Influence Of Signal States - Festo CPX Electronic Manual

C. General information on parametrizing
C.3

Influence of signal states

Function Priority Brief description
2)
Forces 1
Fail safe 2
Idle mode 3
1)
1)
Only relevant for certain field bus protocols.
2)
Mainly used for test purposes in the commissioning phase.
Tab. C/1: Functions for influencing signal states
Festo P.BE−CPX−SYS−EN en 0503b
You can influence the signal states of the CPX terminal
through the following functions:
Influences signal states independently of actual signal
states (see also section C.3.1).
Determines signal states that become effective with
field bus communication faults (see also section C.3.2).
Determines signal states that become effective when
changing into the Idle status (see also section C.3.3).
If several functions are active simultaneously, the following
applies:
Force signals have the highest priority.
Fail safe signals have precedence over Idle mode signals.
Overview on the Force, Fail safe and Idle mode
functions
Influencing output signals
With system parameters, you enter the fundamental settings
for the respective function. With appropriate setting of the
system parameter, you can determine, through channel−spe
cific module parameters, the desired signal state for each
channel individually. The following diagrams give an overview
of this:
Signals able to
be influenced
I/O signals
O signals
O signals
C−9