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Eastron SDM530-MT User Manual

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Exported reactive energy in kVArh

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Example:1st,Jan,2000

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Summary of Contents for SDM530-MT

Page 1: ...ction DIN rail meter Measures kWh Kvarh KW Kvar KVA P F PF Hz dmd V A etc Bi directional measurement IMP EXP Two pulse outputs RS485 Modbus Din rail mounting 35mm 100A direct connection 4 tariffs 10 time segments Better than Class 1 B accuracy USER MANUAL 2015 V1 5 ...

Page 2: ...ine voltage Line Frequency Currents Current demands Power maximum power demand and power factor Active energy imported and exported Reactive energy imported and exported The unit has password protected set up screens for Changing password Demand Interval Time DIT Reset for demand measurements Pulse output duration Two pulse output indicates real time energy measurement An RS485 output allows remot...

Page 3: ...elf test and indicates the result if the test passes After 5 seconds delay the screen will display active energy measurements Measurements The buttons operate as follows 1 Select the Voltage and Current display screens In Set up Mode this is the Up or back button 2 Select the Power Frequency and Power factor display screens In Set up Mode this is the Down button 3 Select the Energy display screens...

Page 4: ...al 4 Voltage and Current and Max Demand Each successive pressing of the button selects a new range 1 1 Phase to neutral voltages 1 2 Phase to neutral voltages 2 1 Current on each phase 2 2 Neutral current 3 Maximum Current Demand ...

Page 5: ...Active Power in kW When it s exported there will be a mark of minus 1 2 Instantaneous Reactive Power in kVAr When it s exported there will be a mark of minus 1 3 Instantaneous Volt amps in KVA When it s exported there will be a mark of minus 1 4 Total kW kVArh kVA When it s exported there will be a mark of minus 2 Frequency and Power Factor total ...

Page 6: ...ximum Power Demand Energy Measurements Each successive short pressing lasting less than 3s of the button selects a new range 1 1 Total active energy in kWh Total kWh imported exported kWh 1 2 Total Imported active energy in kWh 1 3 Total Exported active energy in kWh ...

Page 7: ...Manual 7 2 1 Tariff 1 Active energy 2 2 Tariff 2 Active energy 2 3 Tariff 3 Active energy 2 4 Tariff 4 Active energy 3 1 Total reactive energy in kVArh Total kVArh imported exported kVArh 3 2 Imported reactive energy in kVArh ...

Page 8: ... SDM530 MT User Manual 8 3 3 Exported reactive energy in kVArh 4 1 Tariff 1 Reactive energy 4 2 Tariff 2 Reactive energy 4 3 Tariff 3 Reactive energy 4 4 Tariff 4 Reactive energy 5 1 Date Example 1st Jan 2000 ...

Page 9: ...If an incorrect password is entered the display will show Err To exit setting up mode press repeatedly until the measurement screen is restored Menu Option Selection 1 Use the and buttons to select the required item from the menu 2 Press to confirm your selection 3 If an item flashes then it can be adjusted by the and buttons If not there maybe a further layer 4 Having selected an option from the ...

Page 10: ...rticular on entry to the setting up section a password must be entered Digits are set individually from left to right The procedure is as follows 1 The current digit to be set flashes and is set using the and buttons 2 Press to confirm each digit setting The SET indicator appears after the last digit has been set 3 After setting the last digit press to exit the number setting routine The SET indic...

Page 11: ...g routine and return to the Set up menu SET will be removed DIT Demand Integration Time This sets the period in minutes over which the current and power readings are integrated for maximum demand measurement The options are 1 5 8 10 15 30 60 minutes 1 From the set up menu use and buttons to select the DIT option The screen will show the currently selected integration time Default is 60 2 1 Press t...

Page 12: ...es from the last time operation on the meter 2 Press to enter the selection routine The current time interval will flash The options can be 0 10 30 60 120 0 means always on Default lasting time is 60minutes Use and buttons to select the time required Press to confirm the set up Pulse output This option allows you to configure the pulse output 1 The output can be set to provide a pulse for a define...

Page 13: ...and buttons to choose kWh or kVArh Default is kwh On completion of the entry procedure press to confirm the setting and press to return to the main set up menu Pulse rate Use this to set the energy represented by each pulse Rate can be set to 1 pulse per DFt 0 1 1 10 100kWh kVArh It shows 1 impulse 0 01kWh kVArh 1 From the Set up menu use and buttons to select the Pulse Rate option ...

