers Byte Write Data high (XH) low (XL) high low Register Number of Registers Modbus Reference 2.6.1e! 20/25

22 Read Standard/Dedicated CT Register = 140 XH = 140 div 256 = 0 XL = 140 mod 256 = 140 Register Number of Points Byte Read Data Index = (Y1 * Y2) * Unit = (0 * ) * 1 = 1 Standard/Dedicated CT = {0 => Standard 5A, 1 => Dedicated CT} [Index] Standard/Dedicated CT = {0 => Standard 5A, 1 => Dedicated CT} [1] = Dedicated CT Write Standard/Dedicated CT Register = 140 XH = 140 div 256 = 0 XL = 140 mod 256 = 140 Standard/Dedicated CT = Standard Index = {0 => Standard 5A, 1 => Dedicated CT}.value(Standard 5A) = 0 Y1 = Index div 256 = 0 div 256 = 0 Y2 = Index mod 256 = 0 div 256 = 0 Register Number of Registers Byte Write Data high (XH) low (XL) high low Register Number of Registers Modbus Reference 2.6.1e! 21/25

23 Read Temperature This reads the temperature of the metering IC chip. Register = 139 XH = 139 div 256 = 0 XL = 139 mod 256 = 139 Register Number of Points Byte Read Data Firmware Version = (Y1 * Y2) = (0 * ) * 1 C = 45 C Read Firmware Version Register = 141 XH = 141 div 256 = 0 XL = 141 mod 256 = 141 Register Number of Points Byte Read Data Firmware Version = (Y1 * Y2) = (1 * ) = 312 Modbus Reference 2.6.1e! 22/25

24 Computation Computation The conforms to the Modbus/RTU protocol and thus uses 16 for its error checking. The computed is appended to the end of the message with the LSB first and then the MSB. Below is the pseudo code for computing the as used by the standard Modbus/RTU. The pseudo code is written in the Ruby language and can be directly used as such. Definition def get_crc (*byte_array) sum = 0xFFFF byte_array.each do byte sum ^= byte 8.times do carry = (1 == sum & 1) sum = 0x7FFF & (sum >> 1) sum ^= 0xA001 if carry end end return [sum & 0xFF, sum >> 8] end Usage >> crc = get_crc(1,3,0,141,0,5) => [21, 226] <---- [ low byte, high byte] Modbus Reference 2.6.1e! 23/25

25 Notes on Modscan Notes on Modscan This is not a manual of Modscan, but only a short note describing its manual commands capability. Most users are familiar with Modscanʼs ability to read and continuously poll a designated device using Modbus commands 1 to 4. But in addition, Modscan also has the ability to issue other commands as well. For the DEM, function code 5 and 16 needs to be issued as well. To issue them, first make sure that the connection has already been established and running then go to the menu and run the dialog box User Defined Command String from [Setup->Extended->User Msg] as shown in the screen captures below: Modbus Reference 2.6.1e! 24/25

26 Additional Resources Additional Resources Although every effort has been taken to ensure that this document is free from errors, some may still remain. If found please send an to: in the subject line write Errata and please indicate the name of this document Modbus Reference, revision number, page number and indicate the error with its correction. Thank you. We have made sure that this document is as clear and useful to you as possible, but any suggestions on improving this document to serve you even better would be welcome. Send comments and suggestions to: in the subject line, write Comments and please indicate the name of this document Modbus Reference. Questions are also welcome. This document only covers the Modbus protocol registers as used by the, for interfacing and other information please refer to the userʼs manual. Modbus Reference 2.6.1e! 25/25