Mitsubishi Electric MELSEC iQ-R Series - Batch Read in Bit Units (Command: 0401)

92
8 DEVICE ACCESS
8.2 Batch Read and Write
Batch read in bit units (command: 0401)
Read values from devices in bit units.
When accessing any of the following devices, use the device extension specification (subcommand: 008).
• Link direct device
• Module access device
• CPU buffer memory access device
For the message format for device extension specification, refer to the following section.
Page 438 Read/Write by Device Extension Specification
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 bit units. The data order differs between ASCII code or binary code. (Page 74 Read
data, write data)
Data specified by request data
■Command
■Subcommand
For 2C frame, the specification is not required. Functions and specification methods are equivalent to the subcommands for
MELSEC-Q/L series.
Frame ASCII code Binary code
4C/3C/4E/3E frame
2C frame 
Type ASCII code Binary code
For MELSEC-Q/L series
For MELSEC iQ-R series
Command Subcommand Head device
Number of
device points
0
30H
4
34H
0
30H
1
31H
01 H 04 H
1
31H
0
30H
0
30H
0
30H
1
31H
01H 00H
0
30H
0
30H
0
30H
3
33H
03H 00H