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MELSEC-Q
8 DATA COMMUNICATION USING THE PRE-DEFINED PROTOCOL
(d) Executing the protocols (program example)
Create a program with the dedicated instruction (CPRTCL instruction) using
GX Developer.
Switch the CPU module to RUN, and execute the registered protocol by the
dedicated instruction (CPRTCL instruction).
The following table shows the devices to be used.
• I/O signal of QJ71C24N
Predefined protocol ready: X1D
• Devices used in program example
Device Purpose Device Purpose
X20 CPRTCL instruction execution command M1
Status display device at
completion
D300 Inverter Station Number designation device M101 Normal completion flag
D10
Execution result storing device for the
CPRTCL instruction
M102 Error completion flag
D12
Execution protocol number designation
device
D100 Error code storing device
M0 Completion device — —
Stores set values in the
Send data storage area.
Protocol No.1 is specified.
Protocol is executed.
Communicated at CH2.
Normal completion flag
ON
Error completion flag ON
Error code is stored.
CPRTCL
execution
command
Predefined
protocol
ready
Receive data are stored to the receive data storage area (D200 to D203)
that is set to the receive packet.
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