Power meters

Siemens SENTRON PAC3200 Modbus register map

Panel-mounted three-phase power monitoring device for low-voltage networks. It measures voltages, currents, power, power factor, frequency, harmonic distortion and tariff-based energy counters, and has a built-in Ethernet port.

Protocol
Modbus TCP (built-in Ethernet); Modbus RTU only with the optional RS485 expansion module
Defaults
Modbus TCP uses server port 502. The device ships set to the SEAbus TCP protocol and must be switched to Modbus TCP in the communication settings (p. 38).
Addresses in the manual
0-based protocol addresses, as sent on the wire
32 and 64-bit values
Not stated in the manual
Registers listed
86
Checked against
A5E01168664B-04, 02/2008 edition label as printed

Address base. The manual lists an offset per value (the first voltage is offset 1) and does not describe the wire encoding (p. 40). Siemens' S7-1200 application example (Entry ID 40614428, p. 26) passes 40001 plus the offset as the S7 MB_CLIENT address, for example 40001 + 65 = 40066 for total active power. In the S7 convention 40001 is holding register 0, so the offset is taken as the zero-based protocol address. Neither document states this wire encoding directly. Address 1 in the manual is address 1 on the wire.

Word order. The manual does not state the word or byte order of 32-bit and 64-bit values. Float values use 2 registers, double values 4 registers, and all values must be read or written starting at their own first register (p. 40).

Modbus Poll and the Modbus protocol itself count from 0. The "Wire address" column is the number to type into Modbus Poll.

Downloads

Register table (CSV) Modbus Poll blocks (CSV) Modbus Poll template (JSON)

The register table has every column on this page. The blocks file imports into Modbus Poll. The template JSON holds the same blocks plus unit, scale and access for scripts.

