Bentrup TC 2010 Bedienungsanleitung Seite 36

1 "2 hours up to 500°C". Assuming a kiln temperature of 250°C when starting the
firing, the time is reduced to 1 hour (causing a setpoint of 250°C)
01: monitor lp
Adjust the loops to be monitored for process problems. This allows to pick only the
loop(s) which are relevant for the process. Either a single loop or a range of loops
(e.g. ch00 to ch02 on a 3 zone kiln, entered as " ch02") can be selected.
02: temp match %o
An uncontrolled ramp (SKIP) is terminated if the actual temperature matches the
final segment temperature. Since the controller slows down temperature towards
the end to avoid over/undershoot it might take more time to reach the
temperature. Use this parameter to specify when the segment temperature is
considered as reached. Example: 2.0 ppm of 1320°C (max. loop temperature) =
2.64°C, SKIP segment ends at 997.36°C assuming a final ramp temperature of
1000°C
03: num of matches
An uncontrolled ramp (SKIP) is completed if the temperature matches the specified
number of cycles (0.5s each). This ensures a segment is not terminated if the
temperature overshoots for a short period. Example: Setting of 6 waits for 3
seconds to complete the current segment assuming the temperature matches
continuously
04: end of SKP seg
An uncontrolled ramp (SKIP) usually is only completed if the actual temperature
reached the final ramp temperature. The following options are considered:
DISR: Causes the controller to disregard the temperature, ie. to leave a SKIP
segment immediately
WAIT.X: Causes the controller to wait for temperature match, but maximum for
the specified time (see next parameter). This option is strongly recommended on
multi zone kilns, e.g. at a time of 10 minutes. Otherwise the process might
deadlock itself. For instance in a cooling SKIP, the thermocouple of zone 2 has a
little deviation and therefore zone 2 is heated 4°C higher; if the heating affects
zone 1 this zone will never cool down as neccessary. The time begins to count if the
operating instructions bentrup TC20xx V1.9
(value range CH01 to CH01 )
(value range 0.0 to 100.0)
(value range 1 to 250)
(options DISR, WAIT.X, INFIN)
first zone starts to control. Once the time is elapsed the segment is finished
disregarding the zone temperatures
INFIN: Causes the controller to wait for temperature match for infinite time
05: max wait (sec)
wait time in seconds for the feature specified previously
06: act.on LP unco
In a controlled ramp it might happen that the kiln temperature can not follow the
requested increase although the controller asks for maximum heating (resp. the
requested decrease in a cooling segment). The following actions can be selected:
DISR: Causes the controller to disregard temperature
WAIT.BR: Causes the controller to hold the process to allow the temperature time
to catch up. If the kiln couldn't catch up within the specified time (see next
parameter) the firing is interrupted (break). This hold sate (same as hold used
during programme run) can also be released manually by pressing the hold skip
button
WAIT.CO: Causes the controller to hold the firing but after the time has elapsed
continues the firing disregarding the temperature
INFI: Causes an immediate break if the temperature can not follow.
07: max hold (sec)
wait time in seconds for the feature specified previously
08: uncontr = ..LP
Selects the criteria the controller judges the kiln as "non following the temperature
increase":
ALL: all loops out of control (maximum or minimum heating)
ANY: any loop out of control
.
(value range 0 to 9999)
(options DISR, WAIT.BR,
WAIT.CO, INFI, INFI, INFI)
(value range 0 to 9999)
(options ALL, ANY)
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