csmstr - Omega Engineering

MODULE CONFIGURATION
CSSG – STRAIN GAGE INPUT PID MODULE PROGRAMMING
• The Output Deadband property defines the area in which both the reverse and
direct outputs are inactive, known as deadband, or the area in which they will
both be active, known as overlap. A positive value results in a deadband, while a
negative value results in an overlap.
• The Output Reverse Gain defines the gain of the reverse output relative to the
gain established by the Proportional Band. A value of 100% causes the reverse
gain to mimic the gain determined by the proportional band. A value less than
100% can be used in applications in which the output device is oversized, while
a value greater than 100% can be used when the device is undersized. For the
majority of applications the default value of 100% is adequate, and adjustments
should only be made if the process requires it.
• The Output Direct Gain defines the gain of the direct output relative to the gain
established by the Proportional Band. A value of 100% causes the direct gain to
mimic the gain determined by the proportional band. A value less than 100% can
be used in applications in which the output device is oversized, while a value
greater than 100% can be used when the output device is undersized. For the
majority of applications the default value of 100% is adequate, and adjustments
should only be made if the process requires it.
• The Reverse Low Limit and Reverse High Limit properties may be used to limit
controller power due to process disturbances or setpoint changes. Enter the safe output
power limits for the process. You may enter values in excess of 100% and –100% 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 Direct Low Limit and Direct High Limit properties may be used to limit
controller power due to process disturbances or setpoint changes. Enter the safe output
power limits for the process. You may enter values in excess of 100% and –100% to
overcome limitations caused by power transfer values, such as gains and offsets,
which would otherwise limit the output to less than their maximums.
TRANSFER GRAPH
The power transfer graph illustrates the results of changes made to the power settings. The
blue line represents the direct output, while the red line represents the reverse output.
REVISION 6 PAGE 39