csmstr - Omega Engineering

CSTC/CSRTD – TEMPERATURE INPUT MODULE PROGRAMMING
CRIMSON USER MANUAL - MODULAR CONTROLLER
APPLICATION EXAMPLE
The PV reading from a thermocouple is 3 degrees lower than the actual temperature when the
process is at 200 degrees. It reads only 1 degree lower than the actual temperature when the
process is at 300 degrees.
Desired PV = (PV x Slope) + Offset
Slope = 300-200 = 0.980
299-197
Offset = 200 – (0.980 x 197) = 6.940
A Slope value of 0.980 and an Offset value of 6.940 corrects the sensor error.
AVAILABLE DATA
The following are the data values available to the Master, and therefore, may be mapped to
PLC registers.
INPUT/STATUS
DATA DESCRIPTION RANGE ACCESS
PV1 – 8 Process Value – after Slope and Offset calculation * R
ColdJunc** Cold Junction Calibration Value N/A R
InputAlarm1 – 8 Input out of range 0 or 1 (bit) R
* Dependent on selected sensor type.
** Model CSTC only.
INPUT/CONTROL
DATA DESCRIPTION RANGE ACCESS
InputFilter Input Filter 0 – 60.0 sec R/W
InputOffset1 – 8 Offset value added to PV +/- 100.0 deg R/W
InputSlope1 – 8 Slope value applied to PV .001 – 10.000 R/W
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