1TT –TIMER + TERMOREGOLATORE - Reference Manual - Pag. 2 di 7
Inputs and Outputs :
The
1TT
device has an input to show the temperature (PV) and two digital outputs (OUT and ALARM).
Timer relay contact
The small clamps are used as in the following table:
1t regulation channel (SP)
Probe input
TC 1 (3 - 4+)
Output
SP (19 - 20)
Alarm
AL (17 - 18)
Timer relay contact
Relè (15 - 16)
Heating control:
If the adjustment channel has been set to heat mode, the temperature control is obtained by the complete PID
algorithm or the ON-OFF algorithm with hysteresis.
The Act parameter must be set to Hot in order to select the heating action: the activation of the control output causes
an increase in temperature because it is connected to a heating element .
The selection is made by setting the proportional band
( PB )
:
•
Setting value 0 ( zero) will enable the ON – OFF adjustment
•
Setting any value other than
0
will enable the PID adjustment
The aforementioned settings are summarized in the table below:
Simbolo
ON-OFF
PID
Proportional Band
PB
If is set to 0 it will enable ON-OFF
PB > 0 – proportional band PID
Integral Time
Ti
Integral Time PID
Derivative Time
Td
Derivative Time PID (Td=-1 automatic Td= Ti/4)
Positive Hysteresis
HSO
> 0.1°C
Negative Hysteresis
HSU
< 0.1°C
Output Time od Cycle
Tc
From 0 (zero) to 999”
