Pego ECP 202
Controls cold room temperature via Modbus RTU
Template for the Pego ECP 202 cold room controller over Modbus RTU. Reads room temperature, evaporator temperature, setpoint, and alarm status. Also allows remote writing of the temperature setpoint for climate control.
- Protocol
- Modbus RTU
- Connection
- RS485, 9600 baud
- Registers
- 4, read and write
- Brand
- Pego
- Key readings
- Room temperature · Setpoint temperature · Evaporator temperature · Alarm status
- Available commands
- Setpoint temperature
- Compatible models
- ECP 202
- Last updated
Registers (4)
4 read, 1 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| Raumtemperatur | °C | Read | |||
| Solltemperatur | °C | Read and write | |||
| Verdampfertemperatur | °C | Read | |||
| Alarm Status | Read |
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Use cases
- Monitor cold room temperature and evaporator temperature on a live dashboard for your customer.
- Create an alert when room temperature exceeds a safe threshold for more than 10 minutes.
- Remotely adjust the setpoint temperature to match seasonal storage requirements without a site visit.
- Track alarm status from the Pego ECP 202 and receive instant notifications on critical faults.
- Log historical temperature data for food safety compliance and audit documentation.
Installation
Wire the ModbusCloud Gateway to the RS-485 terminals on the Pego ECP 202, connecting A, B, and GND correctly.
Configure the Modbus RTU settings on the gateway to 9600 baud, odd parity, and 1 stop bit to match the ECP 202 defaults.
Set a unique Modbus slave address on the ECP 202 and enter the same address in the ModbusCloud gateway configuration.
Import the Pego ECP 202 template from the ModbusCloud template library and assign it to the configured device.
Verify that room temperature, evaporator temperature, setpoint, and alarm status readings appear on the dashboard.
Test the writable setpoint register by changing the target temperature from the dashboard and confirming the update on the controller display.
Things to watch for
What baud rate and parity settings does the Pego ECP 202 require?
The default communication settings are 9600 baud with odd parity (parity value 1). Make sure the Modbus gateway is configured with the same parameters, otherwise communication will fail.
Can I connect multiple ECP 202 controllers on one RS-485 bus?
Yes. Assign each ECP 202 a unique Modbus slave address. The ModbusCloud gateway will poll each device separately using the same RS-485 wiring.
How is the setpoint temperature scaled in the register?
The setpoint is stored as a uint16 value at register address 768. Check the Pego documentation for the scaling factor, as some models use a multiplier of 10 (e.g., 50 means 5.0 degrees).
The alarm status register shows a value but I do not know what it means.
Refer to the Pego ECP 202 manual for the alarm code definitions. Each bit or value in the alarm register corresponds to a specific fault condition such as sensor failure or high temperature.
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