Festo SFC-DC series, Manual

Page: 119 / 202

5. Commissioning
5−35
Festo P.BE−SFC−DC−IO−EN en 0801a
Switch−on behaviour In order to guarantee that the system starts correctly, all
input signals must be stable when the voltage supply is
switched on (min. 1 s). After this the input signals are
scanned.
If there are no errors (ERROR signal = 1) and enable is active
(ENABLE signal = 1), then the SFC−DC reports readiness for
operation (READY signal
>
1). After that the reference run
(input word I1 ... I5 = 0, positive edge at input START) can
be started.
Other position sets (I1 ... I5
š
0) cannot be started
(error PLEASE ENFORCE HOMING RUN!").
Start reference run After the START signal is set (
>
1), confirmation via the ACK
signal (
>
0) takes place. The MC signal (Motion Complete)
is reset (
>
0), the drive executes the reference run.
After the START signal is reset (
>
0) comes confirmation via
the ACK signal (
>
1).
Once the reference run is complete, the MC signal is set
again (
>
1).
After that, any number of positioning procedures can be
executed, see Fig.5/4.
Stopping the
reference run An ongoing reference run, like any position set, can be
stopped with a negative edge at the input STOP (
>
0), see
Fig.5/3. The drive stops the motion with maximum brake
ramp. The MC signal (Motion Complete) is set (
>
1), the
READY signal is reset (
>
0).
Fault in the
reference run If an error occurs during the reference run, the drive is
stopped immediately; the MC signal, the READY signal and
the ERROR signal are reset (
>
0). The SFC−DC reports a
HOMING ERROR".