AUMA ACVExC 01.2 Series User Manual

9. Failure functions
Definition
Failure functions are started by certain events and lead to a defined action of the
controls or the actuator. A failure operation can be started by a manual action (e.g.
pressing an EMERGENCY stop button). In general, a failure operation is automatically
started by a fault signal from a monitoring function (e.g. loss of signal).
9.1. Reversing prevention time
Application
Prevention of impermissible operation states such as: Operation command in direction
OPEN, actuator still runs in direction CLOSE due to the delay time.
Characteristics
The reversing prevention time (off-time between two operation commands in opposite
direction) prevents a restart for a defined interval once the motor has switched off.
Parameters and instructions for setting
Required user level: AUMA (6).
Device configuration M0053
Switchgear M0173
Revers. prevent. time M0174
Default value: 0.3 s seconds
Setting range: 0.1 … 30.0 s seconds
9.2. Failure behaviour on loss of signal
Characteristics
The failure behaviour can be used to define AC reaction to loss of signal or a defective
signal.
Only in operation mode Remote will the failure behaviour react to a signal loss. In
operation modes Local or Off, there will be no reaction.
9.2.1. Failure behaviour initiation on loss of signal
Required user level: Specialist (4) or higher.
Customer settings M0041
Failure behaviour M0378
Signal loss beh. M0379
Default value: Good signal first
Setting values:
Good signal first
The <Failure behaviour> is only initiated if the monitored signal fails (falling edge).
This setting ensures that if the signal is missing, the actuator will not start when
switching on (Good signal first).
Immediately active
The <Failure behaviour> is immediately initiated if the monitored signal is missing
(is not present).
For the setting Immediately active:
The actuator can start immediately when switching on!
Risk of personal injuries or damage to the valve.
→
Ensure that the signal set under parameter Source M0385 is present when
switching on.
→
Should the actuator start unexpectedly: Immediately set selector switch to pos-
ition Local control (LOCAL) or 0 (OFF).
9.2.2. Failure source (failure reason) for a failure operation: set
Customer settings M0041
Failure behaviour M0378
Source M0385
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Actuator controls
ACV 01.2/ACVExC 01.2 Failure functions

AUMA ACVExC 01.2 Series Specifications

General

Brand	AUMA
Model	ACVExC 01.2 Series
Category	Controller
Language	English