Execution Procedure - Mitsubishi Electric MELSEC IQ-R series Reference Manual

Execution procedure

The procedures for the on-demand function are as shown below.
Procedure for CPU module and C24
The following shows the procedure to send data using the on-demand function from CPU module.
1.
Set the items for the on-demand function.
Page 280 Settings for using the on-demand function
2.
Execute the serial communication module dedicated instruction 'G (P). ONDEMAND'.
•  MELSEC iQ-R Programming Manual (Instructions, Standard Functions/Function Blocks)
•  MELSEC-Q/L Serial Communication Module User's Manual (Application)
Procedure for external device
The following shows the procedure to receive the data (on-demand data) transmitted using the on-demand function from CPU
module.
1.
Receive the message.
2.
Judge whether the received message is issued from the on-demand function by "PC No.".
For the message of on-demand function, 'PC No.' will be 'FE'. (Page 52 Network No., PC No.)
3.
Process the received on-demand data.
13 SERIAL COMMUNICATION MODULE DEDICATED COMMANDS
281
13.6 On-demand function
13