Siemens SENTRON PAC5200

Compatibility

Compatible with EpiSensor Edge over Modbus TCP

The PAC5200 is compatible with EpiSensor Edge over its built-in Ethernet port: Edge reads it as a Modbus TCP client with function 03. Siemens publishes the holding register map, the Float32 format and the register order, so a voltage read can be checked against the display before more points are added.

SENTRON PAC5200, 7KM5412-6BA00-1EA2 (panel, graphic display) and 7KM5412-6CA00-1EA8 (DIN rail, no display), using communication manual E50417-C1040-C568-A1 edition 03.2015. Site check: read L1 voltage at register 0201 and compare it with the display, which also settles the register offset. Read-only monitoring: set the Modbus TCP port to read-only access and write nothing to the clock or the controllable indications.

Connect it with

• Gateway ZGW-20 From €899 ex VAT Configure
• Evaluation Gateway on a Raspberry Pi Edge with one device licensed Free Set up

Models

Specifications

The PAC5200 is the recorder version of the SENTRON PAC5100/5200 family: on top of the basic measured values and harmonics to the 40th it adds power quality measurement to IEC 61000-4-30 class S, minimum, maximum and mean values, flicker to IEC 61000-4-15, event detection, EN 50160 reporting and 2 GB of internal memory. It is set up through its web server and reports over Modbus TCP on one RJ45 port; it has no serial interface.²

Order codes

7KM5412-6BA00-1EA2: panel flush mounting with graphic display, IP40 front. 7KM5412-6CA00-1EA8: snap-on DIN-rail device without display, IP20. 96 × 96 × 100 mm.²

Voltage inputs

Four inputs. Rated phase-to-neutral 63.5, 110, 230 or 400 V (347 V under UL) and phase-to-phase 110, 190, 400 or 690 V (600 V under UL); maximum 480 V phase-to-neutral and 831 V phase-to-phase; 42.5 to 69 Hz.²

Current inputs

Three inputs for external current transformers, rated 1 A or 5 A by parameterization, maximum 2 × rated current.²

Accuracy

Current class 0.2; active, reactive and apparent power class 0.5 to IEC 61557-12; active energy class 0.5S to IEC 62053-22 and reactive energy class 2 to IEC 62053-23. Power quality measurement to IEC 61000-4-30 class S.²

Ethernet

RJ45, 10/100Base-T on the top of the device, Modbus TCP. Default address 192.168.0.55; port 502 plus an optional user port from 10000 to 65535; up to four TCP connections; full or read-only access per port.^1, 2

Auxiliary supply

24 to 250 V DC or 110 to 230 V AC, each ±20%; at most 5 W on DC and 16 VA on AC.²

Outputs

Two binary outputs. No digital inputs.²

Environment

Operating -25 to +55 °C (the display is harder to read below 0 °C); storage -40 to +70 °C; up to 95% relative humidity 30 days a year, 75% annual mean, no condensation in operation; terminals IP2x.²

Interface

Documented measurements and integration boundaries for SENTRON PAC5200.

