AMCI ANS1 ANYNET-I/O, User Manual

Page: 29 / 90

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Additional Functionality
3
29
Die Protection Monitors (continued)
Cyclic Check
This mode uses the Check Windows associated with the input. The input must be active for at least 500
microseconds while the position is within the programmed windows and inactive for at least 500 microsec-
onds while outside of the windows. Errors are detected on the rising and falling edges of the check windows.
Figure 3.2 shows how the Cyclic Check operates when the counter is set to continuously count.
Figure 3.2 D.P. Cyclic Check - Continuous Count Mode
a) No Fault. The input was low for at least 500 microseconds between falling edge of previous check win-
dow and leading edge of this check window.
b) No Fault. The input was high for at least 500 microseconds between leading and falling edges of this
check window.
c) A fault occurs because the input was not high between leading and falling edges of this check window.
d) The fault count does not increment because the input was low for at least 500 microseconds between the
falling edge of previous check window and the leading edge of this check window.
e) The fault count does not increment because the input was high for at least 500 microseconds between the
leading and falling edges of this check window.
f) A fault occurs because the input was not low for at least 500 microseconds between the falling edge of
previous check window and the leading edge of this check window.
One Machine
Cycle
Die
Protection
Window
Die
Protection
Input
Fault
Output
Fault
Counter
0
a
0
a
1
d
2
f
2
d
3
d
0
b
1
c
1
e
2
e
3
e