Set 1
R
ON
OFF
Diff. 1
OUT 1
ZN
Set 1
R
ON
OFF
Diff. 1
OUT 1
D
Diff. 1
OUT 2
ZN ZN
Set 1
R
ON
OFF
Diff. 1
OUT 1
ZN
Set 1
R
ON
OFF
Diff. 1
OUT 1
D
Diff. 1
OUT 2
ZN ZN
English
Mode PRO=2
1 output
2 outputs
Mode PRO=5
1 output
2 outputs
- 35 -
User Manual – Thermoregulator FHT
If both outputs are used, the hysteresis of each output is equal to half of the
differential. In this case output 1 will turn on when the parameter measured reaches
the value
[ST1]-[DF1]/2
; output 2 will turn off on reaching this value.
Dead-band operation mode [PRO=2]
• When in this mode output 1 operates in
reverse
and output 2 in
direct
.
It is necessary to confi gure parameters set-point 1
[ST1]
, differential 1
[DF1]
and
dead band
[DBN]
, which typify both outputs.
The regulator will tend to keep the parameter within the dead band. Outside the dead
band output 2 will turn on if the parameter tends to increase; conversely output 1
will turn on if the parameter tends to decrease. If only one output is present, it will
operate in
reverse
, with the hysteresis to the left of the value
[DBN]
.
PWM operating mode [PRO=5]
• The regulation logic of this operating mode is the same as that of the dead band
operating mode.
It is therefore necessary to confi gure parameters set-point 1
[ST1]
, differential 1
[DF1]
and dead band
[DBN]
, which typify both outputs. When in this operating mode,
relays are activated by impulses with the timing given by value
[TCL]
(see output
menu).
During that period the relay remains on for a variable length of time that is
proportionate to parameter deviation from the set-point (considering the dead band
when present). Beyond the differential value, the relay remains active 100% of the
time.
