West Control Solutions N8100 - Manual (Page 34)

3.3.5 Tuning Parameters
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Parameter Identifier Description
Rate (Derivative
Time Constant)
D May be read/modified using a Type 2 message or a
Type 3/Type 4 message sequence. Defines the
derivative time constant for the control algorithm.
{DATA} is of the form mm.ss where mm = minutes
and ss = seconds. The decimal point position must
specify two decimal places, otherwise modification
will not occur.
Reset (Integral
Time Constant)
I May be read/modified using aType 2 message or a
Type 3/Type 4 message sequence. Defines the
integral time constant for the control algorithm.
{DATA} is of the form mm.ss where mm = minutes
and ss = seconds. The decimal point position must
specify two decimal places, otherwise modification
will not occur. 1
Manual Reset
(Bias)
J May be read/modified using a Type 2 message or a
Type 3/Type 4 message sequence. Decimal point
position is as for input range.
ON/OFF
Differential
F May be read/modified using a Type 2 message or a
Type 3/Type 4 message sequence. Defines the
switching hysteresis for controllers with an ON/OFF
control output. Decimal point position = 1.
Overlap
/Deadband
K May be read/modified using a Type 2 message or a
Type 3/Type 4 message sequence. May be set to a
positive (overlap) or negative (deadband) value.
Decimal point position = 0. 2
Proportional
Band 1 value
P May be read/modified using a Type 2 message or a
Type 3/Type 4 message sequence. May be set to
0.0 (ON/OFF control) or within the range 0.5% -
999.9% of Output 1 power range. Decimal point
position = 1.
Proportional
Band 2 value
U May be read/modified using a Type 2 message or a
Type 3/Type 4 message sequence. May be set to
0.0 (ON/OFF control) or within the range 0.5% -
999.9% of Output 2 power range. Decimal point
position = 1. 2