SITEC S.r.l. Industrial electronics
Pag. 14
R2.A
User Manual TRG 72x72
5.3 C
HANGE THE TYPE OF SETTING
To set the type of temperature control you have to enter the configuration menu (see paragraph
), enter
the
rEG
level (see paragraph
), and then select
OnF
to start the temperature setting by On / Off, or
P1d
to
start the temperature setting by PID.
5.3.1 - On/Off Setting
The (On/Off) setting is used for its ease, when you can set the temperature less precisely; consider that it is
not desirable to have a too small hysteresis in order to avoid an excessive frequency in the intervention of
the final setting element that, in case of a relay, could rapidly wear out.
5.3.2 - PID Setting
The temperature setting via PID allows to obtain an accuracy significantly higher than the simple On / Off
control, the calculation of the PID is done by adding the contributions of the proportional (see paragraph
),
integral (see paragraph
) and derivative effect (see paragraph
In this case, being available 2 output relays, a PWM signal is generated by these relays, of which is calculat-
ed the duty cycle, minute by minute, by the PID algorithm, while the period of the PWM signal can be set-up
by the menu (see paragraph
With the PID setting the 2 outputs always behave the same way, switching on and off always at the same
time, namely there is no difference between the 2 outputs.
