Mitsubishi Electric MELSEC FX Series - Commands and Device Ranges; Commands

FX communication
Computer link 7
7-16
7.7 Commands and Device Ranges
7.7.1 Commands
* Computer except high speed (32-bit) counters C200 to C255.
Command
Description
Maximum No. of units
per communication
Symbol
ASCII
code
FX
0N
,
FX
1S
FX, FX
2C
,
FX
1N
, FX
2N
,
FX
2NC
Device memory
Batch
read
Bit
unit
BR 42H, 52H
Reads a group of bit devices (X, Y, M,
S, T, C), result is in units of 1 device.
54 points 256 points
Word
unit
WR 57H, 52H
Reads a group of bit devices (X, Y, M,
S), result is in units of 16 devices.
13 words,
208 points
32 words,
512 points
Reads a group of word devices (D, T,
C), result is in units of 1 device.
13 points 64 points
Batch
write
Bit
unit
BW 42H, 57H
Writes a group of bit devices (X, Y, M,
S, T, C), data is in units of 1 device.
46 points 160 points
Word
unit
WW 57H, 57H
Writes a group of bit devices (X, Y, M,
S), data is in units of 16 devices.
10 words,
160 points
10 words
160 points
Writes a group of word devices (D, T,
C), data is in units of 1 device.
11 points 64 points
Te s t
(select
write)
Bit
unit
BT 42H, 54H
Set/reset individual bit devices (X, Y,
M, S, T, C) selectively in units of 1
device.
10 points 20 points
Word
unit
WT 57H, 54H
Set/reset bit devices (X, Y, M, S)
selectively in units of 16 devices.
6 words,
96 points
10 words,
160 points
Write word devices (D, T, C*)
selectively in units of 1 device.
6 points 10 points
PC
Remote run RR 52H, 52H
Remote run/stop request to
programmable controller.

Remote stop RS 52H, 53H
PC type read PC 50H, 43H PC type name(code) is read.
Global GW 47H, 57H
Set/reset the global flag (M8126 for
FX series) to all connected
programmable controllers.
1 point 1 point
On-demand

Send request from programmable
controller. Possible, however, only in
1:1 system configuration.
Maximum
13 words
Maximum
64 words
Loopback test TT 54H, 54H
Characters received from the
computer are directly sent back to the
computer.
25
characters
254
characters