• Registers are numbered in decimal from 0001 and are all holding registers, read with FC03 only, up to 125 registers per request. Siemens does not say whether register 0201 goes on the wire as PDU address 200 or 201, so settle it once with the read below.
• Every measured value is a 32-bit IEEE 754 float in two registers. The manual states that the lower register holds the most significant byte, so decode high word first (ABCD). Values are in V, A, W, var, VA, Hz and %, not kilo-units.
• Phase voltages Va, Vb and Vc at 0201, 0203 and 0205, neutral voltage VN at 0207, line voltages Vab, Vbc and Vca at 0217, 0219 and 0221, and the mean phase voltage at 0223.
• Currents Ia, Ib and Ic at 0209, 0211 and 0213, neutral current at 0215 and the mean current at 0225.
• Active power Pa, Pb, Pc and total P at 0227, 0229, 0231 and 0233 in W, positive for demand and negative for supply. Reactive power Qa to Q at 0235 to 0241 (var, positive inductive) and apparent power Sa to S at 0243 to 0249 (VA).
• Active power factor cos φ a, b, c and total at 0251 to 0257, power factor PFa to PF at 0259 to 0265, power frequency at 0275 (Hz), voltage unbalance at 0277 and current unbalance at 0279 (%). Registers 0281 to 0292 are not part of the map.
• Voltage THDS a, b and c at 0295, 0297 and 0299 and current THDS at 0301, 0303 and 0305. Which phase-to-neutral or phase-to-phase values exist depends on the connection type set on the device.
• Three float codes carry status instead of a value: 7F800000 is an overflow (above 1.2 × rated voltage or 2 × rated current), 7F800001 is invalid (for example frequency with the voltage below 15% of rated) and 7F800002 is not calculated for the selected network type. Record these as missing data.
• Energy counters are signed 32-bit pulse counts in two registers, most significant register first: total active energy demand at 0813 and supply at 0821, per phase at 0807 to 0811 and 0815 to 0819, total reactive inductive at 0829, capacitive at 0837 and total apparent at 0845. Multiply by the float at 0801 (Wh, varh or VAh per pulse) for the energy.
• Counter status bits sit at 0803 to 0806: overflow, and invalid for one minute after a reset or device start. At rated voltage and current the device counts 60 000 pulses an hour, and Siemens puts the overflow about four years after a reset at continuous rated load.
• The clock at 0065 to 0068 and the controllable indications at 0141, which include an energy counter reset, are writable with FC06 and FC16. Keep them out of the poll.

Setup

1. Identify the device

   Read the order code on the label: 7KM5412 is a PAC5200, 7KM5212 a PAC5100. Note whether it is the panel version with a display (6BA00-1EA2) or the DIN-rail version (6CA00-1EA8), and record the firmware version, which the device reports at registers 0077 to 0082.

2. Check the network and access settings

   In the web server, note the IP address, the Modbus TCP port and the number of clients already connected. Set the access right for the port Edge uses to read-only; Siemens allows full or read-only access per port.

3. Settle the register offset

   Read the device type string at registers 0001 to 0008 with FC03. If PDU address 0 returns readable text such as SENTRON_PAC, the register numbers are one-based and 0201 is sent as 200. If address 0 is refused, send each register number as printed.

4. Make one voltage read

   Read two registers for Va at register 0201, as in the worked read below, decode them as a big-endian Float32 and compare the result with L1 voltage on the display or the web server.

5. Add the points you need

   Add current, power, frequency and power factor from the same table, then the energy counters with the conversion factor at 0801. Treat the status float codes and the counter status bits as missing data, and keep FC06 and FC16 out of the configuration.

Common questions

What byte order does the PAC5200 use for floats?

Big-endian with the most significant register first. The communication manual says data larger than one byte is stored with the most significant byte at the lowest register address and transmitted first, which is ABCD order for a Float32. A PAC4200 or PAC3220 decoder setting is not evidence for this device.¹

How do I get kWh from the energy registers?

The counters at 0807 to 0846 are signed 32-bit pulse counts. Read the float at 0801, the energy per pulse in Wh, varh or VAh, and multiply. For example, total active energy demand is the count at 0813 times the value at 0801, divided by 1000 for kWh. Check the counter status bits at 0803 to 0806 before trusting a value.¹

Which counter is import and which is export?

Siemens names them demand and supply. Active power is positive for demand and negative for supply, so WP_dmd at 0813 counts energy drawn from the network and WP_sup at 0821 counts energy fed back. If they appear swapped, check the current transformer direction and the connection settings on the device.^1, 2

Does the PAC5200 have RS-485?

No. Its only data interface is the RJ45 Ethernet port with Modbus TCP, so Edge reads it over the site IP network rather than through a ZMB-31 or a Gateway serial port.^1, 2

Can Edge and an existing SCADA system read the meter at the same time?

Yes, within the connection limit. The PAC5200 accepts four TCP connections on port 502, or two on port 502 and two on the user port when one is configured. Give Edge its own connection and a read-only port.¹