RKC INSTRUMENT REX-F9000, Communication Instruction Manual

Page: 44 / 60

5. LADDER COMMUNICATION
IM9000F02-E2 37
e
ID [Identifier]
These are numbers used for the PLC to identify data to be requested or set to the REX-
F9000.
These are numbers of four figures in the communication identifier list (P.44).
f
CMD [Command]
These are commands used for the PLC to identify the details of processing and the data sing
to be requested to the REX-F9000.
PLC
o
REX-F9000 (During data send from PLC)
Command
(CMD)
Details Identifier transfer order
(0000)
0001
Read request
Upper byte
o
Lower byte
0010 Write request, write data +(Positive)
0011 Write request, write data - (Negative)
0100 Read request (Byte inversion)
1000 Write request, write data +(Positive) Lower byte
o
Upper byte
1100 Write request, write data - (Negative)
Other Usage inhibited
REX-F9000
o
PLC (During data receive by PLC)
Command
(CMD)
Details Identifier transfer order
0000 Read response, read data +(Positive) * 1
0001 Read response, read data - (Negative) Upper byte
o
Lower byte
0010 Write response, write result data + (Positive)
0011 Write response, write result data - (Negative)
0100 Read response, read data - (Negative) Lower byte
o
Upper byte
1000 Read request, write result data + (Positive)
1100 Read request, write result data - (Negative)
Other Abnormal response
* 1 : Data transfer order is in accordance with the command from the PLC connected to the REX-F9000.