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6 Message Communications
6-10
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)
Additional Information
The Warning/Alarm details depend on the Communication Unit. Refer to the Unit’s operation
manual.
The MEMORY AREA READ command is used to read the last diagnostics data message the PROFI-
NET IO Controller Unit received from the specified slave device. The command frame requires three
byte data type specifier, specifying the information and one byte specifying the slave device address.
Command Format
Response Format
Parameters
Data specifier code (command)
Defines the data to be retrieved from the Unit. Always set to 00 00 00 (Hex).
Device address (command)
Defines the IO Device network address. Set to 00 to 7D (Hex).
Number of items to read (command)
Defines the number of bytes to read. Set to 00 00 (Hex).
Response Codes
The following end codes can be returned by the Unit in response to the MEMORY AREA READ
command:
6-3-2
MEMORY AREA READ (0101)
Response code
Description
0000
Normal completion.
0101
IO Device not allocated to this CJ1W-PNT21.
1001
Command length exceeded.
1002
Command length too short.
1101
Invalid I/O memory area code (non-specified code).
110C
•
Invalid start address code word (non-specified code used).
•
Invalid target IO Device address (exceeds 126).
Device address
No. of items
(binary)
Command
code
01
01
Data specifier
FF
81
00
Response
code
Command
code
01
01
Data (for number of items)