Chapter 1 Ability Of Mc Protocol; Purposes - Mitsubishi Electric MELSEC IQ-R series Reference Manual

1
ABILITY OF MC PROTOCOL
This chapter explains the purposes and features of the MC protocol.
1.1

Purposes

MC protocol performs data communication to control a programmable controller system on the external devices (such as a
personal computer, GOT).
Reading and writing data
By reading/writing data to/from the device memory of the CPU module and buffer memory of the intelligent function modules,
the following operations can be performed:
■Reading data
Operation monitoring, data analysis, production control, etc. of the CPU module can be performed on the external device.
■Writing data
Production instructions can be issued from the external device.
Reading and writing files
By reading/writing files such as programs and parameters stored in the CPU module, the following operations can be
performed:
■Reading files
File management for the CPU modules of the connected station (host station) and other station can be performed on the
external device.
■Writing files
Execution programs can be modified (replaced) by writing file data stored in the external device to the programmable
controller CPU as necessary.
Remote control of CPU module
The CPU module can be remotely controlled from the external device by performing remote RUN/STOP/PAUSE/Latch Clear/
RESET operations.
Monitoring CPU module
The status of CPU module and data in the device memory can be sent to an external device at constant intervals, upon the
occurrence of a mechanical error, or when certain conditions are satisfied.
Data transmission from CPU module to external device (On-demand function)
The emergency data that is required to notify to external devices can be sent from the CPU module.
1 ABILITY OF MC PROTOCOL
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1.1 Purposes