csmstr - Omega Engineering

CSSG – STRAIN GAGE INPUT PID MODULE PROGRAMMING
CRIMSON USER MANUAL - MODULAR CONTROLLER
INPUT FAULT
The Input Fault section is used to define the response of the CSSG module’s control outputs
in the event of an input failure and/or the process value exceeds the PV Limit Low or PV
Limit High values. The Input Fault alarm is considered a process alarm for items that may be
mapped to “any process alarm”.
• The Set Output To property is the output value that the controller will assume in
the event of an input sensor failure. Values in excess of 100% and –100% may
be entered to overcome limitations caused by power transfer values, such as
gains and offsets, which would otherwise limit the output to less than their
maximums.
• The Fault property dictates if a sensor failure on Input 1 alone, or either input, is
required to drive the output to the Set Output To value.
• The Latching property, if enabled, will cause the input fault bits to stay active
until accepted, regardless of the state of the input(s). To accept the fault, the
respective Accept bit must be written to a 1. If latching is not selected, the
fault(s) will automatically deactivate when the input failure(s) is corrected.
THE OUTPUTS TAB
DIGITAL OUTPUTS
• The Output n properties are used to assign the module’s physical outputs to
various internal properties or values.
• The Cycle Time value is the sum of a time-proportioned output’s on and off
cycles. With time proportional outputs, the percentage of output power is
converted into output on time of the cycle time value eg. if the controller’s
algorithm calls for 65% power, and has a Cycle Time of 10 seconds, the output
will be on for 6.5 seconds and off for 3.5 seconds. A Cycle Time equal to, or less
than, one-tenth of the process time constant is recommended.
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