138
Communicating between OMRON PLCs Section 6-6
Note 1. The maximum data length is limited to 512 bytes for data exchange be-
tween the PLC and SYSMAC LINK Systems or the PLC and SYSMAC
BUS/2 Remote I/O Systems.
2. When broadcasting, do not require a response.
Use the FINS/UDP method for broadcasting.
6-6-2 PLC Communications Data Areas
The following table shows the I/O data areas involved when SEND(090) and
RECV(098) are used.
Note 1. Data cannot be written to words A000 to A447 in the Auxiliary Area.
2. A maximum of 13 banks in the EM Area can be used. For details regarding
the EM Area, refer to the operation manual for the PLC that is used.
Data contents The following data is sent and received with the execution of
each instruction.
SEND(090):
Sends request for remote node to receive data, and receives
response data.
RECV(098):
Sends request for remote node to send data, and receives
response data.
CMND(490):
Sends any FINS command and receives response data.
Communications
port number
Ports 0 to 7 (Eight transmissions can occur simultaneously.)
Response moni-
tor time
0000:
2 s (default)
0001 to FFFF:
0.1 to 6,553.5 s in 0.1-s increments (specified by user)
Number of retries 0 to 15 retries
Item Specifications
Area Range
CIO Area CIO 0000 to CIO 6143
Work Area W000 to W511
Holding Area H000 to H511
Auxiliary Area A000 to A959 (See note 1.)
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D00000 to D32767
EM Area E00000 to E32767 (See note 2.)
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