Watlow PM PLUS 6, Руководство пользователя

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Watlow PM PLUS™ 6 • 83 • Chapter 8: Features
1. Navigate to
Operations — Setup - Analog Input - Filter
2. Select the filter time interval. Example: With a filter value of 0.5 seconds, if the process input value instantly
changes from 0 to 100 and remained at 100, the display will indicate 100 after five time constants of the filter
value or 2.5 seconds.
Sensor Backup
The sensor backup feature is only available in PM PLUS™ Integrated Limit or Remote Set Point controllers.
Check your product label to confirm that the configuration code shows L or M in the 9th digit: P M 6 _ _ _ _ _
[L,M] _ _ _ _ _
Sensor backup maintains closed-loop control after an input failure by switching control to input 2.
Turn sensor backup on or off
1. Go to
Operations — Setup — Analog Input 1 — Sensor Backup — [Off/On]
2. Scroll to Off or On, press right arrow to select your choice.
3. Press the Home icon to exit.
When Sensor Backup is enabled the Process Value function automatically sets itself to Sensor Backup.
Set Minimum Set Point and Maximum Set Point
Set the minimum set point and maximum set point for the preferred mode of operation:
• Closed loop control
• Manual Power (open loop control)
• Limit, as part of an integrated control
Go to
Operations — Setup — Control Loop —
to enter the Minimum Set Point and Maximum Set Point.
Scale High and Scale Low
When an analog input is selected as process voltage or process current input, you must choose the low and
high values of voltage or current. For example, when using a 4 to 20 mA input, the scale low value would be
4.00 mA and the scale high value would be 20.00 mA. Commonly used scale ranges are: 0 to 20 mA, 4 to 20
mA, 0 to 5V, 1 to 5V and 0 to 10V.
You can create a scale range representing other units for special applications. You can reverse scales from
high values to low values for analog input signals that have a reversed action. For example, if 50 psi causes
a 4 mA signal and 10 psi causes a 20 mA signal.
Scale low and high low values do not have to match the bounds of the measurement range. These along
with range low and high provide for process scaling and can include values not measurable by the controller.
Regardless of scaling values, the measured value will be constrained by the electrical measurements of the
hardware.
Go to
Operations — Setup — Analog Input —
to select the desired values for
Scale Low
and
Scale High
.