Batch Read In Bit Units (Command: 0401) - Mitsubishi Electric MELSEC IQ-R series Reference Manual

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
Command Subcommand
■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
Frame
4C/3C/4E/3E frame
2C frame
■Subcommand
Type
For MELSEC-Q/L series
For MELSEC iQ-R series
For 2C frame, the specification is not required. Functions and specification methods are equivalent to the subcommands for
MELSEC-Q/L series.
8 DEVICE ACCESS
92
8.2 Batch Read and Write
Number of
Head device
device points
ASCII code
0 4 0 1
30 34 30 31
H H H H
1
31
H
ASCII code
0 0 0 1
30 30 30 31
H H H H
0 0 0 3
30 30 30 33
H H H H
Binary code
01 04
H H

Binary code
01 00
H H
03 00
H H