2.8 Communications with an OMRON PLC (FINS Communications Service)
Using I/O Message Communications with the MP3000 as the Master
2-205
I/O Memory Data Areas and Corresponding Registers in the
MP3000
The following table shows the relationship between registers in the MP3000 and the I/O memory data
areas.
When reading from or writing to the I/O memory in the OMRON PLC, the FINS commands for reading or
writing are automatically generated by assigning I/O registers in the MP3000.
•Writing
Set the output register in the MP3000 as follows:
• Set the first address of the OW registers and the size of the data stored in the MP3000 that is to be written
to the OMRON PLC.
• Set the first word to the first register address to write to in the OMRON PLC.
• Reading
Set the input registers in the MP3000 as follows:
• Set the first address of the IW registers and the size of the read data that is to be stored in the MP3000.
• Set the first word to the first register address to read from in the OMRON PLC.
Note: Word: Specify word addresses.
Transfer Size
The following table lists the size of data that can be transferred using I/O message communications. Use
the data size within the ranges that are listed in the following table according to the conditions of the
OMRON PLC slave.
Data Area Name
Data
Type
Data Range
OMRON CPU Unit
MP3000
Addresses
I/O Memory
Addresses
CIO Area Word 0000 to 6143 000000 to 17FF00
Read:
IW0000 to IW7FFF hex
Write:
OW0000 to OW7FFF hex
Work Area Word W000 to W511 00000 to 01FF00
Holding Area Word H000 to H511 00000 to 01FF00
Auxiliary Area Word A000 to A959 00000 to 03BF00
DM Area Word D00000 to D32767 00000 to 7FFF00
Command
Code (Hex)
I/O Memory
Type (Hex)
Meaning Data Size
MR SR
01 01
B0 Reads CIO Area words. 1 to 999 words
B1 Reads Work Area words. 1 to 512 words
B2 Reads Holding Area words. 1 to 512 words
B3 Reads Auxiliary Area words. 1 to 960 words
82 Reads DM Area words. 1 to 999 words
01 02
B0 Writes to CIO Area words. 1 to 996 words
B1 Writes to Work Area words. 1 to 512 words
B2 Writes to Holding Area words. 1 to 512 words
B3 Writes to Auxiliary Area words. 1 to 960 words
82 Writes to DM Area words. 1 to 996 words
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