Festo CPX Series Electronic Manual page 146

B. Parameters and data of the CPX terminal
Module parameters: Input debounce time
Function no. 4828 + m * 64 + 1
Description Determines when a change of edge in the sensor signal on this module is to be
accepted as a logical input signal.
Bit Bits 4, 5
Typical values Bit 5
0
0
1
1
Remark Input debounce times are specified in order to eliminate interfering changes of
signal edge during switching procedures (bouncing of the input signal). Further
information on this parameter can be found in section C.1.1.
Table B/13: Input debounce time
Module parameters: Signal extension time
Function no. 4828 + m * 64 + 1
Description Determines the signal extension time for the relevant input module. Signal states
accepted as logical input signals usually remain valid at least until the specified
minimum signal duration has expired. Change of edge within the extension time
are ignored.
Bit Bits 6, 7
Typical values Bit 7
0
0
1
1
Remark There is a danger here that the short signals are not always "recognized" due to
long cycle times of the higher-order controller. In order that such signals are
taken into consideration in the control sequence, a signal extension time can be
specified (see section C.1.2).
The signal extension time can be activated by channel-by-channel (see channel-
specific module parameters).
Table B/14: Signal extension time
B-16
m = Module number (0...47)
Bit 4
0 : 0.1 ms
1 : 3.0 ms (typical pre-setting)
0 : 10 ms
1 : 20 ms
m = Module number (0...47)
Bit 6
0 : 0.5 ms
1 : 15 ms (typical pre-setting)
0 : 50 ms
1 : 100 ms
Festo P.BE-CPX-SYS-EN en 0112NH