Registers

86 registers
Manual Wire Register Type Regs Unit Scale Access Area
1 1 Voltage phase A to neutralVoltage_L1N float32 2 V 1 R Holding (FC03)
3 3 Voltage phase B to neutralVoltage_L2N float32 2 V 1 R Holding (FC03)
5 5 Voltage phase C to neutralVoltage_L3N float32 2 V 1 R Holding (FC03)
7 7 Voltage phase A to BVoltage_L12 float32 2 V 1 R Holding (FC03)
9 9 Voltage phase B to CVoltage_L23 float32 2 V 1 R Holding (FC03)
11 11 Voltage phase C to AVoltage_L31 float32 2 V 1 R Holding (FC03)
13 13 Current phase ACurrent_L1 float32 2 A 1 R Holding (FC03)
15 15 Current phase BCurrent_L2 float32 2 A 1 R Holding (FC03)
17 17 Current phase CCurrent_L3 float32 2 A 1 R Holding (FC03)
19 19 Apparent power phase AApparentPower_L1 float32 2 VA 1 R Holding (FC03)
21 21 Apparent power phase BApparentPower_L2 float32 2 VA 1 R Holding (FC03)
23 23 Apparent power phase CApparentPower_L3 float32 2 VA 1 R Holding (FC03)
25 25 Active power phase AActivePower_L1 float32 2 W 1 R Holding (FC03)
27 27 Active power phase BActivePower_L2 float32 2 W 1 R Holding (FC03)
29 29 Active power phase CActivePower_L3 float32 2 W 1 R Holding (FC03)
31 31 Reactive power phase AReactivePower_L1 float32 2 var 1 R Holding (FC03)
33 33 Reactive power phase BReactivePower_L2 float32 2 var 1 R Holding (FC03)
35 35 Reactive power phase CReactivePower_L3 float32 2 var 1 R Holding (FC03)
37 37 Power factor phase APowerFactor_L1 · Range 0 to 1 as printed. float32 2 1 R Holding (FC03)
39 39 Power factor phase BPowerFactor_L2 · Range 0 to 1 as printed. float32 2 1 R Holding (FC03)
41 41 Power factor phase CPowerFactor_L3 · Range 0 to 1 as printed. float32 2 1 R Holding (FC03)
43 43 Voltage THD phase ATHD_Voltage_L1 float32 2 % 1 R Holding (FC03)
45 45 Voltage THD phase BTHD_Voltage_L2 float32 2 % 1 R Holding (FC03)
47 47 Voltage THD phase CTHD_Voltage_L3 float32 2 % 1 R Holding (FC03)
49 49 Current THD phase ATHD_Current_L1 float32 2 % 1 R Holding (FC03)
51 51 Current THD phase BTHD_Current_L2 float32 2 % 1 R Holding (FC03)
53 53 Current THD phase CTHD_Current_L3 float32 2 % 1 R Holding (FC03)
55 55 Line frequencyFrequency float32 2 Hz 1 R Holding (FC03)
57 57 Average phase to neutral voltageVoltageLN_Avg float32 2 V 1 R Holding (FC03)
59 59 Average phase to phase voltageVoltageLL_Avg float32 2 V 1 R Holding (FC03)
61 61 Average currentCurrent_Avg float32 2 A 1 R Holding (FC03)
63 63 Total apparent powerApparentPower_Total float32 2 VA 1 R Holding (FC03)
65 65 Total active powerActivePower_Total float32 2 W 1 R Holding (FC03)
67 67 Total reactive powerReactivePower_Total float32 2 var 1 R Holding (FC03)
69 69 Total power factorPowerFactor_Total float32 2 1 R Holding (FC03)
71 71 Voltage amplitude unbalanceVoltageUnbalance float32 2 % 1 R Holding (FC03)
73 73 Current amplitude unbalanceCurrentUnbalance float32 2 % 1 R Holding (FC03)
75 75 Maximum voltage phase A to neutralVoltageL1N_Max float32 2 V 1 R Holding (FC03)
87 87 Maximum current phase ACurrentL1_Max float32 2 A 1 R Holding (FC03)
89 89 Maximum current phase BCurrentL2_Max float32 2 A 1 R Holding (FC03)
91 91 Maximum current phase CCurrentL3_Max float32 2 A 1 R Holding (FC03)
129 129 Maximum line frequencyFrequency_Max float32 2 Hz 1 R Holding (FC03)
139 139 Maximum total active powerActivePower_Total_Max float32 2 W 1 R Holding (FC03)
145 145 Minimum voltage phase A to neutralVoltageL1N_Min float32 2 V 1 R Holding (FC03)
187 187 Minimum line frequencyFrequency_Min float32 2 Hz 1 R Holding (FC03)
203 203 Limit violation flagsLimitViolations · Bit layout in Table 3-9 (p. 45): bits 0 to 5 are limits 0 to 5 in the low byte of the register pair, plus a limit logic bit. 0 = no violation, 1 = violation. uint32 2 1 R Holding (FC03)
205 205 Device diagnostics and status flagsDeviceStatus · Bit layout in Table 3-8 (p. 45): synchronization pulse missing, configuration menu active, voltage overload, current overload, slot 1 module, pulse rate exceeded, plus stored events that the master must acknowledge. uint32 2 1 R Holding (FC03)
207 207 Digital output statusDigitalOutputStatus · Bit 0 of the lowest byte is output 0 (Table 3-7, p. 44). uint32 2 1 R Holding (FC03)
209 209 Digital input statusDigitalInputStatus · Bit 0 of the lowest byte is input 0 (Table 3-7, p. 44). uint32 2 1 R Holding (FC03)
211 211 Active tariffActiveTariff · 0 = tariff 1, 1 = tariff 2. uint32 2 1 R Holding (FC03)
213 213 Working hours counterWorkingHours uint32 2 s 1 RW Holding (FC03)
215 215 Universal counterUniversalCounter uint32 2 1 RW Holding (FC03)
501 501 Demand active power importDemandActivePower_Import float32 2 W 1 R Holding (FC03)
503 503 Demand reactive power importDemandReactivePower_Import float32 2 var 1 R Holding (FC03)
505 505 Demand active power exportDemandActivePower_Export float32 2 W 1 R Holding (FC03)
507 507 Demand reactive power exportDemandReactivePower_Export float32 2 var 1 R Holding (FC03)
517 517 Demand period lengthDemandPeriod uint32 2 s 1 R Holding (FC03)
519 519 Time elapsed in the current demand periodDemandElapsed uint32 2 s 1 R Holding (FC03)
801 801 Active energy import tariff 1ActiveEnergyImport_T1 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 Wh 1 RW Holding (FC03)
805 805 Active energy import tariff 2ActiveEnergyImport_T2 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 Wh 1 RW Holding (FC03)
809 809 Active energy export tariff 1ActiveEnergyExport_T1 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 Wh 1 RW Holding (FC03)
813 813 Active energy export tariff 2ActiveEnergyExport_T2 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 Wh 1 RW Holding (FC03)
817 817 Reactive energy import tariff 1ReactiveEnergyImport_T1 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 varh 1 RW Holding (FC03)
821 821 Reactive energy import tariff 2ReactiveEnergyImport_T2 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 varh 1 RW Holding (FC03)
825 825 Reactive energy export tariff 1ReactiveEnergyExport_T1 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 varh 1 RW Holding (FC03)
829 829 Reactive energy export tariff 2ReactiveEnergyExport_T2 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 varh 1 RW Holding (FC03)
833 833 Apparent energy tariff 1ApparentEnergy_T1 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 VAh 1 RW Holding (FC03)
837 837 Apparent energy tariff 2ApparentEnergy_T2 · 64-bit floating point, four registers. Overflow at 1.0e+12. float64 4 VAh 1 RW Holding (FC03)
50001 50001 Connection typeConnectionType · 0 = 3P4W, 1 = 3P3W, 2 = 3P4WB, 3 = 3P3WB, 4 = 1P2W. uint32 2 1 RW Holding (FC03)
50003 50003 Voltage transformer in useUseVoltageTransformer · 0 = no, 1 = yes. uint32 2 1 RW Holding (FC03)
50005 50005 Voltage transformer primaryPrimaryVoltage · Range 1 to 999999. uint32 2 V 1 RW Holding (FC03)
50007 50007 Voltage transformer secondarySecondaryVoltage · Range 1 to 690. uint32 2 V 1 RW Holding (FC03)
50011 50011 Current transformer primaryPrimaryCurrent · Range 1 to 99999. uint32 2 A 1 RW Holding (FC03)
50013 50013 Current transformer secondarySecondaryCurrent · 1 A or 5 A. uint32 2 A 1 RW Holding (FC03)
50021 50021 Demand period settingDemandPeriodSetting · Range 1 to 60. uint32 2 min 1 RW Holding (FC03)
50023 50023 Demand synchronization sourceDemandSyncMode · 0 = none, 1 = via bus, 2 = via digital input. uint32 2 1 RW Holding (FC03)
63015 63015 Ethernet protocolEthernetProtocol · 0 = Modbus TCP, 1 = SEAbus TCP. uint32 2 1 RW Holding (FC03)
63019 63019 Modbus or SEAbus address (RS485 module only)ModbusAddress · Range 1 to 247. Applies to the PAC RS485 expansion module. uint32 2 1 RW Holding (FC03)
64001 64001 Manufacturer IDIM_ManufacturerId · Standard value 42 stands for Siemens AG. The 27-register I&M block must be read as a whole starting at 64001. uint16 1 1 R Holding (FC03)
64002 64002 Order numberIM_OrderNumber · ASCII, 20 characters. string 10 1 R Holding (FC03)
64012 64012 Serial numberIM_SerialNumber · ASCII, 16 characters. string 8 1 R Holding (FC03)
64020 64020 Hardware versionIM_HardwareVersion uint16 1 1 R Holding (FC03)
60002 60002 Reset maximum valuesCmd_ResetMax · Write value 0. Command registers are written with function code 06. uint16 1 1 W Holding (FC03)
60003 60003 Reset minimum valuesCmd_ResetMin · Write value 0. uint16 1 1 W Holding (FC03)
60004 60004 Reset energy countersCmd_ResetEnergy · 0 = all counters, 1 to 10 select one counter in the order of the energy table (active import tariff 1 first, apparent tariff 2 last). uint16 1 1 W Holding (FC03)
60006 60006 Switch tariffCmd_SwitchTariff · 0 = high tariff, 1 = low tariff. uint16 1 1 W Holding (FC03)

