Serial Communications
8-7
G File Configuration
The SLC system uses G files to configure the R I/O link. G files are
configured through the SLC programming software. The
configuration is based on the devices connected to the R I/O link. For
this example, the following G file configuration map for the scanner’s
I/O image file of the SMC Dialog Plus controller applies.
①
Words 3 and 4 do not require configuration since the communication module does not support
Complimentary I/O.
I/O Addressing
The 1203-GD1 communication module uses 1-slot addressing. Based
on the module switch settings as described above, the discrete I/O can
be mapped to the PLC I/O Image as shown below.
SLC I/O Image Table Map
①
The output image word that maps to the Reference word (O: 1.17, in this example) must have the
value 0 to insure proper SMC Dialog Plus controller operation.
Addressing Format
Address
①
15 Data 0 Description
G1:0
G1:1
G1:2
xxxx
0000
0000
xxxx
0001
0001
xxxx
0000
0000
xxxx
0000
0000
Word 0 cannot be edited
Logical device address (rack 2, start group 0)
Logical image size (1/4 rack)
SLC I/O Group Number Output Image Input Image
0 Logic Command Logic Status
1
Reference
①
Feedback
I
for input or
O
for output
Slot number
Word number
Input or output number
(bit identifier: 0–15)
I : 1 0/12
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