Device Memory Read/Write; Commands And Device Range - Mitsubishi MELSEC-F User Manual

9 WHEN COMMUNICATING DATA USING THE MC PROTOCOL

9.3 Device Memory Read/Write

9.3.1 Commands and device range

Item
Bit units
Batch read
Word units
Bit units
Batch write
Word units
Bit units
Test
(random write)
Word units
9 - 16
This section explains the designations in the control procedure when reading from and
writing to the device memory by providing an example.
(1) Commands used for reading from and writing to the device memory
Command/response type
00
H
01
H
02
H
03
H
04
H
05
H
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 numbers.
Writes to word devices (D, R, T, C, etc.) in 1-point
units by arbitrarily designating the devices and
device numbers.
Not applicable for 32 bit devices from C200 to C255.
MELSEC-F
Number of points processed per
communication
256 points
32 words (512 points)
64 points
160 points
10 words (160 points)
64 points
80 points
10 words (160 points)
10 points
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