Chapter
5
Technical Information
HC8X Heat Control
5-34
©
SICK AG · All rights reserved
8010043
Start-up
5.4
Control Process
An exemplary control process is shown in Fig. 5-1 . The interactions of the individual control
parameters in the heating types H1, T1 and B1 are shown in a time sequence.
Fig. 5-1:
Control Process
T
ctrl
T
ctrl
+T
ulim
T
act
[ C]
T
ctrl
-T
llim
T
ctrl
-T
hyst
T
ctrl
+T
hyst
TL
O
TBB
TAB
TH
I
ERR
ALR
HEN
HON
HEN
HON
HEN
HON
Heizungsart H1
Heizungsart T
1
Heizungsart B1
ALR
= Alert
(Alarm)
ERR
= Error
(Error)
HEN
= Heating Enabled
(Heater safety relay)
HON
= Heating On
(Heater working relay)
TAB
= Temperature Above Hysteresis Band(Temperature > req. temp.+hyst.)
TBB
= Temperature Below Hysteresis Band (Temperature < req. temp.– hyst.)
THI
= Temperature High
(Temperature > req. temp.+upper limit)
TLO
= Temperature Low
(Temperature < req. temp.– lower limit.)
If the temperature T
ctrl
+ T
ulim
(see Fig. 5-1) is exceeded:
Acknowledge the error with the slide switch (see Chapter 5.1.1 Setting the HC8X Mode,
– or –
Perform a software reset via the measuring system PC.