List Of Commands And Functions For The Mc Protocol - Mitsubishi MELSEC-F User Manual

9 WHEN COMMUNICATING DATA USING THE MC PROTOCOL

9.2 List of Commands and Functions for The MC protocol

Function
Batch read
Batch write
Device
memory
Test
(Random write)
Remote RUN
Remote STOP
PLC control
PLC model name read
Loop test
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The following table lists the commands and functions when an external device
accesses the PLC.
–
Command/response type
Bit units 00
H
Word units 01
H
Bit units 02
H
Word units 03
H
Bit units 04
H
Word units 05
H
13
H
14
H
15
H
16F
H
1 When the double word data is read using the user program, etc., read out the 32bit data at
once.
Processing
Reads bit devices (X, Y, M, S, T, C) in 1-point units.
Reads bit devices (X, Y, M, S, T, C ) in 16-point units.
Reads word devices (D, R, T, C ) in 1-point units. (
Writes to bit devices (X, Y, M, S, T, C ) in 1-point units.
Writes to bit devices (X, Y, M, S, T, C ) in 16-point units.
Writes to word devices (D, R, T, C ) in 1-point units.
Sets/resets bit devices (X, Y, M, S, T, C) in 1-point units
by arbitrarily designating the devices and device number.
Sets/resets bit devices (X, Y, M, S, T, C) in 16-point units
by arbitrarily designating the devices and device number.
Sets/resets word devices (D, R, T, C) in 1-point units by
arbitrarily designating the devices and device numbers.
Not applicable for 32 bit devices from C200 to C255.
Requests the remote RUN/STOP to PLC.
Reads PLC model name code.
Returns the character received from the other node to
that node with the data as it is.
MELSEC-F
Number of points
processed per
communication
256 points
32 words (512 points)
1) 64 points
160 points
10 words (160 points)
64 points
80 points
10 words (160 points)
10 points
254 bytes
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