8-20 Serial Communications
1560D-UM051D-EN-P – February 2005
Remote I/O Examples (cont.) Example #3 – PLC 5/20, 5/40, 5/60 and 5/80
This example demonstrates PLC control of an SMC Dialog Plus™
Controller with the Pump Control option. Use of the Option Command
bit to initiate the pump stop maneuver is also shown. Finally, the SMC
fault bit is monitored as a conditional logic input for the block transfer of
the associated fault code stored in the SMC Dialog Plus controller's
Parameter 19, Fault Buffer #1. Many of the selections shown are example-
specific. Some changes by the user may be necessary to apply the
concepts of this example to a specific application.
System Configuration
Remote I/O Link
SMC Dialog Plus
Controller
1203-GD1
Rem I/O
Rem I/O STS
Rem I/O ACT
Health
SCANbus STS
FAULT
2
SH
1
V+
V-
L1
1
L2
3
L3
5
11
21
12
22
13
23
14
24
15
25
16
26
17
27
18
28
19
29
20
30
G
Communication Module
Bulletin 1202 SCANport Cable
PLC 5/20, 5/40. 5/60, or 5/80
Note: It is critical that, during the system design phase, each device on
the Remote I/O link is allocated a unique segment of the PLC's I/O
image table. This is accomplished by coordination of the device's
rack address, rack size and starting group address.
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