2. System Function 2.2.3. Data exchange between MC module and PLC module The areas for exchanging the data between MC and PLC are D6000~D6226, D6250~D6476. D6000~D6226 are where MC writes the data and PLC reads the value of the register; D6250~D6476 are where PLC writes the data and MC reads the value of the register. The principle is illustrated as below. Write into D6000~D6226 Read by PLC MC Read by Write into D6250~D6476 Data Exchange Figure The program inside MC includes motion program and logic program. The data in exchange area of MC are updated once every time all logic program execution is over.
(The data in D6000~D6226 are written into D6000~D6226 of PLC by MC and the data in D6250~D6476 of PLC are read into D6250~D6476 of MC by MC). The data in exchange area of PLC are updated once every time one scan cycle is over. (The data in D6250~D6476 are written into D6250~D6476 of MC by PLC and the data in D6000~D6226 of MC are read into D6000~D6226 of PLC by PLC). 2-12 DVP-MC operating manual Special Function explanation Attribute Data type Latched Remark D D6532 Axis alarm detection R/W UINT N 0: Axis alarm is not detected. The instructions related with the alarm axis can still be executed when the axis alarms. 1:
When the axis alarms, the alarm axis enters the state of ErrorStop and the motion instructions related with the alarm axis stops being executed.