Batch Read In Word Units (Command: 01) - Mitsubishi Electric MELSEC IQ-R series Reference Manual

Batch read in word units (command: 01)

Reads bit devices (X, Y, M, etc.) in 16-point units.
Reads word devices (D, T, C, etc.) in 1-point units
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Message format
The following shows the message format of the request data and response data of the command.
■Request data
Number of device
Head device Fixed value
points
■Response data
The data for the number of device points are stored.
The order of data differs depending on the ASCII code or binary code. (Page 402 Read data, write data)
Data specified by request data
■Head device
Specify the head device of the device to be read. (Page 397 Device codes and device numbers)
■Number of device points
Specify the device number to be read.
Specify '00H' when the number of device points is to 256 points. (Page 402 Number of device points)
When specifying bit devices, set the head device No. in multiples of 16 (0, 16, ... in decimal notation).
■Fixed value
Fixed to '0'.
ASCII code Binary code
0 0
30 30 00
H
H H
18 COMMUNICATING USING 1E FRAMES
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18.4 Read and Write Device Memory