Eliwell IDNext

Compatibility

Compatible with EpiSensor Edge over Modbus RTU

The IDNext answers Modbus RTU on its TTL serial port. An Eliwell BusAdapter 150 DONGLE, which lists every IDNext model, or a DIN-rail BusAdapter 130 or 150 converts the port to RS-485, and a ZMB-31 reads it and sends it to Edge over the EpiSensor wireless network. Eliwell's user manual prints the Modbus address, size and sign of every probe, status, alarm and counter.

IDNext -HC 902, 961, 971, 974 and 978, with the Modbus tables of user manual IDNXP-02EN (02/2023). The IDPlus and EWPlus have their own tables and are not covered. Site check: read Pb1 at 4109 and compare it with the display. The manual gives the probe range to one decimal place without stating the scale, so the template reads tenths of a degree; correct the multiplier if the first read disagrees. Read-only monitoring: the manual's write commands for outputs, defrost and stand-by are not used.

Connect it with

• Modbus Interface ZMB-3X From €399 ex VAT Configure
• Gateway ZGW-20 From €899 ex VAT Configure

Specifications

The IDNext -HC family runs a refrigerated cabinet or cold room from one regulation probe (Pb1) and, on the 971, 974 and 978, a defrost probe (Pb2) on the evaporator. The relays range from one compressor relay on the 902 and 961 to compressor, defrost, fan and alarm relays on the 978. It is built for refrigerants including flammable ones, and preset applications AP1 to AP3 load typical settings.¹

Models

IDNext 902 P, 961 P, 971 P/B, 974 P/B, 974 P/C, 974 P/CI, 978 P/B, 978 P/C, 978 P/CI¹

Supply

12 V AC/DC (SELV, Class 2) or 230 V AC ±10 %, 50/60 Hz, by model¹

Probe inputs

NTC, PTC or Pt1000; Pb1 on every model, Pb2 on the 971, 974 and 978¹

Accuracy

NTC better than ±1.6 °C ±1 digit from -30 to 110 °C; Pt1000 better than ±2.3 °C ±1 digit; resolution 0.1 °C¹

Data port

1 TTL serial port for UNICARD or a Modbus monitoring device; TTL cable up to 1 m^1, 2

Modbus functions

03 read, 16 write, 43 read device ID; messages up to 50 bytes¹

Serial settings

Adr 1 to 247 (default 1); bAU 9600, 19200 or 38400 bit/s (default 9600); Pty none, even or odd (default even)¹

RS-485 interface

BusAdapter 150 DONGLE: A+, B-, GND; 800 m at 9600 bit/s, 400 m at 19200 bit/s; at most 8 unit loads⁴

Front protection

IP65, front panel only¹

Interface

Setup

1. Fit the BusAdapter

   With the controller off, plug the BusAdapter 150 DONGLE (or a DIN-rail BusAdapter 130 or 150) into the TTL port with the cable supplied for it. Fix the adapter inside the equipment so it cannot pull out, and wire A+, B- and GND to the ZMB-31.

2. Check the serial settings

   In the Add folder, give each controller a unique Adr (1 to 247), keep bAU at 9600 bit/s and note Pty: even parity with 1 stop bit by default. Set the same frame in the ZMB-31. Switch the controller off and on after changing Pty.

3. Read Pb1

   Read Pb1: FC03, address 4109, one register, signed 16-bit. Compare it with the display: with the template's multiplier of 0.1, a raw 30 is 3.0 °C. If the display uses °F (dro), the value is in °F.

4. Import the template

   Import the IDNext template. Check that bit 4 of the status word (4115) sets during a defrost and bit 15 when the door opens, and read Att, HAL and LAL before relying on the controller's alarm bits.

5. Add the independent probe

   For the food safety record, place a TES-2X probe at the warmest product position and set its alarm limits and delays from the site's HACCP plan.

Common questions

Does the IDNext have Modbus?

Yes, on its TTL serial port. Eliwell's user manual documents Modbus RTU with function 03 to read, 16 to write and 43 to read the device ID, and prints the address of every resource. RS-485 needs an Eliwell BusAdapter between the port and the ZMB-31.^1, 2

Which BusAdapter do I need?

The BusAdapter 150 DONGLE (BA00000XD00x) lists every IDNext part number as a supported device; it is not opto-isolated. The DIN-rail BusAdapter 130 and 150 are opto-isolated, and the 150 has reinforced insulation. Eliwell's own instruction is to check the controller's documentation for the adapter model.^1, 3, 5

Where are the door and defrost states?

In the status word at 4115: bit 4 (mask 16) is defrost 1 and bit 15 (mask 32768) the door status. The door-open alarm is bit 3 (mask 8) of the alarm word at 4121. Edge reads each word whole; decode the bit in Edge or the receiving platform.¹

Can I use the IDNext addresses on an IDPlus?

No. The IDPlus selects Televis or Modbus with PtS and has its own Modbus table; the IDNext table in this guide does not apply to it. The BusAdapter 150 DONGLE lists IDPlus models too, so the wiring is the same.^3, 6

Is the controller probe enough for HACCP records?

Eliwell states better than ±1.6 °C for an NTC probe on the controller, and the probe sits where the controller needs it. Most HACCP plans take the record at the warmest product position with a tighter probe, such as a TES-2X at ±0.2 °C in its normal range, and keep the controller data beside it. The food business operator remains responsible for the plan.^1, 8