Schneider Electric ComPacT NSX MicroLogic

Compatibility

Compatible with EpiSensor Edge over Modbus RTU through an IFM or Modbus TCP through an IFE

Schneider documents Modbus RTU on RS-485 through the IFM interface and Modbus TCP through the IFE interface and IFE server for ComPacT NSX breakers with MicroLogic 5, 6 or 7 trip units, and publishes the standard dataset and device registers with hex wire addresses, data types, units and the A or E types each register applies to.

ComPacT NSX 100 to 630 with a MicroLogic 5, 6 or 7 trip unit (firmware V001.008.003 or later for 5 and 6, V002.003.001 or later for 7), connected by NSX cord to an IFM (LV434000), IFE (LV434001) or IFE server (LV434002), using Modbus guide DOCA0384EN-01. Voltage, power, frequency and energy need an E type trip unit. Site check: read the product identification at register 8716, then compare current with the trip unit display. Read-only monitoring: no command interface writes.

Connect it with

• Modbus Interface ZMB-3X From €399 ex VAT Configure
• Gateway ZGW-20 From €899 ex VAT Configure
• Evaluation Gateway on a Raspberry Pi Edge with one device licensed Free Set up

Models

Specifications

MicroLogic 5, 6 and 7 are electronic trip units for ComPacT NSX 100 to 630: 5 gives LSI protection, 6 adds ground fault and 7 adds earth leakage. The E types measure energy as well as protecting the circuit. Communication goes over the ULP system to one IFM or IFE interface per breaker, which also carries the BSCM status module and IO module of the same breaker.^1, 5

Trip units covered

MicroLogic 5, 6 and 7, type A (current) or type E (energy), on ComPacT NSX 100 to 630 and PowerPacT H-, J- and L-frame breakers¹

Firmware

MicroLogic 5 and 6 V001.008.003 or later and MicroLogic 7 V002.003.001 or later for guide DOCA0384EN-01; IFM V003.001.012 or later; IFE V004.007.000 or later; IFE server V005.001.000 or later¹

IFM interface

LV434000; one RJ45 Modbus-SL port and two RJ45 ULP ports; address 1 to 99 on rotary switches, 99 from the factory; 4800 to 38400 baud, auto-speed sensing from the factory; 24 V DC supply; DIN rail, 18 x 109 x 73 mm^1, 4

IFE interface

LV434001 for one breaker, LV434002 switchboard server; two RJ45 Ethernet ports; Modbus TCP on port 502 and unit ID 255; 8 or 16 Modbus TCP connections; IPv4 by DHCP from the factory; 24 V DC supply^1, 3

Response time

Typically under 10 ms for 90% of exchanges and up to about 700 ms; Schneider recommends a 1 s timeout¹

Trip unit example

LV429095: MicroLogic 5.2 E for ComPact NSX 100 to 250, 100 A, 3 poles, LSI, 690 V AC, -25 to 70 °C operating, EN/IEC 60947-2⁵

Environment

IFM: -20 to 70 °C operating, IP30 (connectors IP20), 5 to 85% RH at 55 °C⁴

Default passwords

Administrator 0000, Services 1111, Engineer 2222, Operator 3333, four ASCII characters each; change them at first use^1, 2

Interface

Documented measurements and integration boundaries for ComPacT NSX MicroLogic.

