Festo SFC-DC series, Manual

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5. Commissioning
5−33
Festo P.BE−SFC−DC−IO−EN en 0801a
ACK: O3 Acknowledge
The ACK signal confirms receipt of the START signal.
This can be used, forexample, to implement handshake func
tions with the higher−level SPC/IPC (see also section 5.6.2).
Output Status ACK (output)
O3 1
>
0 START signal accepted.
0
>
1 START input reset
The output ACK is affected by the state of the input START.
When there is a positive edge at the input START during the
execution of a position set (MC signal = 0), the output ACK
remains set.
ERROR: O4 Fault
A 0−signal at output ERROR indicates that the SFC−DC is
reporting a fault (see section 6.3).
A 1−signal at output ERROR indicates that the SFC−DC is not
reporting any fault.
Output Status ERROR (output)
O4 0−signal Fault
1−signal No error