3. Phase Indications. kwh 1. Introduction. Units of measurement. kwh. Volts Amps Hz Kwatts KVAr KVA. Degree Wh VAh
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1 EM 349 SS Single Phase Energy Meter 3. Phase Indications Installation & Operating Instructions Section Contents. Introduction 2. Measurement Reading Screen 3. Phase Indications 4. Programming 4. Password Protection 4.2 Menu selection 4.2. System Parameter selection screen Potential transformer Primary value Potential transformer secondary value transformer Primary value Energy Display on modbus Energy Digit Rollover(reset) count Communication Parameter selection screen Setting RS 485 Baud rate RS 485 Parity selection Reset Parameter selection screen Resetting Parameter Relay Output parameter selection screen Pulse Duration (width) selection Pulse rate divisor Quit screen 5. Relay Output (Optional). 5. Pulse Output 6. RS 485 (Modbus) Output 6. User assignable Modbus Register 7. Phaser Diagram TABLE : Measured Parameters Display Parameter Active Energy (8 digit counter) Modbus Parameter System System Frequency Active Power Reactive Power Apparent Power Phase Angle Active Energy Apparent Energy Units of measurement Volts Amps Hz Kwatts KVAr KVA Degree Wh VAh LED Von glowing Phase present LED Von off phase absent LED glowing out of phase w.r.t voltage. LED off in phase w.r.t voltage Installation 8. EMC Installation Requirements 8.2 Case Dimensions and Panel Cut-out 8.3 Wiring 8.4 Auxiliary Supply 8.5 Fusing 8.6 Earth / Ground Connections Network Wiring. Specification 2. Measurement Reading Screen In normal operation the user is presented with active energy measurement screen. Screen : Active Energy () Setup Parameter Screen cd (PassWord) Exit from setup Parameter to Main Display. Connection for Optional Pulse output / RS 485 (Select). Introduction Ultra high brightness LED display. 55_Rev.D -5/3 The instrument is a panel mounted 96 x 96mm DIN Quadratic energy meter. It accumulates Active energy, in single phase network. The instrument also measures AC, AC, Frequency, Power, Power factor, Phase Angle, Apparent Energy which can be accessed via Modbus. All voltage & measurements are True RMS upto 5th harmonic. Meter can be configured & Programmed at site for the following : PT Primary, PT Secondary, CT Primary, Modbus Settings & Pulse output settings. The front panel has two push buttons through which the user can reset the energy & configure the product. The front panel has Impulse red led, flashing at rate proportional to measured power. Its impulse rate is 36impulses/. Active energy is displayed in 8 digit counter with auto ranging feature. Below given table describes auto ranging with minimum resolution of energy measured in perticular range. When LED glows the energy is displayed in mega watt. Display Format X LED Minimum resolution ON ON ON miliwatt miliwatt miliwatt Watt Watt Watt kilowatt kilowatt kilowatt MegaWatt Maximum Active energy count reached is MegaWatt after this counter rollovers to zero and measurement starts from first range. Impulse led on front panel can be used to cross check the energy calibration on site. Its nominal impulse rate is 36 impulses /. A SYS SEriAL (Select System Parameter) Parameter (Sec 4.2.) (Sec 4.2.2) UP (PT Primary) (Sec 4.2..) US (PT Secondary) (Sec ) AP (CT Primary) (Sec ) EnO (Energy Display on ModBUS) (Sec ) Edr (Energy digit reset count) (Sec ) A ( Serial Communication ) Add (Modbus ) (Sec ) br (Baud Rate) (Sec ) Pr (Parity Bits) (Sec ) reset (Reset Parameter) (Sec 4.2.3) non (No Parameter), E (Energy), Down key (Sec ) relay (Select Relay Parameter) (Sec 4.2.4) dur ( Relay Pulse Duration) (Sec ) rat (Pulse Rate Divisor) (Sec ) quit (Exit Menu) (Sec 4.2.5) : UP KEY : DOWN KEY A Down Up 2
2 4. Programming The following sections comprise step by step procedures for configuring the meter for individual user requirements. To access the set-up screens press and hold the Down and Up Key simultaneously for 5 seconds. This will take the User into the Password Protection Entry Stage (Section 4.). 4.. Password Protection Password protection can be enabled to prevent unauthorised access to set-up screens, by default password protection is not enabled. Password protection is enabled by selecting a four digit number other than, setting a password of disables the password protection. Password Incorrect. The unit has not accepted the Password entered. Pressing the " Down" key will return to the Enter Password stage. Up key exits the Password menu and returns operation to the measurement reading mode. New / Change Password (*Decimal point indicates that this will be flashing). first digit from through to 9, the value will wrap from 9 Up key to advance the operation to the next digit and sets the first digit, in this case to 2 New / Change Password, first digit entered, prompting for second digit. (*Decimal point indicates that this will be flashing). second digit from through to 9, the value will wrap from 9 Up key to advance the operation to the next digit and sets the second digit, in this case to 4.2 Menu selection System Parameter selection screen. This menu screen is used to select the different system Parameter like system type, CT Ratio, PT Ratio, Up key allows the user to set Different system parameters. (see section to ) down key will advance to Communication selection screen (see section 4.2.2) Communication Parameter selection screen Reset Parameter selection screen. This menu screen is used to select the different communication