Mitsubishi Electric MELSEC iQ-R Series - Page 371

17 COMMUNICATING USING 1C FRAMES
17.4 Device Memory Read and Write
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Monitor (bit units) (command: MB, MJ)
Monitor the registered bit devices (X, Y, M, etc.).
• The bit device memory registered with BM command is monitored using MB command.
• The bit device memory registered with JM command is monitored using MJ command.
■Request data
• Command
• Message wait: Specify the delayed time of the response transmission. (Page 347 Message wait)
■Response data
The value of read device is stored in bit units. (Page 74 Read data, write data)
■Communication example
Monitor bit devices specified with monitor data registration under the following conditions.
• Message wait: 0 ms
• Registered devices for monitoring: 3 points (3 bits) of contacts for X040, Y060 and T123.
(Request data)
• When using MB (ACPU common command)
• When using MJ (AnA/AnUCPU common command)
(Response data)
ACPU common AnA/AnUCPU common
Message wait
Command
MB
4DH 42H
MJ
4DH 4AH
Monitoring result ( For the
number of device points )
MB
4D H 42 H
0
30 H
Message wait
MJ
4D H 4A H
0
30 H
Message wait
(X040) (Y060)
1
31H
0
30H
1
31H
Monitoring result ( For the number of device points )
(Contact of T123)