Command / Response Reference - Omron PROFINET IO CJ1W-PRM21 Operation Manual

Command / Response Reference

6-2 Command / Response Reference
Note
6-2-1 MEMORY AREA READ (0101)
Command Format
Response Format
Parameters
This section describes the FINS commands that can be sent to the PROFINET
IO Controller Units and the responses to each command.
The command, response, and (where applicable) the results storage blocks
are given with the commands in graphic form as shown in the following
diagram. If the data is fixed, it is included in the blocks. If the data is variable, it
is described following the blocks. Each box represents 1 byte; two boxes
represent 1 word. The following diagram shows 2 bytes, or 1 word
Response codes applicable to the command are described at the end of the
command description.
If the FINS command was not completed normally, the 2-byte Response
code will be unequal 0000, and the Response frame will not contain any
further data. Data can only be returned - depending on the command -
when the Response code is 0000.
The MEMORY AREA READ command is used to read the last Alarm data
message the PROFINET IO Controller Unit received from the specified IO
Device. The command frame requires three byte data type specifier,
specifying the information, and one byte specifying the slave device address.
01
Command
code
Figure 6.5: Memory Area Read command
01 01
Command
code
Figure 6.6: Memory Area Read response
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's FINS network address. Set to 00 ~ 7D (Hex).
Number of items to read (command)
Defines the number of bytes to read. Set to 00 00 (Hex).
Two bytes
Figure 6.4: Storage block
01 00 00 00
Data specifier
Device address
Response Alarm data
code
Section 6-2
00
00
No. of items
(binary)
77