Installation manual

Series C Controller Configuration and Operation Manual
12-2  Athena Controls, Inc. 900M050U00
12.2 Specifying What Happens When an Input Is Bad
The failsafe output percentages are used when the controller detects a problem with the
input: open sensor, reversed sensor, or loop break time exceeded. You cannot rely on
the controller using these output percentages if the controller’s internal circuitry fails.
Parameter Name
: Output 1 Failsafe Output Percentage (E1) and Output 2
Failsafe Output Percentage (E2)
Name as Displayed
:
FS.01FS.01 and FS.O2FS.O2
Used By:
all controllers
When Displayed:
if output type is PID or on/off
Range:
0 to 100% (output high limits O1.HLO1.HL and O2.HLO2.HL are ignored when
the controller is in the failsafe state)
Default:
0
Description:
Used to specify the fixed output percentage the controller will
use if it detects a problem with the input.
12.3 Defining the Loop Break Time
The loop break time parameter is used to specify the length of the time period during
which the input should change in response to output action if the input is working
normally. The controller will use this loop break time as a criterion for going into failsafe
state and sending the outputs to the failsafe output percentages.
Parameter Name
:
Loop Break Time (E3)
Name as Displayed:
L.br.tL.br.t
Used By:
all controllers
When Displayed:
always
Range:
offoff, 4 to 9600 seconds
Default:
off
Description:
Used to specify the time period during which the input should
change in response to output action if the input sensor is
working correctly.