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11. Alarms / Failures

11.1 Definition

11.1.1

Alarms

The actuator / electronic unit is exposed to critical conditions (e. g. high temperature) which currently

do not affect the actuator, the electronic unit, the process or persons. The actuator functions are still

available. Previous alarms are saved in the „Saved Alarms" memory of the electronic unit. Use the con-

figuration software to display the current and saved alarms.

11.1.2

Failures

The actuator / electronic unit is exposed to critical conditions (e. g. setpoint monitoring signal) which

instantly might affect the actuator, the electronic unit, the process or persons. The actuator will be

switched off and the actuator functions are no longer available. Previous failures are saved in the

„Saved Failures" memory of the electronic unit. Use the configuration software to display the current

and saved failures. Failure messages can not be reset as long as the reason for the failure exists.

11.2 Alarm scheme

setpoint monitoring

upper limit

lower limit

monitoring

actuator

stop

safety pos.

last setpoint

Fig. 14:

transmitter

maintenance

monitoring

upper limit

lubricants / elastom.

lower limit

motor / gearing

process contr.

Alarm Signal

temperature

actuator

electronics

(high / low)

behav. at crit.

temp.

MAN

AUT

actuator runs

in selected

mode

saved alarms

(reset option)