parameters like selection, RS485 Parity selection, RS485 baud rate Up key allows the user to set different Communication parameters (see section to ) down key will advance to Reset parameter Screen. (see section 4.2.3) This menu screen is used to Reset the energy parameter. Up key allows the user to Reset energy system parameter (see section ) 4.2. System parameters Selection Potential Transformer Primary Value This screen enables the user to set primary transformer voltage In terms of kilovolts (note the enunciator). Up key accepts the present value and advances to the potential Transformer secondary Value edit menu. (See Section ) Down key will enter the Potential Transformer Primary Value Edit mode. Initially the multiplier must be selected, pressing the Down key will move the decimal point position to the right until it reaches # # #.# after which it will return to #. # # #. Up key accepts the present multiplier (decimal point position) and advances to the potential Transformer primary Digit Edit mode. Potential Transformer primary Digit Edit Down key will scroll the value of the most significant digit from through to 9 unless the presently displayed Potential Transformer Primary Value together with the Transformer Primary Value, previously set, would result in a maximum power of greater than MVA per phase in which case the digit range will be restricted. Up key accepts the present value at the cursor position and advances the cursor to the next less significant digit. Note : the flashing decimal point indicates the cursor position, a steady decimal point will be present to identify the scaling of the number until the cursor position coincides with the steady decimal point position. At this stage the decimal point will flash. Enter Password, second digit entered, prompt for third digit. Use the Down key to scroll the value of the third digit from through to 9, the value will wrap from 9 Up key to advance to next digit. New / Change Password, second digit entered, prompting for third digit. (*decimal point indicates that this will be flashing). third digit from through to 9, the value will wrap from 9 Up key to advance the operation to the next digit and sets the third digit, in this case to 5 down key will advance to Output Option selection screen (see section 4.2.4) Relay Output Parameter selection screen. This menu screen will allow the user to select different Parameter related to Relay Output. When the least significant digit has been set pressing the Potential Transformer Primary Value Confirmation stage. Up key will advance to the Screen showing display of.239 kv i.e. 239 Volts indicating steady decimal point and cursor flashing at the hundreds of volts position. Potential Transformer Primary Value Confirmation Potential Transformer Primary Value. If the scaling is not correct, pressing the Down key will return to the Potential Transformer Primary Value Edit stage. Enter Password, third digit entered, prompt for fourth digit. Use the Down key to scroll the value of the fourth digit from through to 9, the value will wrap from 9 Up key to advance to verification of the password. Enter Password, fourth digit entered, awaiting verification of the password. Password confirmed. Pressing Down key will advance to the New / change Password entry stage. New / Change Password, third digit entered, prompting for fourth digit. (* denotes that decimal point will be flashing). fourth digit from through to 9, the value will wrap from 9 Up key to advance the operation to the New Password Confirmed and sets the fourth digit, in this case to 3. New Password confirmed. Down key will return to the New/Change Password. Up key will advances to the Menu selection screen.(see section 4.2) Quit screen. Up key allows the user to select & Configuare the relay output option (see section ) down key will advance to Quit screen. (see section 4.2.5) This screen allows user to Quit from Menu. Up key will allow the user to Quit from menu & return to measurement screen. 4.2.) Up key sets the displayed value and will advance to the Potential Transformer secondary Value (See Section ) Potential Transformer secondary Value The value must be set to the nominal full scale secondary voltage which will be obtained from the Transformer when the potential transformer(pt)primary is supplied with the voltage defined in potential transformer primary voltage. The ratio of full scale primary to full scale secondary is defined as the transformer ratio. Up key accepts the present value and advances to the Transformer Primary Value edit menu. (See Section ) Note that the range of instrument is from 4 to 277V for 239 VL-N. Please refer the table below for different ranges. Down key will enter the Potential Transformer Secondary Value Edit mode. Pressing the Down key will scroll the value of the most significant digit From available range of PT secondary value Up key accepts the present value at the cursor position and advances the cursor to the next less significant digit. Potential Transformer secondary ranges for various Input s Up key will advance to the Menu selection screen. (See section 4.2). 63.5V L-N 57V - 69V L-N 33.V L-N 7V - 39V L-N 239.6V L-N 4V - 277V L-N 3 4
