Siemens SIMATIC OEM PP32, Руководство по эксплуатации оборудования

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2-10
OEM Push Button Panel Equipment Manual
Release 08/98
Description Parameter
Function of
digital inputs Analog to the functionality of the keys on the keyboard, the
functioning of the digital inputs is defined here. The digital
inputs on the rear side of the Push Button Panel are counted
from top to bottom. Here, too, the way each input functions is
defined by a single bit.
System default setting: All digital inputs are configured as
momentary–contact switch.
LED mode Two control bits are reserved in successive bytes for config-
uring the mode of an LED. The diagram below clarifies the
position of the control bits in a memory byte or data block.
Byte n
Byte n+1
}
Control bits for
LED 1
Bit 7 Bit 0
Two successive configuration bits in one configuring data
block define the way in which the status of the control bits
are displayed. The following table illustrates the effects of
the various combinations of configuration bits on the LED
display:
Configuration bits Control bits LED
xx
xx
xx
00
01
10
11
00
01
10
11
11
11
11
off
lights green
lights red
flashes green
lights orange
flashes red
flashes orange
System default setting: Configuration bits = 00
Function of
digital
outputs The following table describes the effects of various combina-
tions of control bits on the behaviour of the digital outputs:
Control bits Behaviour of digital outputs
00
01
10
11
No signal
Continuous signal
Signal in clock pulse 2 Hz
Signal in clock pulse 0.5 Hz
Starting Up the Push Button Panel