West Control Solutions 8700+ - Manual (Page 150)

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- DIN Controllers & Indicators - Product Manual
59305, Issue 7
– March 2014 Glossary Page 145
calculating how long to energise the “Valve Open” or “Valve Close” outputs to bring the
process on to control.
It is important that this time accurately reflects the time taken to travel between the physical
limits otherwise control will be impaired. The motor travel time should be stated in the valve
specification or can obtained from the supplier or manufacturer. Failing that, the valve should
be timed from the fully closed to fully opened position. The controller can be placed in
Manual Mode to assist with the timing of valve movement.
Display code =
,
default setting =

.
.
Also refer to Manual Mode Enable, Minimum Motor On Time and Valve Motor Drive Control.
Multi-Point Scaling Enable Type: Indicator Parameter
When an Indicators Multi-Point Scaling function is enabled by setting
 to 
in
Configuration Mode, up to 9 breakpoints can be defined to linearize the input signal. This
only applies to mA, mV or Voltage input types. For each breakpoint, an input scale value is
entered, followed by the value to be shown at the breakpoint.
Display code =
,
default setting =

Also refer to Indicator, Multipoint Scaling Set Up and Process Variable.
Multi-Point Scaling Set Up Type: Indicator Parameter
For each breakpoint, the input scale value (n) is entered as a percentage of the input
span, followed by the value to be shown (n) in display units, for this input value.
Each breakpoint’s input scale value must be higher than the previous value, but the display
values can be either higher or lower. This procedure is repeated for up to nine breakpoints,
but if any scale value is set to 100% if automatically becomes the last in the series.
Also refer to Indicator, Multipoint Scaling Enable and Process Variable.
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