Grundfos CIM 200

Installation

1. 1Install the CIM 200 module inside the Grundfos E-pump using the internal 10-pin connector, following the Grundfos installation manual.
2. 2Wire the RS-485 Modbus RTU bus (A, B, and GND) from the CIM 200 terminal to the ModbusCloud gateway (MCG or MLP series).
3. 3Set the Modbus slave address on the CIM 200 to a unique value that does not conflict with other devices on the bus.
4. 4Confirm the baud rate is set to 19200 on both the CIM 200 and the ModbusCloud gateway.
5. 5Import the Grundfos CIM 200 template in the ModbusCloud platform and assign it to the correct gateway and slave address.
6. 6Verify that live readings such as pump liquid temperature, RPM, and motor current appear on the ModbusCloud dashboard.

Things to watch for

01

What baud rate should I use for the CIM 200?

The default baud rate is 19200. Make sure this matches the setting on the ModbusCloud gateway. If communication fails, double-check the parity and stop bit settings as well.

02

Why does the operation time value look incorrect?

Operation time is split across two 32-bit registers: OperationTimeHI at address 326 and OperationTimeLo at address 328. The template combines these automatically, but if registers are read out of order or partially, the value may appear wrong. Ensure both registers are polled in the same read cycle.

03

Can I control the pump speed or setpoint through this template?

No. The Grundfos CIM 200 template is read-only and does not include control registers. It is designed for monitoring pump status and operational data only.

04

Which Grundfos pump models are supported?

The template supports all Grundfos E-pumps that accept the CIM 200 module. This includes CRE, CRNE, CRIE, MTRE, CHIE, CME, TPE, TPE Series 2000, NBE, NKE, CUE drives, and MAGNA3 pumps.

Registers (10)

10 read / 0 write

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