Scale is the number to multiply the raw value by to get the unit. Types with more than one register (32 and 64-bit) follow the word order above.

Open in Modbus Poll

  1. Download the Modbus Poll blocks file.
  2. Open Modbus Poll, connect to the device and set its unit ID. The manual does not state the word order for 32-bit values. Check one known value (a voltage or a counter) and switch the setting if it reads wrong.
  3. In the blocks panel on the right, click Import CSV and pick the file. CSV import is a Pro feature. Without Pro, Modbus Poll polls the first 20 values of your blocks.
  4. The wire addresses are already in the file, so there is no 0-based or 1-based conversion to do.

Once the values look right, export the tag list to Ignition, Kepware, Node-RED, Home Assistant or Voltrus SCADA.

Source and accuracy

Manufacturer document: SENTRON Power Monitoring Device SENTRON PAC3200 Manual (cache.industry.siemens.com)

A5E01168664B-04, 02/2008 edition label as printed, p. 38-62. Read on 2026-10-24.

Also used: Data Exchange between S7-1200 and SENTRON PAC via MODBUS TCP (Set 22), Entry ID 40614428 V14.0 (cache.industry.siemens.com)

Addresses, types, units and scale are taken from the document above. Names and descriptions are written by Voltrus. Firmware versions can differ, so confirm a value on your own device before you rely on it.

Found a mistake? Report it by email with the register address and the manual page.

Read more: Siemens SENTRON PAC3200 Modbus register map and simulator

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