3 Note : the flashing decimal point indicates the cursor position, a steady decimal point will be present to identify the scaling of the number until the cursor position coincides with the steady decimal point position. At this stage the decimal point will flash. When the least significant digit has been set pressing the Up key will advance to the Potential Transformer secondary Value Confirmation stage Transformer Primary Value The nominal Full Scale that will be displayed as the Line currents. This screen enables the user to display the Line currents inclusive of any transformer ratios, the values displayed represent the in Amps. Up key accepts the present value and rollbacks to menu selection screen (See Section 4.2) Down key will enter the Transformer Primary Value Edit mode. This will scroll the value of the most significant digit from through to 9, unless the presently displayed Transformer Primary Value together with the Potential Transformer Primary Value results in a maximum power of greater than MVA in which case the digit range will be restricted, the value will wrap. Example: If primary value of PT is set as 4kV (max value) then primary value of is restricted to 736A. Up key will advance to the next less significant digit. (* Denotes that decimal point will be flashing). The Maximum Power restriction of MVA refers to 2% of nominal current and 2% of nominal voltage, i.e, MVA nominal power per phase. When the least significant digit had been set, pressing the Transformer Primary Value Confirmation stage. Potential Transformer Secondary Value Confirmation Potential Transformer Secondary Value. If the scaling is not correct, pressing the Down key will return to the Potential Transformer Secondary Value Edit Up key sets the displayed value and will advance to the current Transformer Primary Value (See Section ) Up key will advance to the The minimum value allowed is, the value will be forced to if the display contains zero when the Up key is pressed Energy Display on modbus Transformer Primary Value Confirmation. Transformer Primary Value. If the scaling is not correct, Down key will return to the Transformer Primary Value Edit stage with the most significant digit highlighted (associated decimal point flashing). This screen enable user to set energy in terms of Wh / KWh / MWh on RS 485 Output depending as per the requirement. Up key sets the displayed value and will advance to the Energy Display on Modbus menu. (See section ) Pressing Up key accepts the presents value and advances to the Energy digit Rollover(reset) count menu (See section ). Down key will enter the Energy Display On Modbus Edit mode and scroll the value through the values,2 & 3 wrapping back to : Energy In Wh 2 : Energy in KWh 3: Energy in MWh. Up key advances to the Energy Display Energy Display On Modbus Confirmation. Energy Display On Modbus. Down key will enter the Energy Display On Modbus Edit. Pressing Up key sets the displayed value and will advance to the Energy digit reset count menu. (See section ) Note : Default value is set to i.e. Energy on Modbus will be in terms of Wh resp Energy Digit Rollover(reset) count : Communication Parameter Selection : Setting : This screen applies to the RS 485 output only. This screen allows the user to set RS485 parameter for instruments This screen enables user for setting maximum energy count after which energy will rollback to zero depends upon setting of Wh,KWh, & MWh. Up key sets the displayed value and will jump back to the system parameter selection (See Section 4.2.) Down key will enter the Energy digit reset count edit mode. This will scroll the value of reset count from 7 to 4 for Wh,from 7 to 2 for KWh & from 7 to 9 for MWh. Ex. If energy display on modbus is set Wh & It will set Energy digit count to then energy will reset after 9,999,999,999 & then will rollback to zero. Pressing Up key will advance to Energy digit reset count confirmation screen. Down key will re-enter Energy digit Rollover(reset) count edit mode. Up key sets the displayed value and will rollbacks to menu selection screen (see section 4.2). Note : ) Default value is set to 4 i.e if energy count crosses4 digit it will rollback to zero. 2) Energy displays on modbus is set to (2) & energy digit reset count is set to 2.Energy screen on display will show i.e Energy overflow.when energy crosses the digit count. 3) Energy displays on modbus is set to (3) & energy digit reset count is set to 9.Energy screen on display will show i.e Energy overflow. when energy crosses the 8 digit count. The range of allowable address is to 247. Enter, prompt for first digit. Enter, first digit entered, prompt for second digit Use the Down key to scroll the value of the second digit Up key to advance to next digit. Enter, second digit entered, prompt for third digit Use the Down key to scroll the value of the third digit Enter for third digit. Screen. Down key to scroll the value of the first digit Up key to advance to next digit. Up key to advance to confirmation confirmation Screen. This Screen confirms the set by user. Up key to advance to next Screen Rs485 Baud Rate (See Section ) Edit mode. Down key will reenter the RS 485 Baud Rate : This screen allows the user to set Baud Rate of RS 485 port. The values displayed on screen are in kbaud.. Pressing Up key accepts the present value and advance to the Parity Selection (See Section ) Down key will enter the Baud Rate Edit mode and scroll the value through 2.4, 4.8, 9.6, 9.2 and back to 2.4 RS 485 Baud Rate confirmation : Pressing Down key will be re-enter into the. Baud Rate Edit mode Up key will select the value and advances to the Parity Selection (See Section ) RS 485 Parity Selection : This screen allows the user to set Parity & number of stop bits of RS 485 port. Pressing Up key accepts