Omron C200HW-CORT21-V1, Operation Manual

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IOWR / IORD
Section 5-2
71
IORD (-) @IORD (-)
C C
S S
D D
C Control code
value: Specifies the function to execute (see below)
S Source information
On C200H Alpha PLCs:
value: Combination of the Machine number of the Unit and the
message length (number of words in BCD).
Message length (001 ~ 128)
Machine number (0 ~ F)
On CS1 PLCs:
The Machine Number and message length occupy 2 words:
S: Machine number of the Unit
S+1: Message length (number of words in BCD)
D First destination word
value: The start address of the PLC data area to where the
message from the Unit is to be transferred.
The following table lists the control codes and message lengths for the
C200HW-CORT21-V1.
Function Message Length Control
code
IORD IOWR
Reading the error log #0000 1 - 26 N/A.
Writing to the local object dictionary #0001 N/A. 4 - 7
Reading from the local object dictionary #0002 2 - 5 2
Transmitting a user defined CAN message #0003 N/A. 3 - 6
Receiving a user defined CAN message #0004 N/A. 4
PLC EQ-flag
After the execution of the IOWR or IORD instruction, the PLC EQ-flag is set
when the syntax of the instruction, the control code, and the message length
are valid.
Note
The EQ-flag does not indicate that the content of the message is correct.
Therefore it is important to check the error log during the programming and
testing of the PLC application.