West Control Solutions Pro-EC44, Руководство пользователя

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Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-2 September 2014 Page 47
Input 2 Setup - Sub-menu to setup Input 2. Press
D
+
R
to return to Input Menu
Input 2 Usage w Input 2 can be used as a standard process input for a second control loop
( including its use as part of a cascade ), a redundant input or a feedback
signal input from a valve or flow meter. Redundant or Feedback disables
the input as an independent control loop.
Input Type w If input 2 is selected as a standard process input, select from various
Thermocouple, RTD and Linear mA, mV or VDC inputs. - see specifications
section on page 245, for available input types.
If input 2 is selected as feedback possible types are limited to Linear mA,
mV, VDC or Potentiometer.
Redundant inputs automatically assume the same input type as input 1.
Note: Recheck the units and decimal point settings if you
change the input type.
Engineering Units w Select display units from: °C; °F; °K; bar; %; %RH; pH; psi or none.
Temperature sensor inputs are limited to °C; °F
Decimal Point
Position w
Sets the maximum display resolution to 0; 1; 2 or 3 decimal places.
Numbers >99.999 never display more than 2 dec places, >999.99 never
display more than 1 dec place and >99999 always display without a
decimal place.
Temperature inputs are limited to 0 or 1 decimal place .
Scaled Input Lower
Limit For temperature inputs, upper & lower limits set the usable span. The
minimum span = 100 units, maximum span = range limits for the sensor
type selected -
see specs on page 245 .
For DC linear inputs, the limits define the values shown (-9999 to 9999.9)
when input is at minimum and maximum values. Min span = 100 units.
Scaled Input Upper
Limit
Multi-Point Scaling
Enable Enables or disables multi-point scaling. This allows up to 15 point input
linearization for DC signals -
not possible with temperature sensor inputs
Scaling Point n
If multi-point scaling is enabled, up to 15 breakpoints* can scale input vs.
displayed values between the scaled input limits. Each breakpoint has a %
value for the input signal, and the value to display when the input is at that
value. *A Scaling Point set to 100% input ends the scaling sequence.
Display Value n
CJC Enable/Disable Enables/disables internal thermocouple Cold Junction Compensation. If
disabled, external compensation will be required for thermocouples.
The default value is Enabled.
Input Filter Time Removes unwanted signal noise. Adjustable from 0.1 to 100.0 seconds or
OFF (default = 2s). Use the smallest value that gives acceptable results.
Caution: Large values slow the response to changes in the process.
Set Valve Lower
Position If input 2 is selected as feedback indication, this stores the feedback value
equal to the minimum valve travel. The procedure below moves the valve
to the fully closed position to find the feedback value:
Press
D
and
U
simultaneously to begin feedback limit adjustment.
Press
D
until the valve is closed to its limit of its travel.
Press
D
and
U
simultaneously to store the feedback level.
Set Valve Upper
Position If input 2 is selected as feedback indication, this stores the feedback value
equal to the maximum valve travel. The procedure below moves the valve
to the fully open position to find the feedback value:
Press
D
and
U
simultaneously to begin feedback limit adjustment.
Press
U
until the valve is opened to its limit of its travel.
Press
D
and
U
simultaneously to store the feedback level.