Mitsubishi Electric FX3U-ENET-ADP, User Manual

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7 Communication Using MC Protocol
62
FX
3U
-ENET-ADP User's Manual
7.4 List of Commands and Functions for The MC protocol
7.4 List of Commands and Functions for The MC protocol
The following table lists the commands and functions when an external device accesses the PLC.
*1. Make sure to set a multiple of 16 as the head device number of bit devices.
*2. Read or write 32 bits at a time when reading or writing double-word data in a user program, etc.
*3. It is not possible to specify C199 or lower (16 bits) and C200 or higher (32 bits) at the same time.
Function
Command/
response type
Processing
Number of points
processed per
communication
Device
memory
Batch read
Bit units 00H Reads bit devices (X, Y, M, S, T, C) in 1-point units. 256 points
Word units 01H
Reads bit devices (X, Y, M, S, T, C ) in 16-point units.
*1
32 words (512 points)
Reads word devices (D, R, T, C ) in 1-point units.
*2*3
The maximum number of communication points is 32 when
C200 or more is specified.
64 points
Batch write
Bit units 02H Writes to bit devices (X, Y, M, S, T, C ) in 1-point units. 160 points
Word units 03H
Writes to bit devices (X, Y, M, S, T, C ) in 16-point units.
*1
10 words (160 points)
Writes to word devices (D, R, T, C ) in 1-point units.
*2*3
The maximum number of communication points is 32 when
C200 or more is specified.
64 points
Test
(Random write)
Bit units 04H
Sets/resets bit devices (X, Y, M, S, T, C) in 1-point units by
arbitrarily designating the devices and device number.
80 points
Word units 05H
Sets/resets bit devices (X, Y, M, S, T, C) in 16-point units by
arbitrarily designating the devices and device number.
10 words (160 points)
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.
10 points
PLC control
Remote RUN 13H
Requests remote RUN/STOP to PLC. -
Remote STOP 14H
PLC model name read 15H Reads PLC model name code. -
Loopback test 16H
Returns the character received from the other node to that node
with the data as it is.
254 bytes