6.8.2 Min/Max Control
When two sensors are used for track control, the feeder is switched off when material builds up beyond the
“max“ sensor and the time delay has elapsed (t5). The feeder switches on again when the product level
drops below the “min“ sensor and the corresponding time delay has elapsed (t2). The adjustable time delays
determine, precisely, the quantity of components that can go beyond the sensor positions. The time delays
are reset if gaps in the product flow are detected. The delay is always timed, precisely, from detection of the
first or last component. The on/off time delays are set by using trimmers or a programming menu in display
panel.
6.8.3 Sensor Time-out
Additional function available in digital controllers when the sensor switches (t1) an additional timer
”Sensor-
Time-out“
is started. After a preset time (e.g. 30...240 sec.) the feeder is switched off (t3), providing that in
the meantime no further product has been detected by the sensor. The status signal is initiated,
simultaneously, and a flashing error message, ”Error“ ”SE“, is displayed. This function is optional and must
be selected in the track control menu, where ”E.E.“ = I is to activate.
See the track control time diagram
10
ton
toff
Sensor 2 (Min)
t2
t5
t6 / t4
Sensor 1 (Max)
t1
Feeder ON
Feeder OFF
t on
off
Sensor 2
MIN
Output
Status
Time out
Output
Time out
Sensor 1
MAX
t2
t1
t3
t4
t5
t6
