Mitsubishi Electric MELSEC IQ-R series Reference Manual page 381

Register monitor data (command: EM)
Register the device number to be monitored in 1-point units.
Monitor the extended file register registered with EM command using the following command.
Page 380 Monitor (command: ME)
■Request data
Number of
E M
Message wait
device points
45 4D
H H
• Command
ACPU common
E M
45 4D
H H
• 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 number: Specify the block number and device number of the device to be monitored with 7 digits. (Page 374
Device number)
Specify the number of device points within the following range:
1  Number of device points  20
■Response data
There is no response data for this command.
■Communication example
Perform monitor data registration of 4 points (4 words) under the following conditions.
• Message wait: 0 ms
• Number of device points: 4 points (4 words)
• Device number: Register R1234 of block number 5, R2345 of block number 6, R3055 of block number 15, and R8000 of
block number 17.
(When the extended file register of block number 1 to 8 and 10 to 17 exist.)
Message wait
Number of
device points
E M 0 0 4 0 5
45 4D 30 30 34 30 35
H H H H H H H
Device No.
1 7 R 8 0 0 0
31 37 52 38 30 30 30
H H H H H H H
Device No. ( for the number of
device points)
Device No. Device No.
R 1 2 3 4 0 6 R
52 31 32 33 34 30 36 52
H H H H H H H H
Device No.
2 3 4 5 1 5 R 3
32 33 34 35 31 35 52 33
H H H H H H H
17 COMMUNICATING USING 1C FRAMES
17.5 Read and Write Extended File Register
0 5 5
30 35 35
H H H H
17
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