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4 Supplement
4.2.5 Timers
The following functions can be realized when using the binary functions.
Time-limited control
The control is switched off once the timer has elapsed (output level 0 %).
Time-dependent setpoint changeover
After the timer is started, the controller is automatically set to setpoint SP2. Once the timer has
elapsed, the controller automatically switches to SP1.
TIP!
The firing curve can only be started when the actual value is smaller than setpoint 1.
The firing curve is aborted in the event of a probe break, probe short-circuit, over-
range/underrange or change-over to manual mode (controller switched off).
After the power supply is restored, the firing curve is not active (controller switched
off).
When the firing curve is not active,
OFF appears in the lower display.
(A) Without tolerance band
(B) With tolerance band
SP1 Setpoint 1
tOLt Tolerance band
t1 Timer value
S Start (manual)
(A) Manual start
(B) Automatic start after
power ON
(C) Manual start with
tolerance band
SP1 Setpoint 1
SP2 Setpoint 2
tOLt Tolerance band
t1 Timer value
PPower ON
S Start (manual)