SITEC S.r.l. Industrial electronics
User Manual TRG 72x72
R2.A
Pag. 21
5.10 P
ERIOD OF THE
PWM
SIGNAL
To set up the period of the PWM signal (output) you have to enter the configuration menu (see paragraph
), enter the
Cyt
), and then select the desired value and save the new value via
the OK key.
When the PID setting is enabled, is generated an output PWM signal (by the 2 relays) by which the output
power is controlled, the duty cycle of this signal is calculated minute by minute by the PID algorithm, while
the period must be set up by the menu, usually we set up a large period when we have to control a slow pro-
cess and, conversely, a small period when we have to control a fast process.
Please note
: The
PWM period can be set up only after having enabled the temperature setting via PID (see
Hereafter the diagram shows a typical behaviour of the PID with PWM output.
5.11 M
INIMUM TIME TO REACTIVATE THE OUTPUTS
To set up the minimum time to reactivate the outputs you have to enter the configuration menu (see para-
graph
), enter the
LP5
level (see paragraph
), and then select the desired value and save the new value
via the OK key.
P.S. time is expressed in seconds.
The minimum reactivation time prevents undesired commutations due to inaccuracy and weak fluctuations
around a single threshold value, protecting the actuators from close-up reactivations.
The protection is delayed after the switching off.
The protection consists in preventing an output activation during the set time (expressed in seconds.), and
counted starting from the last switching off of the output, and therefore that the possible activation takes
place only when time runs out.