Omron C200HW-CORT21-V1, Operation Manual

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Writing to the local object dictionary
Section 5-5
75
5-5 Writing to the local object dictionary
Control code #0001
The following figure shows the IOWR message structure.
IOWR message structure
word n Index object entry [hex] range: 0000h ~ FFFFh
word n+1 Sub-Index object entry [hex] range: 0000h ~ 00FFh
word n+2 Data length range: 0001 ~ 0008
word n+3
Data byte 2 Data byte 1
word n+4
Data byte 4 Data byte 3
Note:
Data byte 1 is the least
significant byte.
word n+5
Data byte 6 Data byte 5
word n+6
Data byte 8 Data byte 7
The maximum amount of data that can be written to an object entry with the
IOWR instruction is 8 bytes. Data can only be written to object entries with
the attribute WO (write-only), RW (read-write), RWR (read-write on input
application objects), or RWW (read-write on output application objects).
If an object entry is a simple variable, the value for the Sub-Index (word n+1)
should be set to zero.
Refer to the CANopen Communication Profile Specification or the EDS-file
(see appendix A) for the data length of a specific object entry.
Example The following example shows how to store all configuration data in non-
volatile memory (see section 3-3-2-9). In this example, the Machine number
is set to ‘1’.
Note that the C200H syntax of the IOWR instruction is used.
10.00
IOWR (-)
Store_Params #0001 Control code #0001
DM0100 Source of message
#1005 Destination = Mach.No.1
Message length = 5 words
255.06 12.00
EQ_FLAG ERROR
PLC memory address Content Meaning
DM0100 1010 Index 1010h = Store Parameters
DM0101 0001 Subindex 01h = Save all
DM0102 0004 Data length = 4 bytes
DM0103 6173 = 'as'
DM0104 6576 = 'ev'
Data = 6576 6173h = 'evas'