Page 14: ...up menu Pulse Duration The energy monitored can be active or reactive and the pulse width can be selected as 200 100 default or 60ms It shows pulse width of 100ms 1 1 From the Set up menu use and buttons to select the Pulse width option 1 2 Press to enter the selection routine The current setting will flash Default is 100 Use and buttons to choose pulse width On completion of the entry procedure p...

Page 15: ...On completion of the entry procedure press to confirm the setting and press to return to the main set up menu To activate the scroll display mode press the lasting for 2seconds on the main interface To close it press button lasting for 2seconds accordingly The default status of scroll display is closed Communication There is a RS485 port can be used for communication using Modbus RTU protocol RS48...

Page 16: ...01 to 247 Default is 001 On completion of the entry procedure press button to confirm the setting and press button to return the main set up menu Baud Rate 1 From the Set up menu use and buttons to select the Baud Rate option 2 1 Press to enter the selection routine The current setting will flash 2 2 Use and buttons to choose Baud rate 1 2K 2 4k 4 8k 9 6k default ...

Page 17: ...u use and buttons to select the Parity option 2 1 Press to enter the selection routine The current setting will flash 2 2 Use and buttons to choose Parity EVEN ODD NONE Default is NONE On completion of the entry procedure press to confirm the setting and press to return to the main set up menu Stop bits 1 From the Set up menu use and buttons to select the Stop Bit option ...

Page 18: ...etting and press to return to the main set up menu Note Default is 1 and only when the parity is NONE that the stop bit can be changed to 2 CLR The meter provides a function to reset the maximum demand value of current and power 1 From the Set up menu use and buttons to select the reset option 2 Press to enter the selection routine The MD will flash Press to confirm the setting and press to return...

Page 19: ...99 kVArh Exported reactive energy 0 to 999999 99 kVArh Total active energy 0 to 999999 99 kWh Total reactive energy 0 to 999999 99 kVArh Accuracy Voltage 0 5 of range maximum Current 0 5 of nominal Frequency 0 2 of mid frequency Power factor 1 of unity 0 01 Active power W 1 of range maximum Reactive power VAr 1 of range maximum Apparent power VA 1 of range maximum Active energy Wh Class 1 IEC 6205...

Page 20: ... parameters can be configured from the Set up menu Baud rate 1200 2400 4800 9600 Parity none default odd even Stop bits 1 or 2 RS485 network address nnn 3 digit number 001 to 247 Reference Conditions of Influence Quantities Influence Quantities are variables that affect measurement errors to a minor degree Accuracy is verified under nominal value within the specified tolerance of these conditions ...

Page 21: ...Eastron SDM530 MT User Manual 21 Wiring diagram ...

Page 22: ...her Line topology may or may not require terminating loads depending on the type and length of cable used Loop ring topology does not require any termination load 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 120 ohm 0 25 Watt min resistor A total maximum length of 3900 feet 1200 meter...

Page 23: ...icular wiring system Any parameter with a cross X will return the value zero Each parameter is held in the 3X registers Modbus Protocol function code 04 is used to access all parameters For example to request Amps 1 Start address 0006 No of registers 0002 Amps 2 Start address 0008 No of registers 0002 Each request for data must be restricted to 40 parameters or less Exceeding the 40 parameter limi...

Page 24: ...h 00 4A 30077 Import VArh since last reset 2 kVArh MVArh 00 4C 30079 Export VArh since last reset 2 kVArh MVArh 00 4E 30081 VAh since last reset 2 kVAh MVAh 00 50 30083 Ah since last reset 3 Ah kAh 00 52 30085 Total system power demand 4 W 00 54 30087 Maximum total system power demand 4 VA 00 56 30101 Total system VA demand VA 00 64 30103 Maximum total system VA demand VA 00 66 30105 Neutral curre...

Page 25: ...otalLast9monthEnergy Total Rate1 Rate2 Rate3 Rate4 KWh 02 91 30674 TotalLast10monthEnergy Total Rate1 Rate2 Rate3 Rate4 KWh 02 A1 30690 TotalLast11monthEnergy Total Rate1 Rate2 Rate3 Rate4 KWh 02 B1 30706 TotalLast12monthEnergy Total Rate1 Rate2 Rate3 Rate4 KWh 02 C1 30770 Total Current Kvarh Total Rate1 Rate2 Rate3 Rate4 Kvarh 03 01 30786 Current positive Energy Total Rate1 Rate2 Rate3 Rate4 Kvar...

