Flowserve MX Electronic Actuator - Manual (Page 63)

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Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
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4.14.4 Valve Position
This display will appear only if the function “MID-TRAVEL POSITION” has been selected. Toggle “NO” until the display
indicates the required value of percentage “OPEN” at which the contact should trip. If the contact has been selected as
normally closed, then it will close when the trip point has been reached, with the actuator moving in the open direction.
NOTE: Status contacts (S) and optional alarm (R) contacts are latching type and will remain in their last set position in
the event of a main power supply failure.
4.15 Two-speed Timer (Optional)
The optional two-speed timer extends the operating time of the actuator, in the closing and/or the opening direction,
by pulsing the motor ON and OFF. Pulsing may be applied to full valve travel or only a part of it. The ON and OFF pulse
times are adjustable.
1. Select “CHANGE 2-SPEED TIMERS?”
2. Select “YES” to enter the “CHANGE OPEN TIMER?” routine.
3. If slow opening is required, select “YES;” otherwise select “NO” to move into the “CHANGE CLOSE TIMER?”
routine.
4.15.1 Status
Select “NO” to switch the timer ON or OFF. If OFF, no further menus will be displayed.
4.15.2 Start Position
If the Close or Open timer has been switched ON, pulsing will start when the set point is reached in the selected direc-
tion and the actuator will continue pulsing until the valve reaches the desired “STOP” position.
Select “NO” until the display indicates the required value of percentage OPEN at which the pulsing should start.
Adjustable in 1% increments as listed:
Closing = 0% to 99%. Opening = 1% to 100%.
4.15.3 Stop Position
If the Close or Open timer has been switched ON, pulsing will commence as the valve moves out of its close position
and the actuator will continue pulsing until stopped at the set point.
Select “NO” until the display indicates the required value of percentage open at which the pulsing should stop.
Adjustable in 1% increments as listed:
Closing = 0% to 99%. Opening = 1% to 100%.
4.15.4 Pulse Time – ON
This mode allows user to change the ON pulse time from the default setting.
Default Setting = 2.0 Second
Select “NO” until the required length of ON pulse is displayed. Adjustable between 1 and 20 seconds, in 0.5 second
increments.