1-5
PP7,
PP17-I, PP17-II Equipment Manual
Release 06/98
The
following pulse diagrams elucidate the relationship between the actions
initiated on the Push Button Panel and changing bit status in the PLC:
Key
Contact
Release
input
pressed
open
not pressed
closed
Time
Function
as momentary–contact switch
Bit
in
PLC
1
0
Key
Function as switch
Bit
in
PLC
Contact
Release
input
Time
pressed
1
open
not pressed
0
closed
The
Lamp/Key test serves to test the functional capabilitity of all the keys and
lamps on the Push Button Panel. The Lamp/Key test can be activated by the
following measures in normal operation:
By pressing the key assigned to the Lamp/Key test function by the
corresponding parameter
.
By setting the two LED bits of the key assigned to the Lamp/Key test
function according to the configuration. The bits must be set in the PLC
using a relevant program.
The Lamp/Key test function is assigned to Key 1 (top right) in the pre-adjusted
system settings.
Pulse
diagrams
Lamp/Key test
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