ControlMaster CM30, CM50 and CMF310
Universal process controllers,
1
/4,
1
/2 DIN and fieldmount 8 Templates and Functionality
IM/CM/ED–EN Rev. X 89
8.2 Standard Templates
8.2.1 Auto / Manual Station (Low Signal Selection / Digital Signal Selection)
This template configures the ControlMaster as a back up for a Master Controller (system). In normal
operation the ControlMaster's current output follows the master controllers output value in Automatic
mode. Upon detection of a fault in the Master system, which is identified by either a low signal value on the
Master Output or via a digital Input signal, the ControlMaster selects Manual Mode with either the last valid
Master Output value or a pre-configured fixed output value. Once the Master signal is restored or the digital
input state returns to its normal state the ControlMaster switches back to Auto Mode and continues to
follow the Master Controller output.
(See Fig. 8.1, page 91 for details of parallel connection).
PV
AIN 1
AIN 2
DIN 1
Alarm 1
1 Low Signal Selection
2 Digital Signal Selection
AO1
Manual Output
1
2
A/M
Master Output
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