the present value and advance to Menu selection (see section 4.2). Down key will enter the Parity & stop bit Edit mode and scroll the value through odd : odd parity with one stop bit no : no parity with one stop bit no 2 : no parity with two stop bit E : even parity with one stop bit RS 485 Parity confirmation : Pressing Down key will be re-enter into Parity Edit mode Reset Parameter Selection : Resetting Parameter The following screens allow the users to reset the all Energy. Reset (None) Up key will set the value. Up key again will jump back to the menu selection screen (see section 4.2). Pressing Up key advances to menu selection screen (see section 4.2) Down key will enter the Reset option mode and scroll through Parameter and wrapping back to None. Reset option select, The user has scrolled through to the E Energy value. Pressing Up key will select the value and advance to the Reset Energy Confirmation Mode. & resets energy. Integrated Energy at the moment of resetting energy will become zero. Reset Energy Confirmation. option mode. Down key will re-enter the Reset Pressing Up key will jump back to the menu selection screen (see section 4.2) Relay output menu Pulse Duration Selection: This screen applies only to the Pulsed output mode of the relay This screen allows the user to set Relay energisation time in milliseconds Pulse Rate Pulse Duration Edit. Pressing Up key accepts the present value and advance to pulse rate selection menu (see section ). Down key will enter the Pulse Duration Edit mode and scroll the value through 6,, 2 and wrapping back to 6. Up key will select the value and advances to Pulse Duration Confirmation. Pulse Duration Confirmation. Pulse duration. pressing the Down key will re-enter the Pulse Duration Edit mode. Pressing Up key set displayed value and Will advance to pulse rate selection menu (See section ) This screen applies to the Relay Output option only. The screen allows user to set the energy pulse rate divisor. Divisor values can be selected through,,,. 5. Relay output (Optional) : 5. Pulse Output : TABLE 3 : Energy Pulse Rate Divisor Pulse rate Divisor Pulse System Power* per Whr per r per MWhr per Whr per r per MWhr per Whr per r per MWhr per Whr per r per MWhr Pulse Duration 6 ms, ms or 2 ms * System power = CT(Primary) x PT(Primary)L-N Pressing Up key accepts the presents value and advances to the Menu Selection Screen (See section ). Down key will enter the Pulse rate divisor Edit mode and scroll the value through the values,,, wrapping back to. Up key advances to the Pulse rate Divisor Confirmation menu. Pulse Rate Divisor Confirmation. Pulse rate divisor. If the Pulse rate shown is not correct, pressing the Down key will return to the Pulse rate divisor Edit stage by blanking the bottom line of the display. Pressing Up key sets the displayed value and will advance to the Relay output Option Menu. (See section 4.2.4) Pulse output is the potential free, very fast acting relay contact which can be used to drive an external mechanical counter for energy measurement. Rish EM 349 SS has one pulse output. Relay Contact One normally open & one normally closed Pulse Duration 6ms, ms or 2ms. For Energy Output in Wh 2. For Energy Output in KWh Divisor Divisor Pulse rate Pulse System Power* per KWhr per KWhr per MWhr 3. For Energy Output in MWh Pulse rate Pulse System Power* per MWhr per MWhr per GWhr 5 6
4 6. RS 485 ( ModBus ) Output : Meter supports MODBUS (RS485) RTU protocol( 2-wire ). Connection should be made using twisted pair shielded cable. All "A" and "B" connections are daisy chained together. The screens should also be connected to the Gnd terminal. To avoid the possibility of loop currents, an Earth connection should be made at one point on the network.loop (ring) topology does not require any termination load. Line topology may or may not require terminating loads depending on the type and length of cable used. The impedance of the termination load should match the impedance of the cable and be at both ends of the line. The cable should be terminated at each end with a 2 ohm (/4 Watt min.) resistor. RS 485 network supports maximum length of.2km. Including the meter, a maximum of 32 instruments can be connected in RS485 network.the permissible address range for meter s between and 247 for 32 instruments. Broadcast Mode (address ) is not allowed. The maximum latency time of an meter is 2ms i.e. this is the amount of time that can pass before the first response character is output. After sending any query through software ( of the Master), it must allow 2ms of time to elapse before assuming that the meter is not going to respond. If slave does not respond within 2 ms, Master can ignore the previous query and can issue fresh query to the slave. The each byte in RTU mode has following format: Format of Data Bytes Error Checking Bytes Byte format 8-bit binary, hexadecimal -9, A-F 2 hexadecimal characters contained in each 8-bit field of the message 4 bytes (32 bits) per parameter. Floating point format ( to IEEE 754) Most significant byte first (Alternative least significant byte first) 2 byte Cyclical Redundancy Check () start bit, 8 data bits, least significant bit sent first bit for even/odd parity stop bit if parity is used; or 2 bits if no parity Communication Baud Rate is user selectable from the front panel between 24, 48, 96, 92 bps. Function code : 3 Read Holding Registers Read content of read /write location ( 4X ) 4 Read input Registers Read content of read only location ( 3X ) 6 Presets Multiple Registers Set the content of read / write locations ( 4X ) Response: Volt (239.6V) (Hex) 43 (Hex) 6E (Hex) E9 (Hex) 7B (Hex) 8D (Hex) Device Function Code Byte Count Data Register High Byte Data Register Low Byte Data Register2 High Byte Byte Count : Total number of data bytes received. Data register High Byte : Most significant 8 bits of Data register of the parameter requested. Data register Low Byte : Least significant 8 bits of Data register of the parameter requested. Data register 2 High Byte : Most significant 8 bits of Data register 2 of the parameter requested. Data register 2 Low Byte : Least significant 8 bits of Data register 2 of the parameter requested. (Note : Two consecutive 6 bit register represent one parameter.) Table 4 : 3 X register addresses (measured parameters) Data Register2 Low Byte Parameter Parameter Modbus Start Hex (Register) No. 3 Volts W C 39 VA VAR PF E Phase Angle Freq Wh Vah 5 Note : Active Energy reading received will be in Watt Hours. Note : Apparent Energy reading received will be in VA Hours. Accessing 4 X register for Reading & Writing : Low Each setting is held in the 4X registers.modbus code 3 is used to read the current setting and code 6 is used to write/change the setting. Refer Table 5 for 4 X Register addresses. AE (Hex) High Response: PT Secondary 239.6V Device Byte Count Data Register High Byte Data RegisterLow Byte Data Register2 High Byte Data Register2 Low Byte Low High Byte Count : Total number of data bytes received. Data register High Byte : Most significant 8 bits of Data register of the parameter requested. Data register Low Byte : Least significant 8 bits of Data register of the parameter requested. Data register 2 High Byte : Most significant 8 bits of Data register 2 of the parameter requested. Data register 2 Low Byte : Least significant 8 bits of Data register 2 of the parameter requested. (Note : Two consecutive 6 bit register represent one parameter.) (Hex) 3 (Hex) 43 (Hex) 6F (Hex) 99 (Hex) 9A (Hex) 35 (Hex) 9 (Hex) Byte Count : Total number of data bytes to be transmitted. Data register High Byte : Most significant 8 bits of Data register of the parameter requested. Data register Low Byte : Least significant 8 bits of Data register of the parameter requested. Data register 2 High Byte : Most significant 8 bits of Data register 2 of the parameter requested. Data register 2 Low Byte : Least significant 8 bits of Data register 2 of the parameter requested. (Note : Two consecutive 6 bit register represent one parameter.) Response: Device Start High Start Low Low High (Hex) (Hex) 2C (Hex) (Hex) 8 (Hex) (Hex) Start High : Most significant 8 bits of starting address of the parameter requested. Start low :Least significant 8 bits of starting address of the parameter requested. (Note : Two consecutive 6 bit register represent one parameter.) Exception Cases : An exception code will be generated when meter receives ModBus query with valid parity & error check but which contains some other error ( e.g. Attempt to set floating point variable to an invalid value ) The response generated will be Function code ORed with HEX (8H ). The exception codes are listed below Illegal function The function code is not supported by meter. Example : Reading PT Secondary System type : Start address= 2C (Hex) Number of registers = Note :Number of registers = Number of Parameters x 2 Query : Example : Writing PT Secondary System type : Start address= 2C(Hex) Number of registers = Illegal Data 3 Illegal Data Value Attempt to access an invalid address or an attempt to read or write part of a floating point value Attempt to set a floating point variable to an invalid value Accessing 3 X register for reading measured values: Two consecutive 6 bit registers represent one parameter. Refer table 4 for the addresses of 3X registers (Parameters measured by the instruments). Each parameter is held in the 3X registers. Modbus Code 4 is used to access all parameters. Example : To read parameter, Volts : Start address= (Hex) Number of registers = Note : Number of registers = Number of parameters x 2 Each Query for reading the data must be restricted to 2 parameters or less. Exceeding the 2 parameter limit will cause a ModBus exception code to be returned. Query : (Hex) (Hex) (Hex) 7 (Hex) CB (Hex) Device Function Code Start High Start Low Number of Registers Hi Number of Registers Lo Low High Device Start High Start Low Low High (Hex) 3 (Hex) 2C (Hex) 5 (Hex) C2 (Hex) Start High : Most significant 8 bits of starting address of the parameter requested. Start low :Least significant 8 bits of starting address of the parameter requested. (Note : Two consecutive 6 bit register represent one parameter.) Query:( Set PT Secondary = 239.6V). Device Starting Hi Starting Lo Byte Count Data Register-High Byte Data Register- Low Byte Data Register-2 High Byte Data Register-2 Low Byte Low High (Hex) (Hex) 2C (Hex) (Hex) 43 (Hex) 6F (Hex) 99 (Hex) 9A (Hex) 3E (Hex) 4 (Hex) Table 5 : 4 X register addresses Parameter Parameter Read / Write Modbus Start Hex (Register) No Energy Display on Modbus Sys R Sys R Pulse Width C 45 6 Energy Reset Wp E RS 485 Set-up Code Node Pulse Divisor PT Primary CT Primary System Power R Energy Digit Rollover(reset) count Register Order/Word Order PT Secondary 2C 47 7 Password R/W 46 Start High : Most significant 8 bits of starting address of the parameter requested. Start low :Least significant 8 bits of starting address of the parameter requested. (Note : Two consecutive 6 bit register represent one parameter.) 7 8
