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8.5.4
X.TIME - limitation of control speed
If the actuator speed is to be limited, smaller actuator speeds can be entered. The following settings are
possible via the Bürkert Communicator:
Operating mode
Slow 2
Slow 1
Normal
Faster
8.5.5
DIR.CMD -Effective direction of the positioner set-point value
This auxiliary function allows you to set the effective direction between the input signal (INP) and the set-
point position (CMD) of the actuator.
Set-point position (CMD)
Valve open
Valve closed
Fig. 14:
Effectivedirectiondiagram
8.5.6
SAFEPOS - Entering the safety position
SAFEPOS at büS/CANopen
It can be entered how the actuator should behave in the event of communication failure. It is possible to let
the actuator move to any position or to remain in the current position.
SAFEPOS when using the energy storage module (capacitive buffer module ID 773 440)
Enter the safety position.
In order to be able to start a safety position of the valve in the event of a power failure, the valve must be sup-
plied with voltage via the capacitive buffer modules. In the event of a power failure, the buffer module provides
an output voltage of 18 V DC for a few seconds. The reduced input voltage is detected by the valve and the
safety position is approached accordingly. It is possible to let the actuator move to any position or remain in
the current position. This Safepos function has the highest priority.
SAFEPOS at < 4 mA standard signal input of the safety position
With set-point value input 4...20 mA, if the input signal falls below 4 mA (signal error detection), it is possible
to enter how the actuator should behave. It is possible to let the actuator move to the respective end positions
or to remain in the current position.
32
100%
0%
0 mA, 4 mA,
0 V
english
Type 3281
Start-up
Max. control speed [sec.]
3.2
2.8
2.5
2.2
Rise
Fall
Standard signal
20 mA,
5 V, 10 V
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