9.1.1. Communication Data Flow This is the flow from issuing command data from the controller (SCU unit) to the partnering device through serial communication and receiving response data from the partnering device. 50 1. 1. Send/Receive Sequence The Protocol Macro command (command word: Processing ExecPMCR) of the Sequence number specified in the program is executed, and the Send / Receive Sequence (Protocol Macro data) registered in the SCU unit is called. ▼ 2. 2. Send Command Based on the Sequence No. specified in Step 1, the Processing SCU unit issues a Send message (Command data) to the external device. ▼ 3. 3.
Response Received Stores the received message (Response data) Processing received from the Partner device in the SCU unit in the internal variable of the specified CPU unit.