5 Explanation for 4 X register : Parameter Description System 49 System 4-43 Pulse Width of Relay 45 Reset Energy Counter Rs485 Set-up Code This address is read only and displays System This address is read only and displays System - This address is used to set pulse width of the Pulse output. Write one of the following values to this address: 6 : 6 ms : ms 2 : 2 ms Writing any other value will return error. This address is used to reset the Energy Counter. Write zero value to this register to reset the energy counter. Writing any other value will return an error. This address is used to set the baud rate, Parity, Number of stop bits. Refer to Table 6 for details. 42 Node This register address is used to set Device address between to Pulse Divisor This address is used to set pulse divisor of the Pulse output. Write one of the following values to this address: : Divisor : Divisor : Divisor : Divisor & in KWh and MWh divisor will be by default. Writing any other value will return an error. 433 PT Primary This address allows the user to set PT Primary value. The maximum settable value is 4kV & also depends on the per phase MVA Restriction of power combined with CT primary. PT primary value should be in terms of voltage for example to set 2kV send 2V. 435 CT Pimary This address allows the user to set CT Primary value. The maximum settable value is 9999 & also depends on the per phase MVA Restriction of power combined with PT primary 437 Sys Power System Power (Read Only) is the Nominal system power based on the values of Nominal system volts and Nominal system current Energy display on Modbus Energy digit Rollover(Reset) Count Word Order PT secondary This address is used to set energy display on modbus in Wh,KWh & MWh. Write one of the following value to this address. = Energy in Wh. 2 = Energy in KWh. 3 = Energy in MWh. This address is used to setting maximum energy count after which energy will rollback to zero depends upon setting of Wh,KWh, & MWh. If Energy display on modbus in Wh count will be set in between 7 to 4 or In KWh set in between 7 to 2 & In MWh set in Word Order controls the order in which meter receives or sends floating - point numbers:- normal or reversed register order. In normal mode, the two registers that make up a floating point numbers are sent most significant bytes first. In reversed register mode, the two registers that make up a floating point numbers are sent least significant bytes first. To set the mode, write the value 24. into this registerthe instrument will detect the order used to send this value and set that order for all ModBus transaction involving floating point numbers. This address is used to read and write the PT secondary value. Ref Table for the range of PT secondary settable values in Section Password This address is used to set & reset the password. Valid Range of Password can be set is ) If password lock is present & if this location is read it will return zero. 2) If Password lock is absent & if this location is read it will return One. 3) If password lock is present & to disable this lock first send valid password to this location then write to this location 4) If password lock is present & to modify 4X parameter first send valid password to this location so that 4X parameter will be accessible for modification. 5) If for in any of the above case invalid password is send then meter will return exceptional error 2. Table 6 : RS 485 Set-up Code Baud Rate Parity Stop Bit Decimal value 92 NONE 92 NONE 92 EVEN 92 ODD 96 NONE 96 NONE 96 EVEN 96 ODD 48 NONE 48 NONE 48 EVEN 48 ODD 24 NONE 24 NONE 24 EVEN 24 ODD NOTE : Codes not listed in the table above may give rise to unpredictable results including loss of communication. Excise caution when attempting to change mode via direct Modbus writes. 6. User Assignable Modbus Registers: The meter contains the 2 user assignable registers in the address range of x2 (353) to x226 (355) (see Table 9). Any of the parameter addresses ( 3X register addresses Table 4)) accessible in the instrument can be mapped to these 2 user assignable registers. Parameters (3X registers addresses ) that resides in different locations may be accessed by the single request by re-mapping them to adjacent address in the user assignable registers area. The actual address of the parameters ( 3X registers addresses) which are to be assessed via address x2 to x226 are specified in 4x Register x2 to x23 (see Table ). Table 9 : User Assignable 3X Data Registers Parameter Modbus Start (Hex) (Register) Number. Assignable Register Assignable Reg Assignable Reg Assignable Reg Assignable Reg Assignable Reg Assignable Reg 6 A Assignable Reg 7 C Assignable Reg 8 E Assignable Reg Assignable Reg Assignable Reg Assignable Reg Assignable Reg Assignable Reg 4 A Assignable Reg 5 C Assignable Reg 6 E Assignable Reg Assignable Reg Assignable Reg Assignable Reg 2 26 Table : User Assignable mapping register ( 4X registers) Parameter Modbus Start (Hex) (Register) Number. Mapping Register Mapped Add for register #x Mapped Add for register #x Mapped Add for register #x Mapped Add for register #x Mapped Add for register #x Mapped Add for register #xa Mapped Add for register #xc Mapped Add for register #xe Mapped Add for register #x Mapped Add for register #x Mapped Add for register #x4 A Mapped Add for register #x6 B Mapped Add for register #x8 C Mapped Add for register #xa D Mapped Add for register #xc E Mapped Add for register #xe F Mapped Add for