West Control Solutions ProVU 4 - Manual (Page 136)

ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
59407, Issue 1 – March 2008 Glossary Page 135
Auxiliary Input
Up to two secondary linear input modules can be installed in Option Slot A and B. These can
be used as Remote Setpoint inputs. Signals can be mA, mV, VDC or Potentiometer. Auxiliary
Input B also has a Digital Input onboard.
Also refer to: Alternative Setpoint, Digital Input, Linear Input, mADC, mVDC, Remote
Setpoint and VDC
Auxiliary Input Lower Limit
When the auxiliary input is used to provide a Remote Setpoint (RSP), this setting defines the
value of the RSP when the input signal is at its minimum value (e.g. for 4 to 20mA, the value
when 4mA is applied). It may be adjusted within the range -1999 to 9999. However, the RSP
value is always constrained within the Setpoint Upper Limit and Setpoint Lower Limits.
Settings = -1999 to 9999
Default Value = Scale Range Lower Limit.
Also refer to: Auxiliary Input, Auxiliary Input Upper Limit, Auxiliary Input Offset, Remote
Setpoint, Setpoint and Setpoint Upper Limit and Setpoint Lower Limit.
Auxiliary Input Offset
Used to adjust the value of the Auxiliary Input. Positive values are added to the auxiliary
input reading, negative values are subtracted. It is adjustable in the range –1999 to 9999.
When the auxiliary input is used to provide a Remote Setpoint, this setting is added to (or
subtracted from) the remote setpoint value, but the setpoint is still constrained by the setpoint
upper and lower limits.
Settings = ±input span
Default Value = Off.
Also refer to: Auxiliary Input, Remote Setpoint, Scale Range Upper Limit, Scale Range Lower
Limit Setpoint Lower Limit and Setpoint Upper Limit.
Auxiliary Input Type
Defines the type and range of the linear input signal for the Auxiliary Input. It can be mADC,
mVDC, VDC or potentiometer (mVDC and potentiometer are only available with the Full
Auxiliary input in option slot B). This can be used as a Remote Setpoint input.
Also refer to: Remote Setpoint and Setpoint.
Auxiliary Input Upper Limit
When the auxiliary input is used to provide a Remote Setpoint (RSP), this setting defines the
value of the RSP when the input signal is at its maximum value (e.g. for 4 to 20mA, the value
when 20mA is applied). It may be adjusted within the range -1999 to 9999. However, the
RSP value is always constrained within the Setpoint Upper Limit and Setpoint Lower Limits.
Settings = -1999 to 9999
Default Value = Scale Range Lower Limit.
Also refer to: Auxiliary Input, Auxiliary Input Lower Limit, Auxiliary Input Offset, Remote
Setpoint, Setpoint and Setpoint Upper Limit and Setpoint Lower Limit.
Band Alarm Value
The amount of control deviation that is acceptable before a Band Alarm is activated. If the
process variable is more than the value of this band from the actual setpoint, the alarm will
be active.
Settings = 1 LSD to full input span from the setpoint.
Default value = 5 LSD’s.
Also refer to: Actual Setpoint, Alarm Operation, Alarm Types, Control Deviation, Input Span,
LSD and Process Variable.