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...2 OPERATOR LEVEL
2.3 Auto/Manual Station (Templates 3 and 4)
Note. Refer also to Appendix A2.1 – Series and Parallel Operation.
The auto/manual station provides a backup for a master controller. In normal operation the
COMMANDER 500's analog output follows the master controller's output value. A fault in the master
system can be identified either by detecting a low signal on the master output (template 3) or via a
digital signal (template 4). When a fault is detected the COMMANDER 500 goes into manual mode
with its output either set to the last valid master output value or to a configured output value – see
Section 4.6, Control Configuration/ Configured Output 1. When the master output is restored or the
digital input returns to its inactive state, the COMMANDER 500 switches back to auto mode.
Note. The Alarm A1 Trip value must be set when using template 3.
Master Output
I/P2
Digital Select
di1
•1 Template 3 Only
•2 Template 4 Only
14
Manual Output
•1
Low Signal Select
(Alarm A1)
•2
Fig. 2.3 Auto/Manual Station
Auto / Manual
Select
Analog Output
ao1
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