Random Read And Write; Random Read Labels (Command: 041C) - Mitsubishi Electric MELSEC IQ-R series Reference Manual

9.3

Random Read and Write

Specify a label and read/write value in one point unit. When reading and writing data in batch by specifying continuous
elements of array, use batch read and write command. (Page 136 Batch Read and Write)

Random read labels (command: 041C)

Read value in one point units by specifying multiple labels.
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 data of read label is stored for the number of label points specified with request data.
Label points Label data
(1st point)
(n points)
Data specified by request data
■Command
ASCII code
0 4 1 C
30 34 31 43
H H H H
■Subcommand
ASCII code
0 0 0 0
30 30 30 30
H H H H
■Label points
Specify the point of label to read. (Page 131 Points)
■Abbreviation specification
Specify the label name length and label name to be abbreviated. (Page 129 Abbreviation specification of label)
When do not abbreviate, specify '0'.
ASCII code
0 0 0 0
30 30 30 30
H H H H
■Label specification
Specify the label name and label length of global label for the specified number of label points. (Page 125 Labels)
For a structure type label or array type label, specify the data of each element.
Label points Abbreviation Label specification
(n points) (1st point)
specification
Label data
(nth point)
Binary code
1C 04
H H
Binary code
00 00
H H
Binary code
00 00
H H
Label specification
(nth point)
9 LABEL ACCESS
9.3 Random Read and Write
9
147