Mitsubishi Electric MELSEC iQ-R Series - Batch Read (Command: ER)

17 COMMUNICATING USING 1C FRAMES
17.5 Read and Write Extended File Register
375
17
Batch read (command: ER)
Read extended file register (R) in 1-point units.
Message format
The following shows the message format of the request data and response data of the command.
■Request data
■Response data
The value of read device is stored in word units. (Page 74 Read data, write data)
Data specified by request data
■Command
■Message wait
Specify the delayed time of the response transmission. (Page 347 Message wait)
■Head device No.
Specify the block number and device number of head device with 7 digits. (Page 374 Device number)
■Number of device points
Convert the numerical value to 2-digit ASCII code (hexadecimal), and send it from the upper digits.
Specify the number of device points within the following range:
•1  Number of device points  64
• Head device No. + Number of device points - 1  Maximum device No.
Communication example
Read data of 2 points (R8190 and R8191) of block number 12 under the following conditions.
• Message wait: 0 ms
• Block number: 12
• Head device: R8190
• Number of device points: 2 points (2 words)
(Request data)
(Response data)
ACPU common
ER
45 H 52 H
Message wait Head device No.
Number of device points
(Number of words)
ER
45H 52H
ER
45 H 52 H 31 H
8
52 H 38 H 31 H
02
30 H 32 H
12
32 H 30 H
01 R 9
39 H 30 H
0
Message wait
Number of device points
(Number of words)
Head device No.
7ABC1234
32 H 33 H 34 H 31 H 41 H 42 H 43 H 37 H
Data read
(Decimal : 4660) (Decimal : 31420)
(R8190 in NO.12) (R8191 in NO.12)