Festo Controller CECC
39
1
Compare value
3
Signal curve at the digital output
2
Hysteresis
Figure: Digital output as a function of the "Hysteresis" parameter
Latch settings
A buffer memory (latch) can be used to record the position value of the encoder when an external signal
(latch result) occurs. This buffer memory can be read out during the next PLC cycle.
The external signal is connected to the latch input. On the CECC-S, this is the fourth input on the I/O
interface (X2.3).
Parameter Setting Comment
Latch
function
– Latch function switched off Defines the condition relating to whether and
when the current encoder value is written to
the buffer memory.
– Latch by rising edge
– Latch by rising and falling edge
Latch input
polarity
– Not inverted
– Inverted
Polarity setting for the latch input.
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