register #x Mapped Add for register #x Mapped Add for register #x Mapped Add for register #x26 3 Example : Assigning parameter to user assignable registers To access the voltage (3X address x) and (3X address xe) through user assignable register assign these addresses to 4x register (Table ) x and x respectively. Assigning Query: Device Starting Hi Starting Lo Byte Count Data Register-High Byte Data Register- Low Byte Data Register-2 High Byte Data Register-2 Low Byte Low High (Hex) (Hex) * (Hex)* E (Hex) 6A (Hex) C7 (Hex) } } * (3X x) * (3X xe) * Note : Parameters should be assigned in Multiple of two i.e. 2,4,6, Response : Device Start High Start Low Low (Hex) (Hex) 4 (Hex) Reading Parameter data through User Assignable Registers: In assigning query and parameters were assigned to x 2 and x2(table) which will point to user assignable 3xregisters x2 and x2 (table9). So to read and PowerFactor data reading query should be as below. Query: Device Start High Start Low Low High (Hex) ** F (Hex) 7 (Hex) Start High : Most significant 8 bits of starting address of User assignable register. Start low :Least significant 8 bits of starting address of User assignable register. (Starting ) **Note : Two consecutive 6 bit register represent one parameter. Since two parameters are requested four registers are required Response : (Volt2 = 29.3 / =.) x2 x2 x2 x23 x22 x23 Device Byte count Data Register-High Byte Data Register- Low Byte Data Register-2 High Byte Data Register-2 Low Byte Data Register-3 High Byte Data Register-3 Low Byte Data Register-4 High Byte Data Register-4 Low Byte Low High User Assignable mapping Registers ( 4X Registers Table ) (x) (xe) Wh Import (x48) Frequency (x46) (x6) VAh (x5) (Hex) 8 (Hex) 43 (Hex) 5B (Hex) 4E (Hex) 3F (Hex) 8 (Hex) 79 (Hex) 3F (Hex) (Starting ) x2 x2 x24 x26 x224 x226 } Data } Data User Assignable Data Registers ( 3X Registers Table 9 ) x2 (6 bit) x2 (6 bit) x24 (6 bit) x26 (6 bit) x224 (6 bit) x226 (6 bit) x2 (6 bit) x23 (6 bit) x25 (6 bit) x27 (6 bit) x225 (6 bit) x227 (6 bit) High 7 (Hex) To get the data through User assignable Register use following steps: ) Assign starting addresses(table3) of parameters of interest to a User assignable mapping registers in a sequence in which they are to be accessed (see section Assigning parameter to user assignable registers ) 9 2) Once the parameters are mapped data can be acquired by using User assignable data register Starting address. i.e to access data of, Power factor,wh import, Frequency send query with starting address x2 with number of register 8 or individually parameters can be accessed for example if current to be accessed use starting address x22. (See section Reading Parameter data through User Assignable Registers)
6 7. Phaser Diagram : Capacitive Inductive 8. EMC Installation Requirements This product has been designed to meet the certification of the EU directives when installed to a good code of practice for EMC in industrial environments, e.g.. Screened output and low signal input leads or have provision for fitting RF suppression components, such as ferrite absorbers, line filters etc., in the event that RF fields cause problems.. Specification : System Phase 2 Wire (Single Phase) Inputs Nominal input voltage 57.7 V L-N to 277VL-N Nominal range of use of influence quantities for measurands Input frequency Temperature Auxiliary supply voltage % of Rated Value.. 2 % of Rated Value Rated Value + % to 5 C Rated Value + % Inductive Connections Quadrant Sign of Active Power ( P ) Sign of Sign of Reactive Power Power ( Q ) Factor ( PF ) Inductive / Capacitive Import + P + Q + L Import 4 + P - Q + C Export 2 - P + Q - C Export 3 - P - Q - L Inductive means lags Capacitive means leads Note : Though meter displays Active power ( P )with + ( Positive sign ) or - ( negative sign ) depending on External CT Connection, Energy ( ) integration will be in done same register irrespective of Import or Export connection Capacitive Note: It is good practice to install sensitive electronic instruments that are performing critical functions, in EMC enclosures that protect against electrical interference which could cause a disturbance in function. 2. Avoid routing leads alongside cables and products that are, or could be, a source of interference. 3. To protect the product against permanent damage, surge transients must be limited to 2kV pk. It is good EMC practice to suppress differential surges to 2kV at the source. The unit has been designed to automatically recover in the event of a high level of transients. In extreme circumstances it may be necessary to temporarily disconnect the auxiliary supply for a period of greater than 5 seconds to restore correct operation. The inputs of these products are designed for connection in to systems via Transformers only, where one side is grounded. 4. ESD precautions must be taken at all times when handling this product. 