West Control Solutions N6600 - Manual (Page 52)

4.4.7.4 ON/OFF DIFFERENTIAL - Word Parameter 17
This word parameter may be modified/interrogated. It defines the switching
hysteresis (for Controllers with an ON/OFF control output - primary or secondary
output). The decimal point position = 1 decimal place.
4.4.7.5 OVERLAP/DEADBAND - Word Parameter 16
Applicable to a dual control output instrument only, this word parameter may be
modified/interrogated. It may be set to positive and negative values (a positive
value indicates overlap, a negative value indicates deadband). The decimal
point position = 0 decimal places.
4.4.7.6 PROPORTIONAL BAND 1 VALUE - Word Parameter 6
This word parameter may be modified/interrogated. This may be set to 0.0 (for
On/Off control) or to a value in the range 0.5% - 999.9% of Output 1 power range.
The decimal point position is set to 1 decimal place.
4.4.7.7 PROPORTIONAL BAND 2 VALUE - Word Parameter 5
For a dual control output instrument, this word parameter may be
modified/interrogated. This may be set to 0.0 (for On/Off control) or to a value in
the range 0.5% - 999.9% of Output 2 power range. The decimal point position is
set to 1.
4.4.8 Status Parameters
4.4.8.1 STATUS - Word Parameter 7
This Read Only word parameter comprises all 16 bit parameters (see Table 4-1)
4.4.8.2 ARITHMETIC DEVIATION (PROCESS VARIABLE - SETPOINT)
VALUE - Word Parameter 4
This Read Only word parameter is the difference between the current process
variable value and the current setpoint value at the instant the message is
received.
4.4.8.3 AM KEY USAGE - Word Parameter 34
This Read Only word parameter indicates the current usage selected for the front
panel AM key:
0 - Output Turnoff
1 - Auto/Manual Control selection
2 - Heater Current display
See also Subsection 3.2.37.
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