Proline Promass 83E/F/O Modbus RS485 Operating Instructions

Proline Promass 83 Modbus RS485OperationResponse time!Note!The response time when accessing the data area (register addresses 5051 to 5081) is typicallybetween 3 and 5 ms.It may take longer for a command to be executed in the device. The data is not updated until thecommand has been executed. Especially write commands are affected by this!ExampleThe following device parameters should be grouped via the auto-scan buffer and read out by themaster with just one request telegram:• Mass flow Register address 2007•Temperature Register address 2017• Totalizer 1 Register address 2610• Actual system condition Register address 68591. Configuration of the scan list• With the local operation or a configuration program (via the function matrix):BASIC FUNCTION block Modbus RS485 function group SCAN LIST REG. function Entry of the address 2007 under SCAN LIST REG. 1 Entry of the address 2017 under SCAN LIST REG. 2 Entry of the address 2610 under SCAN LIST REG. 3 Entry of the address 6859 under SCAN LIST REG. 4• Via the Modbus master (the register addresses of the device parameters are written to the registers5001 to 5004 via Modbus):1. Write address 2007 (mass flow) to register 50012. Write address 2017 (temperature) to register 50023. Write address 2610 (totalizer 1) to register 50034. Write address 6859 (actual system condition) to register 5004Modbus RS485SlaveMasterAutoscan BufferRegisterDataValueValueDataRegisterScan ListNo.1234Register5001500250035004DataRegister2007201726106859Fig. 34:Configuration of the scan list via the Modbus mastera0004406-enIssue/Rev. 0.2 (12/12) MN0M030 • Page 51