1 ABILITY OF MC PROTOCOL
1.2 Features
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1
1.2 Features
Communication from external device without using sequential programs
The programmable controller transmits data in accordance with the commands from an external device. Thus, a program for
data communication is not required for CPU module. (When using on-demand functions with C24, a sequence program for
data communication from CPU module is required.)
Communication protocols of C24/E71
The message formats and control procedures for an external device to access a programmable controller are defined for each
supported device.
Accessible via various network
By using MC protocol, accessing other station via various network can be performed seamlessly.
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100
Supported device
External device
Read/write
Request message
Control
codes
Frame ID No. Access route Request data
Control
codes
Frame ID No. Response data
Access route
Response message
External device
other stations
other stations
Multidrop connection
Multidrop connection
Network
No.1
Network
No.n
other stations
(Relay station)
(Relay station)
Connected station
(Host station)
other stations
Access range
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