Page 26: ...ate3 Rate4 kWh F1 A1 361874 Last 11 month positive Energy Total Rate1 Rate2 Rate3 Rate4 kWh F1 B1 361890 Last 12 month positive Energy Total Rate1 Rate2 Rate3 Rate4 kWh F1 C1 361954 Current month reverse Energy Total Rate1 Rate2 Rate3 Rate4 Kwh F2 01 361970 Last 1 month reverse Energy Total Rate1 Rate2 Rate3 Rate4 Kwh F2 11 361986 Last 2 month reverse Energy Total Rate1 Rate2 Rate3 Rate4 Kwh F2 21...

Page 27: ...e4 KW F3 71 362338 Last 8 month positive max Demand Total Rate1 Rate2 Rate3 Rate4 KW F3 81 362354 Last 9 month positive max Demand Total Rate1 Rate2 Rate3 Rate4 KW F3 91 362370 Last 10 month positive max Demand Total Rate1 Rate2 Rate3 Rate4 KW F3 A1 362386 Last 11 month positive max Demand Total Rate1 Rate2 Rate3 Rate4 KW F3 B1 362402 Last 12 month positive max Demand Total Rate1 Rate2 Rate3 Rate4...

Page 28: ...e4 MM DD HH mm BCD F5 31 362786 Time of max demand in Last 3 month Total Rate1 Rate2 Rate3 Rate4 MM DD HH mm BCD F5 41 362802 Time of max demand in Last 4 month Total Rate1 Rate2 Rate3 Rate4 MM DD HH mm BCD F5 51 362818 Time of max demand in Last 5 month Total Rate1 Rate2 Rate3 Rate4 MM DD HH mm BCD F5 61 362834 Time of max demand in Last 6 month Total Rate1 Rate2 Rate3 Rate4 MM DD HH mm BCD F5 71...

Page 29: ...on Code 03 is used to read the parameter and Function Code 16 is used to write Write to only one parameter per message 1 3 1 SDM530 MT MODBUS Protocol Holding Register Parameters Address Register Parameter Modbus Protocol Start Address Hex Valid range Mode High Byte Low Byte 40001 Demand Time 00 00 Read minutes into first demand calculation When the Demand Time reaches the Demand Period then the d...

Page 30: ...1kwh imp 4 10kwh imp 5 100kwh imp r w 40025 Password 00 18 Write password for access to protected registers r w 40029 Network Baud Rate 00 1C Write the network port baud rate for MODBUS Protocol where Write the network port baud rate for MODBUS Protocol where 0 2400 baud 1 4800 baud 2 9600 baud default 5 1200 baud r w 40037 System Power 00 24 Read the total system power e g for 3p4w returns System...

Page 31: ...ined from either the EIA or the various RS485 device manufacturers for example Texas Instruments or Maxim Semiconductors This list is not exhaustive 2 1 Half Duplex Half duplex is a system in which one or more transmitters talkers can communicate with one or more receivers listeners with only one transmitter being active at any one time For example a conversation is started by asking a question th...

Page 32: ...ould be connected together using the other conductor in the pair The cable screen should be connected to the Gnd terminals A Belden 9841 Single pair or 9842 Two pair or similar cable with a characteristic impedance of 120 ohms is recommended The cable should be terminated at each end with a 120 ohm quarter watt or greater resistor Note Diagram shows wiring topology only Always follow terminal iden...

Page 33: ...s or less Violating this requirement will impact the performance of the instrument and may result in a response time in excess of the specification Check that the MODBUS Protocol mode RTU or ASCII and serial parameters baud rate number of data bits number of stop bits and parity are the same for all devices on the network Check that the master is requesting floating point variables pairs of regist...

Page 34: ...gisters Query The following example illustrates a request for a single floating point parameter i e two 16 bit Modbus Protocol Registers First Byte Last Byte Slave Address Function Code Start Address Hi Start Address Lo Number of Points Hi Number of Points Lo Number of Points Lo Error Check Lo Error Check Hi Slave Address 8 bit value representing the slave being addressed 1 to 247 0 is reserved fo...

Page 35: ...senting the first register requested in the query Second Register Hi The top most significant eight bits of a 16 bit number representing the second register requested in the query Second Register Lo The bottom least significant eight bits of a 16 bit number representing the second register requested in the query Error Check Lo The bottom least significant eight bits of a 16 bit number representing...

