1
DATA COMMUNICATION USING MC
PROTOCOL
MC protocol is a communication method for the programmable controller. Using this protocol, the target devices can read or
write device data and programs from or to the CPU module via a C24.
C24 returns a response message automatically based on requests from the target devices. Thus, programs for response
messages are not required.
For details of the MC protocol, refer to the following manual.
MELSEC Communication Protocol Reference Manual
1.1
Accessing to CPU Module Using MC Protocol
This section explains how to access to a CPU module using MC protocol.
Reading/writing device memory of CPU module
Read/write data from/to the device memory of the access target CPU or intelligent function module buffer memory. For the
accessible range, refer to the following manual.
MELSEC Communication Protocol Reference Manual
Reading/writing programs and parameters
This function reads and writes program files and parameter files stored in the CPU module.
Remote control of CPU module
This function performs remote RUN/STOP/PAUSE/latch clear/reset operations.
Monitoring of CPU module
This function monitors the operation status and data in the device memory of the CPU module.
Transmitting data to a target device from a CPU module
This function requests data transmission from a CPU module to a target device, and transmits on-demand data to the target
device.
1 DATA COMMUNICATION USING MC PROTOCOL
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1.1 Accessing to CPU Module Using MC Protocol
ENQ
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STX