User manual MKA 120
Conforms to
Issue 07.07.2021_01 Page 16
5.6.4 Optionale control loops
Up to 3 optional regulator can be programmed. The configuration determines which nominal
values may be entered and they can vary depending on the system. In this way the end user has
the option of programming the nominal values of these regulators in the different program steps.
.
Be aware
The configuration of the individual regulators depends on the significance of the nominal
values that are entered.
If additional control loops or additional sensors have been configured for the process that is
currently in operation, their current temperature values (
actual values
) will be displayed.
Item 7.1.4 Optional nominal values, p.19
5.7 Shut-down condition
As soon as at least one of the shut-down conditions has been fufilled, the program step will end.. If
a nominal value has not been pre-programmed
(OFF)
the related switch-off condition is also de-
activated.
Shut-down conditions are:
▪
Nominal step time has elapsed and has reached 00.00
▪
Nominal core value has been reached
▪
Negative core shut-down
(cooling, e.g. shower)
▪
Nominal FC-value has been reached
Unplanned shut-down if:
▪
„Stop“ button is pressed which leads to a program termination
▪
There is a temperature sensor fault which always leads to a program termination
▪
There is a core sensor fault, program termination only when a nominal value has been pre-
programmed
Be aware
An empty
(not valid)
program step will be immediately terminated or not even started. A
program step is considered valid when a process has been pre-programmed.
5.8 Negative core shut-down (Shower/Cooling)
In order to pre-program a
negative core shut-down
the nominal
temperature
value you enter has
to be lower than the nominal core temperature value.
The program step will end when the actual core temperature falls below the nominal core
temperature. If an operating time has also been entered, the program step will end when the
operating time has run out
or
when the actual core temperature falls below the nominal core
temperature. This means the program step will end when at least one of the shut-down conditions
has been fulfilled.
5.9 Pre-heating function
The pre-heating function has an influence on how the step time is counted while a program is
running. When this feature is activated, the controller only starts counting the step time when the
nominal chamber temperature has been reached
for the first time
.
(„Act. temp“ is higher than
nominal value
„Temp min“).
There are two possible settings:
1) The program which is currently in operation is not interrrupted and the step time counter starts
automatically.
