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2.3
Configuring Keys/LEDs
OEM Push Button Panel Equipment Manual
Release 08/98
The switches and keys need only be configured when a configuration deviating
from the predefined system settings is required.
The following parameters can be adjusted for the Push Button Panel:
Parameter
Pulse exten-
The signal pulse regarding all operations initiated by pressing
sion
buttons on the PLC is extended in order to ensure reliable
switch/key polling by the PLC even when pressed very
briefly.
The extension of the signal pulse results from:
Pulse = Entered value x 20 ms
Value range: 0 to 50
System default setting: No pulse extension
Lamp/Key
A key on the keyboard is assigned for activating the Lamp
test
test. The parameter indicates the number of the key which is
assigned the Lamp test function. The keys are numbered
from right to left, in rows, beginning at the top right moving
down. The value 0 deactivates the Lamp test.
Value range: 0 to total number of keys
System default setting: Lamp test assigned to Key 1 (top
right)
Function
It is possible to define whether a key on the keyboard should
keys
function as a key or switch.
Function momentary–contact switch:
Function switch:
The way in which each key functions is defined by a single
bit. The keys are numbered from right to left, in rows, begin-
ning at the top right moving down, so that the first bit in the
configuration is designated for the key at the top right and the
last bit for the key at the bottom left.
Bit = 0:
Bit = 1:
System default setting: All the keys are configured as keys.
Starting Up the Push Button Panel
Description
The corresponding bit in the PLC is
set as long as the key is pressed.
Pressing the key sets the correspond-
ing bit, pressing again resets it.
Function momentary–contact switch
Function switch
2-9
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