AMCI ANS1 ANYNET-I/O, Руководство пользователя

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Additional Functionality
ADVANCED MICRO CONTROLS INC.
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Die Protection Monitors (continued)
Cyclic Check (continued)
Figure 3.3 shows how the Cyclic Check operates when the counter is set to self-reset.
Figure 3.3 D.P. Cyclic Check - Self-Resetting Count Mode
a) No Fault. 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.
b) No Fault. The input was high for at least 500 microseconds between the leading and falling edges of this
check window.
c) A fault occurs because the input was not high between the leading and falling edges of this check window.
The counter is incremented.
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 leading edge of this check window.
e) The fault counter clears and the fault output energizes because a fault did not occur between the falling
edges of consecutive check windows.
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. The counter is incremented.
g) 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.
h) The fault counter increments because the input was not high for at least 500 microseconds between the
leading and falling edges of this check window.
One Machine
Cycle
Die
Protection
Window
Die
Protection
Input
Fault
Output
Fault
Counter
0
a
0
a
1
d
1
f
1
d
2
d
0
b
1
c
0
e
1
g
2
h
0
e