Watlow CLS200, MLS300 and CAS200 - Manual (Page 60)

54 Communications Specification
Chapter 3: Controller Parameter Descriptions
(3) If the original precision value (from the table below) was a negative
number, round the number to the nearest integer. Otherwise, display
the number.
Exception
For the deviation band alarm, heat/cool spread, and alarm deadband
parameters, follow the procedure above, but if the precision value from
the table is negative, display the raw number read from the controller.
Display Format Menu
When users edit the controller’s Display Format menu for a linear input,
they are really editing the precision for that input.
The next table shows the available precision values:
Cycle Time (20)
This parameter contains the time proportioning time base, expressed in
seconds.
• Range: 0 to 255 seconds.
• Heat: 10.
• Cool: 3.
Zero Calibration (21)
This parameter returns the controller’s zero calibration counts.
Full Scale Calibration (22)
This parameter returns the controller’s full scale calibration counts
Digital Inputs (25)
This parameter returns the state of the controller’s digital inputs. If the
input is an open circuit (high) the corresponding value returns a 1. If the
input is connected to common or low a 0 is returned.
Precision
Value
Display Format
Sample Raw Value Read
via Communications
Scaled
Display Value
–1 –999 to 3000 2556 257
0 –9999 to 30000 2556 2556
1 –999.9 to 3000.0 2556 255.6
2 –99.99 to 300.00 2556 25.56
3 –9.999 to 30.000 2556 2.556
4 –0.9999 to +3.0000 2556 0.2556