8.2 Case Dimension and Panel Cut Out mm mm FRONT DISPLAY AREA 3.5 8mm mm PANEL CUTOUT mm Max continuous input voltage Max short duration input voltage Nominal input voltage burden Nominal input current Starting Max continuous input current Nominal input current burden System CT primary values 2% of Rated Value 2 x Rated Value (s application repeated times at s intervals).2va approx. per phase A OR 5A AC rms 2% of Rated Value.6VA approx. per phase Max short duration current input 2 x Rated Value (s application repeated 5 times at 5 min. intervals) Auxiliary Standard nominal Auxillary supply voltages & Frequency a.c. supply voltage tolerance a.c. supply frequency range a.c. supply burden.4% of Nominal Input Std. Values upto 4kA ( or 5 Amp secondaries) V AC/5 Hz, 23V AC/5 Hz,38V AC/5 Hz, - 25V AC- DC, 2-48V DC +2 % / -5 % of Rated Value 45 to 66 Hz 4.5VA Auxiliary supply frequency Temperature Coefficient (For Rated value range of use... 5 C ) Error change due to variation of an influence quantity Display LED Update Impulse LED Controls User Interface Standards EMC Immunity Safety IP for water & dust Rated Value + %.5% / C for (5..2% of Rated Value).5% / C for (..2% of Rated Value ) 2 * Error allowed for the reference condition applied in the test. digits. Approx. seconds Impulse Rate 36 impulses/ Two push buttons IEC 6326 V/m min-level 3 industrial low level electromagnetic radiation environment IEC IEC 6-, Year 2 IEC Installation Mounting is by four side clamps, slide the side clamps through side slot till side clamp gets firmly locked in a groove (Refer fig.) Consideration should be given to the space required behind the instrument to allow for bends in the connection cables. PANEL SLIDE IN THIS DIRECTION AND LOCK MAX PANEL THICKNESS.8,5mm 8.3 Wiring Input connections are made directly to screw-type terminals with indirect wire pressure. Numbering is clearly marked in the plastic moulding. Choice of cable should meet local regulations. Terminal for both and 2 inputs will accept upto 3mm x 2 diameter cables. Note : It is recommended to use wire with lug for connection with meter. d.c. supply burden Operating Measuring Ranges Frequency 3W % of Rated Value % of Rated Value Hz.5 Lag Lead Isolation Dielectric voltage withstand test between circuits and accessible surfaces Environmental Operating temperature Storage temperature Relative humidity Warm up time 2.2 kv RMS 5 Hz for minute between all electrical circuits - to 55 C -2 to +65 C.. 9 % RH 3 minute (minimum) Shock 5g in 3 planes Front As the front of the enclosure conforms to IP54 it is protected from water spray from all directions, additional protection to the panel may be obtained by the use of an optional panel gasket. The terminals at the rear of the product should be protected from liquids. The meter should be mounted in a reasonably stable ambient temperature and where the operating temperature is within the range - to 55 C. Vibration should be kept to a minimum and the product should not be mounted where it will be subjected to excessive direct sunlight. Caution. In the interest of safety and functionality this product must be installed by a qualified engineer, abiding by any local regulations. 2. s dangerous to human life are present at some of the terminal connections of this unit. Ensure that all supplies are de-energised before attempting any connection or disconnection. 3. These products do not have internal fuses therefore external fuses must be used to ensure safety under fault conditions. 8.4 Auxiliary Supply Meter should ideally be powered from a dedicated supply, however it may be powered from the signal source, provided the source remains within the limits of the chosen auxiliary voltage. 8.5 Fusing It is recommended that all voltage lines are fitted with amp HRC fuses. 8.6 Earth/Ground Connections For safety reasons, CT secondary connections should be grounded in accordance with local regulations. 9. Connection Diagram 9. Network Wiring L Single Phase DIGITAL METERING SYSTEM P S + - L N AUX SUPPLY L O AD Accuracy Frequency Active Power Re- Active Power Apparent Power Angle Class. : +.5 % of range ( 5... % of Rated Value ) +.5 % of range (... % of Rated Value ).5% of mid frequency +.5 % of range (... % of Rated Value ) +.5 % of range (... % of Rated Value ) +.5 % of range (... % of Rated Value ) + % of Unity + % of range Active Energy + % as per IEC Active P.F. (.5 lag lead) Apparant Energy + % Class.5 (optional) : Active Energy +.5 % as per IEC Active P.F. (.5 lag lead) Apparant Energy +.5 % Reference conditions for Accuracy : Reference temperature Input frequency 23 C + 2 C 5 or 6Hz + 2% Input waveform Sinusoidal (distortion factor.5) Auxiliary supply voltage Rated Value + % Auxiliary supply frequency Rated Value + %.5 lag lead Vibration Enclosure ( front only ) Enclosure Style Material Terminals Depth Weight ModBus ( RS 485 ) Option : Protocol Baud Rate Parity.. 55 Hz,.5mm amplitude IP 54 as per IEC mm x 96mm DIN Quadratic Polycarbonate Housing, Self extinguish & non dripping as per UL 94 V- Screw-type terminals < 8 mm.62 kg Approx. ModBus ( RS 485 ) 92, 96, 48 or 24 ( Programmable ) Odd or Even, with stop bit, Or None with or 2 stop bits N 2
7 . Connection for Optional Pulse Output / RS 485 Notes :. One Pulse Output & RS Pulse out NO NC COM RS 485 B A G RS 485 Output RS 485 B A G One Pulse Output Pulse out NO NC COM The Information contained in these installation instructions is for use only by installers trained to make electrical power installations and is intended to describe the correct method of installation for this product. However, organization has no control over the field conditions which influence product installation. It is the user's responsibility to determine the suitability of the installation method in the user's field conditions. Organization only obligations are those in organization standard Conditions of Sale for this product and in no case will organization be liable for any other incidental, indirect or consequential damages arising from the use or misuse of the products. 3
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