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IQ3 Full Configuration Manual – Section: Settings
31
2.3.3 Control – Interrupter Timer
Settings
Limits
Indication
Control
ESD
Security
Defaults
Control
Local
Remote
Interrupter Timer
Positioning
Start
Open
Close
Closing
30%
Opening
70%
On Time (s)
2
Off Time (s)
2
Effct. Speed %
50
1/6
The Interrupter Timer is an optional extra. When enabled,
it will be included in the control menu.
To enable the Interrupter Timer contact Rotork.
Introduction
The Interrupter Timer allows the valve operating time to be
increased. This is used, for example, to prevent hydraulic shock
("water hammer") when closing or to prevent surges when
opening a valve. The Interrupter Timer is active in both local and
remote control. It may be overridden during an ESD operation,
refer to 2.4
The IQ is a single speed machine so to increase the valve
operating time the timer stops and starts the actuator
automatically – timed operation. The timer can be set to operate
over all, or a portion of the closing and/or opening strokes.
1/6
Start
Timed operation start position.
Close (Default)
– Timed operation to and from the Closed
Limit. The Interrupter Timer will start timed operation, in the
close direction, at the position set for Closing. It will stop timed
operation, in the open direction, at the position set for Opening.
Open
– Timed operation to and from the Open Limit. The
Interrupter Timer will start timed operation, in the open
direction, at the position set for Opening. It will stop timed
operation, in the close direction, at the position set for Closing.
To change the settings use, . The checkbox will
indicate the selected Interrupter Timer start limit.
PLEASE NOTE the shaded area of the slider control for
Closing and Opening will be the timed section. If timed
operation is no longer required, Closing and Opening
positions should both be set to 0% or 100% depending on
the Start setting value.
2/6
Closing
The position where the Interrupter Timer will start/stop timed
operation in the close direction. If timed operation is not required
in the close direction (actuator runs at normal speed), set to 0%
when 1/6 is set to Close and 100% when 1/6 is set to Open.
3/6
Opening
The position where the Interrupter Timer will start/stop timed
operation in the open direction. If timed operation is not
required in the open direction (actuator runs at normal speed),
set to 0% when 1/6 is set to Close and 100% when 1/6 is set to
Open.
To change the settings use, . The slider control
will indicate the selected start/stop.
Example:
To prevent hydraulic shock the valve must be closed
slowly and therefore timed operation is required from the 25%
open position to Closed Limit. Timed operation is not required at
all when opening, the actuator will run at normal speed for the
complete opening valve stroke.
Set:
Start – Close
Closing – 25%
Opening – 0%.
4/6
On Time (s)
This is the actuator run time during timed operation. Range 2 to
100 seconds.
5/6
Off Time (s)
This is the actuator pause time during timed operation. Range 2
to 3600 seconds.
To change the settings use, . The on/off times
set will be indicated.
WARNING! To minimise wear to the actuator, it is
advisable to limit the number of start/stops set with the
Interrupter Timer function. Using longer durations for On
and Off times can achieve the specified valve operating
time whilst reducing the number of starts required to
achieve it.
6/6
Effective speed
Non-editable. Automatically indicates the effective speed of the
actuator over the timed portion(s) for the set on and off times.
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