Eaton PM3 Instruction Leaflet

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13Instruction Leaflet IL012002ENEffective March 2013Instruction Leaflet for Modbus Power Monitoring/Metering Module (PM3) for FD, JG, and KD/LGCircuit Breakers and Motor Circuit ProtectorsEATON CORPORATION www.eaton.comIf the Breaker Status cannot be determined (for example, the con-nector is not connected), an exception (0x82) code of 0x01 isreturned. The response will look like (see Table 14).Table 14. Breaker Status Unknown.Response From SlaveField NameSlave Address 0x74Function Code 0x82Exception Error 0x01CRC Low Byte 0x81CRC High Byte 0x605.3. Metered ValuesThe PM3 Modbus Add-on Module communicates metered valuesvia input registers (Function Code 04). Registers are referenced byregister numbers and register addresses. Register numbers rangefrom 1 to 65536. Register addresses range from 0 to 65535. Thus,a data value referenced with number N has an address of (N – 1).Each register contains two bytes.The data field in the request from the Modbus Master contains thestarting register address and the number of registers to read. Atypical Request/Response transaction for reading metered values isshown in Table 15. This example shows a read of register numbers6147 thru 6152 (IA thru IC) from a slave at address 116.Table 15. Request From Master.Field NameSlave Address 0x74Function Code 0x04Starting Address High Byte 0x18Starting Address Low Byte 0x02Number of Registers High Byte 0x00Number of Registers Low Byte 0x06CRC Low ByteCRC High ByteTable 16. Response From Slave.Field NameSlave Address 0x74Function Code 0x04Byte Count 0x0CData From Register 0x1802 High ByteData From Register 0x1802 Low ByteData From Register 0x1803 High ByteData From Register 0x1803 Low ByteData From Register 0x1804 High ByteData From Register 0x1804 Low ByteData From Register 0x1805 High ByteData From Register 0x1805 Low ByteData From Register 0x1806 High ByteData From Register 0x1806 Low ByteData From Register 0x1807 High ByteData From Register 0x1807 Low ByteCRC Low ByteCRC High Byte5.4. Standard Metered ValuesStandard metered values are transmitted as 32-bit numbers.Metered values are read-only and are transmitted in two registers.Both registers must be accessed in one operation, using FunctionCode 04.ote:N The arrangement of the bytes in the 4-byte standard meter registervalues may be configured by writing to configuration register number 2003(register address 0x07D2).Table 17 summarizes the Modbus commands for the standardmetered values.Table 17. Standard Metered Values Command Descriptions.Name UnitsRegisterNumber(decimal)RegisterAddress(hex) Scalefactor FormatIA A 6147 1802 10 Uint32IB A 6149 1804 10 Uint32IC A 6151 1806 10 Uint32VAB V 6159 180E 10 Uint32VBC V 6161 1810 10 Uint32VCA V 6163 1812 10 Uint32VAN V 6167 1816 10 Uint32VBN V 6169 1818 10 Uint32VCN V 6171 181A 10 Uint32Real Power – 3 Phase W 6187 182A 1 Int32Reactive Power – 3phase VAR 6189 182C 1 Uint32Apparent Power – 3phase VA 6191 182E 1 Uint32Apparent Power Factor % 6195 1832 100 Int32Frequency Hz 6197 1834 10 Uint32Phase A Real Power W 6203 183A 1 Int32Phase B Real Power W 6205 183C 1 Int32Phase C Real Power W 6207 183E 1 Int32Phase A Reactive Power VAR 6209 1840 1 Int32Phase B Reactive Power VAR 6211 1842 1 Int32Phase C Reactive Power VAR 6213 1844 1 Int32Phase A ApparentPower VA 6215 1846 1 Int32Phase B ApparentPower VA 6217 1848 1 Uint32Phase C ApparentPower VA 6219 184A 1 Uint32Phase A ApparentPower Factor % 6227 1852 100 Uint32Phase B ApparentPower Factor % 6229 1854 100 Uint32Phase C ApparentPower Factor % 6231 1856 100 Uint325.5. Energy ValuesEnergy values are 32-bit numbers. Each energy value requires fourModbus registers. When reading an energy value, all four registersmust be read in one operation.ote:N The arrangement of the bytes in the 4-byte energy register valuesmay be configured by writing to configuration register number 2003 (registeraddress 0x07D2).Table 18 summarizes the Modbus commands for the energy values.