SMC Networks EX500 - Manual (Page 21)

EX500 Serial System EX## - OME0008
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4 -4 -3. Terminating resistance setting switch ( SW3 )
Set termination resistance.
Data Rate
57.6 k bit / sec. : 150Ω
115.2 k bit / sec. : 150Ω
230.4 k bit / sec. : 82Ω
4 -5. Layout of scanner I/O
I/O mapping image at the Gateway (GW ) Unit communication port is shown in examples 1 and 2.
In this product, regardless of the quantity of the I/O equipment, continuous 4 Groups are automatically
occupied. ( 1/2 RACK occupation ).
Each communication port occupies all of 16 points in corresponding Group.
State of SW3
① 150Ω ② 82Ω ③ No resistance
Ex.1 ) RACK Address = 0
Starting Quarter = First
Bit Number( decimal ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RACK0 Group0 COM A occupied
RIO RACK0 Group1 COM B occupied
LOGICAL RACK0 Group2 COM C occupied
RACK0 RACK0 Group3 COM D occupied
RACK0 Group4
RACK0 Group5
RACK0 Group6
RACK0 Group7
RACK1 Group0
RIO RACK1 Group1
LOGICAL RACK1 Group2
RACK1 RACK1 Group3
RACK1 Group4
RACK1 Group5
RACK1 Group6
RACK1 Group7
Ex.2 ) RACK Address = 1
Starting Quarter = Third
Bit Number( decimal ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RACK0 Group0
RIO RACK0 Group1
LOGICAL RACK0 Group2
RACK0 RACK0 Group3
RACK0 Group4
RACK0 Group5
RACK0 Group6
RACK0 Group7
RACK1 Group0
RIO RACK1 Group1
LOGICAL RACK1 Group2
RACK1 RACK1 Group3
RACK1 Group4 COM A occupied
RACK1 Group5 COM B occupied
RACK1 Group6 COM C occupied
RACK1 Group7 COM D occupied