9
Display (12) shows continuously all values of the
current process such as actual kiln temperature,
heating power (in %), status of the control outputs etc.
All values are shown in sequence by pressing key (21).
The TC505 is available in a version for multizone
kilns. The indicator (1) points to the zone the value
refers to. For details about multizone kilns please
check out the „Technical Manual TC500 Series
Controller“ available on
http://www.bentrup.de.
The sequence of the process values can be determined
in the configuration. By default the values shown in
display (12) by pressing key (21) are as follows:
Actual Kiln Temperature
The actual temperature of the kiln is shown. On
multizone kilns the temperatures are shown zone by
zone pressing key (21). Zone no# refer to indicator (1).
„over“: no sensor (thermocouple) connected, sensor broken,
sensor wiring broken or adjusted sensor temperature exceeded
„under“: sensor or wiring polarized bad. On switching poles
check color codes ! A wiring switched at both ends (!) can NOT
be determined by the controller and will cause overfiring !
„invalid“: signal acquisition bad, error on determining cold
junction temperature or controllers data acquisition defect.
Actual kiln heating in percent
On kilns switching ON / OFF only the percentage is
represented by the on/off duty (e.g. 50% means 15
seconds on and 15 seconds off).
„channel off“: currently no control process, for instance during
programme delay or programme not started.
„channel over“: control channel has been switched off due to
error of corresponding signal input (e.g. „over“ on input).
Automatic reset when starting a programme.
„channel gradient error“: For safety reasons TC505 checks the
temperature increase of the kiln during full power heating. When
dropping below 3°C per 15min this error message appears. Typical
causes:
heating elements too old or broken, one phase of mains
supply missing or missing by contactor failure, short circuit of
thermocouple or wiring. Not a defect of the controller !
Z3
Z 1
Z2
Z3
Z 1
Z2
Z3
Z 1
Z2
Z3
Z 1
Z2
Z3
Z 1
Z2
Z3
Z 1
Z2
Z3
Z 1
Z2
Z3
Z 1
Z2
Displaying the
Kiln Temperature