• Every table in Schneider's guide gives the hex address used in the Modbus frame and the decimal register number, with register = address + 1: RMS current on phase 1 is address 0x7D1B, register 32028. Edge sends the hex address.
• INT64 and INT64U values are big-endian, most significant register first; FLOAT32 is IEEE 754 in two registers. Read the measurement registers with FC03 (FC04 and FC100 subcode 4 also read). A block that holds energy must be read whole: a partial read of a multi-register value returns an error.
• Standard dataset, FLOAT32 in A: current on phases 1, 2 and 3 at registers 32028, 32030 and 32032, neutral at 32034 (when the system type at 3314 is 30 or 41) and the most loaded phase at 32036.
• Standard dataset, FLOAT32 in V, E types: phase-to-phase V12, V23 and V31 at 32056, 32058 and 32060; phase-to-neutral V1N, V2N and V3N at 32062, 32064 and 32066 (system type 40 or 41).
• Standard dataset, FLOAT32, E types: active power on phases 1, 2 and 3 at 32072, 32074 and 32076 and total at 32078 in W; total reactive power at 32086 in VAR; total apparent power at 32094 in VA; frequency at 32068 in Hz; total power factor at 32212.
• Standard dataset energy, E types: total active energy at 32096 (INT64, Wh), delivered at 32104 and received at 32108 (INT64U, Wh), reactive energy at 32100 (INT64, VARh), and the not-resettable cumulative active energy delivered at 32124 and received at 32128 (INT64U, Wh).
• Demand, FLOAT32, E types: total active power demand at 32164 in W, phase current demand at 32156 to 32162 in A.
• Status and trip causes: breaker status at 32001 (bit 0 OF open or closed, bit 1 SD tripped, bit 2 SDE tripped on electrical fault) with its bit quality at 32000; tripping causes at 32007 with quality at 32006.
• Identity: MicroLogic product identification at register 8716 (address 0x220B, INT16U): 15143 distribution type A, 15144 distribution type E, 15145 motor type E. Metering type at 8741 reads A or E as text.
• The guide reads the whole dataset in three requests: 124 registers from 32000 (address 0x7CFF), 118 from 32124 and 96 from 32340. Real-time values refresh every 1 s, demand every 1 s and energy every 5 s.
• Out-of-order and not-applicable values: FLOAT32 0xFFC00000, INT64 0x8000000000000000, INT64U 0xFFFFFFFFFFFFFFFF, INT16U 0xFFFF. Bit 15 of a status register set to 1 means the other bits are not significant.
• Power and energy signs follow the power flow sign at register 3316 (0, upstream to downstream, from the factory), and energy accumulates in absolute mode from the factory (register 3324). The power flow sign configuration command can reset the energy registers other than the cumulative ones.
• Writes and commands: remote control commands, including opening and closing a motor-operated breaker and resetting energies, go through the command interface from register 8000 with FC16. Keep the poll to reads.

Setup

1. Identify the trip unit and interface

   Read the trip unit name on its front (for example MicroLogic 5.2 E) and the interface reference (IFM LV434000, IFE LV434001 or IFE server LV434002). Voltage, power and energy need an E type. Record the trip unit firmware with EcoStruxure Power Commission.

2. Set the address or IP

   On an IFM, set the Modbus address from 1 to 99 on the two rotary switches (99 from the factory) and match the bus speed and parity, 19200 baud and even parity by default. On an IFE, give it a reserved IP address; it answers on unit ID 255.

3. Close the locking pad for monitoring

   The IFM and IFE locking pads come open from the factory, which enables remote control commands. Turn the arrow to the closed padlock where the breaker is only monitored; reads still work. On an IFE, enable Modbus TCP/IP filtering and give the Gateway's IP address the Read access level.

4. Read the product identification

   Send FC03 for one register at address 0x220B, register 8716. Expect 15144 for a distribution type E trip unit, 15143 for type A or 15145 for motor type E.

5. Read current, power and energy from the dataset

   Read current on phase 1 at register 32028 (address 0x7D1B) as FLOAT32 in A and compare it with the trip unit display, then total active power at 32078 (address 0x7D4D) in W and cumulative active energy delivered at 32124 (address 0x7D7B) as INT64U in Wh.

6. Keep the poll read-only

   Poll at 1 s or slower with a 1 s timeout, treat 0xFFC00000 and 0xFFFFFFFFFFFFFFFF as missing, and keep the command interface at register 8000 out of the poll.

Common questions

Can a MicroLogic 5.2 A give energy over Modbus?

No. Type A trip units measure current only. Voltage, power, power factor, frequency and energy registers are available on type E trip units such as the MicroLogic 5.2 E.^1, 2

Which unit ID does an IFE use?

255. The guide states that the IFE takes the Modbus address 255 and that it cannot be changed. An IFM uses the address set on its rotary switches, from 1 to 99.¹

Should Edge read the dataset or the MicroLogic registers?

The dataset. Schneider recommends the standard dataset from register 32000 because it answers faster than the device registers and holds the main measurements in FLOAT32 and INT64, where the older device registers use scaled 16-bit and 32-bit integers, for example total active power at register 1037 as an INT16 with scale factor 10, so the register holds tenths of a kW.^1, 2

Which energy register should I log?

Total cumulative active energy delivered at register 32124 (INT64U, Wh), which cannot be reset. The total, delivered and received energies at 32096, 32104 and 32108 are cleared by the reset energies command and can be reset by the power flow sign configuration command.¹

Can a monitoring client open or close the breaker?

Only through the password-protected command interface, and only while the interface's locking pad is open, which it is from the factory. Close the locking pad on a breaker that is only monitored, change the default passwords, and keep Edge to reads.¹