We are installing Prosoft 3600-MBS Modbus cards (probably the same as Sprecher+S CMB4 cards) into Allen Bradley 825-MM (probably the same as CET4) Smart motor manager relays. They have arrived without any relevant technical documentation. just noddy user guides. As far as I can work out the map is built into the motor protection relay - but I have trolled the internet and cannot locate it anywhere. Can someone please drop me a modbus map / or link to where I can get one.

List of Registers + Description + Range + units = lovely!

pblyth [at] fpsomanagement.com.au

 

it appears that starting with modbus address 40001 (or 30001) you will have index 50 of the CET device... So address 40001 (or 30001) will be the "I Motor" value. Address 40002 will be "Thermal Utilization" and 40003 will be "I Phase L1". So all these registers are consecutive and should match the registers in your CET4 device.

Please let me know if there are any questions.