Mitsubishi Electric MELSEC iQ-R Series - Page 369

17 COMMUNICATING USING 1C FRAMES
17.4 Device Memory Read and Write
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Register monitor data (bit units) (command: BM, JM)
Set the bit devices (X, Y, M, etc.) to be monitored in 1-point units.
Monitor the device memory registered in bit units using the following command.
Page 369 Monitor (bit units) (command: MB, MJ)
■Request data
• Command
• Message wait: Specify the delayed time of the response transmission. (Page 347 Message wait)
• Number of device points: Convert the numerical value to 2-digit ASCII code (hexadecimal), and send it from the upper
digits.
• Device: Specify the devices to be monitored. (Page 351 Device codes, device numbers)
Specify the number of device points within the following range:
1  Number of device points  40
When using the BM command and accessing ACPU other than AnA/AnU, device X (input) has two processing
points per point.
■Response data
There is no response data for this command.
■Communication example (Monitor data registration in bit units)
Perform monitor data registration of the bit device under the following conditions.
• Message wait: 0 ms
• Number of device points: 3 points (3 bits)
• Device: Contacts of X40, Y060, and T123.
(Request data)
• When using BM (ACPU common command)
• When using JM (AnA/AnUCPU common command)
ACPU common AnA/AnUCPU
common
Device
(first point)
Device
(nth point)
Number of
device points
(n points)
Command Message wait
BM
42H 4DH
JM
4AH 4DH
BM
42 H 4D H 58 H
4
35 H 34 H 30 H
03
30 H 33 H
00
30 H
30 H
0X0
59 H
6
30 H 36 H 30 H
00
30 H
Y0
54 H
2
31 H 32 H 33 H
3S
53 H
T1
Message wait
Number of
device points
DeviceDevice Device
JM
4A H 4D H 58 H
4
30 H 34 H 30 H
03
30 H 33 H
00
30 H
30 H
0X 00
30 H
0
30 H
59 H
6
30 H 36 H 30 H
00
30 H
Y0
54 H
2
31 H 32 H 33 H
3S
53 H
T1
30 H
0
30 H
0
30 H
0
30 H
0
Message wait
Number of
device points
DeviceDevice Device