Page 36: ... significant bit first User Option Of Parity No Parity and 2 Stop Bits And Stop Bits No Parity and 1 Stop Bit Even Parity and 1 Stop Bit Odd Parity and 1 Stop Bit User Option of Baud 2400 4800 9600 19200 38400 The baud rate parity and stop bits must be selected to match the master s settings 3 3 MODBUS Protocol Message Timing RTU Mode A MODBUS Protocol message has defined beginning and ending poin...

Page 37: ...Data Byte Parity Bit 1 Stop Bit 11 bits total Least Significant Bit LSB Most Significant Bit MSB Start 1 2 3 4 5 6 7 8 Party Stop Transmit Character Start Bit Data Byte 2 Stop Bits 11 bits total Start 1 2 3 4 5 6 7 8 Stop Stop Eastron Digital meters additionally support No parity One stop bit Transmit Character Start Bit Data Byte 1 Stop Bit 10 bits total Start 1 2 3 4 5 6 7 8 Stop The master is c...

Page 38: ... entire message The error check bytes must always be present to comply with the MODBUS Protocol there is no option to disable it The error check bytes represent a 16 bit binary value calculated by the transmitting device The receiving device must recalculate the CRC during receipt of the message and compare the calculated value to the value received in the error check bytes If the two values are n...

Page 39: ...e following function codes Code MODBUS Protocol name Description 03 Read Holding Registers Read the contents of read write location 4X references 04 Read Input Registers Read the contents of read only location 3X references 08 Diagnostics Only sub function zero is supported This returns the data element of the query unchanged 15 Pre set Multiple Registers Set the contents of read write location 4X...

Page 40: ...until the most significant bit of the mantissa is one In the special case where the number is zero both mantissa and exponent are zero The bits in an IEEE 754 format have the following significance Data Hi Reg Hi Byte Data Hi Reg Lo Byte Data Lo Reg Hi Byte Data Lo Reg Lo Byte SEEE EEEE EMMM MMMM MMMM MMMM MMMM MMMM Where S represents the sign bit where 1 is negative and 0 is positive E is the 8 b...

Page 41: ...position For example 11110000 represents 1 x 27 1 x 26 1x 25 1 x 24 0 x 23 0 x 22 0 x 21 0 x 20 240 Binary bits that are to the right of the binary point also represent a power of 2 corresponding to their position As the digits are to the right of the binary point the powers are negative For example 100 represents 1 x 2 1 0 x 2 2 0 x 2 3 which equals 0 5 Adding these two numbers together and makin...

Page 42: ...tents of Volts 1 as 230 2 But see also Exception Response later Field Name Example Hex Slave Address 01 Function 04 Byte Count 04 Data High Reg High Byte 43 Data High Reg Low Byte 66 Data Low Reg High Byte 33 Data Low Reg Low Byte 34 Error Check Low 1B Error Check High 38 3 9 Holding Registers 3 9 1 Read Holding Registers MODBUS Protocol code 03 reads the contents of the 4X registers Example The f...

Page 43: ... will set the Demand Period to 60 which effectively resets the Demand Time Field Name Example Hex Slave Address 01 Function 10 Starting Address High 00 Starting Address Low 02 Number of Registers High 00 Number of Registers Low 02 Byte Count 04 Data High Reg High Byte 42 Data High Reg Low Byte 70 Data Low Reg High Byte 00 Data Low Reg Low Byte 00 Error Check Low 67 Error Check High D5 Note Data mu...

Page 44: ...s the query then it will respond with an exception In this case a code 01 the requested function is not support by this slave Field Name Example Hex Slave Address 01 Function 10 OR 80 90 Exception Code 01 Error Check Low 8D Error Check High C0 3 11 Exception Codes 3 11 1 Table of Exception Codes Eastron Digital meters support the following function codes Exception Code MODBUS Protocol name Descrip...

Page 45: ...e Address 01 Function 08 Sub Function High 00 Sub Function Low 00 Data Byte 1 AA Data Byte 2 55 Error Check Low 5E Error Check High 94 Note Exactly one register of data two bytes must be sent with this function The following response indicates the correct reply to the query i e the same bytes as the query Field Name Example Hex Slave Address 01 Function 08 Sub Function High 00 Sub Function Low 00 ...

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