3. The I/O module
3-27
Festo P.BE-CB-COMP-EN en 1102d
3.6.6 Buffer zone sensors/small parts conveyor
Note
This chapter contains supplementary information on con-
trolling the small parts conveyor and the buffer zone
sensors via the PL C interface. Note also the instructions
and information in Chapter 3.3.
Internal circuitry The I/O signals for buffer zone sensors and the small parts
conveyor at the PLC connection are connected internally with
the BUFFER/F EEDER connection.
BUFFER
FEEDER
PLC
Function
O/1 O/21
– 24 V reference voltage for buf-
fer zone sensors
– Ready status
– Controlling the conveyor device
O/2 O/8 24 V power output for controlling
a small parts conveyor (feeder)
O/3 O/4
0 V reference voltage
buffer zone sensors
I/4
I/12
Bufferzonesensor1
Tab. 3/17: Internal circuitry BUFFER/FEEDER-PLC
Switch-on delay of the small parts conveyor
After starting, the Checkbox triggers the actuator for sorting
out the bad parts. This is to ensure that no (unchecked) par ts
are left on the conveyor device. This results in a delay of a
few seconds between the external Start command (I/6) and
the switch-o n signal for the small parts conveyor (O/8). The
duration of this delay depends on ambient parameters,
e.g. transporting speed and geometrical variables.
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