Siemens UL 1066 Operating Instructions Manual page 165

Terminal assignment
Terminal assignment of digital input module
X4 Inputs 4-6
X5 Inputs 1-3
Settings
 Setting principle (page 9-81)
Settings of digital input module
BUS Inputs 1-6 are active.
INPUT
If there is an input signal present, a corresponding message is transmitted 
to the
PARAMETER SWITCH Input 1 is used for parameter switchover. All other inputs have no function.
No input signal (LED 1 not lights up):
Parameter set A activated
Input signal available (LED 1 lights up):
Parameter set B activated
NOTE
The parameter switchover query can be overruled by a query via the BUS communication, the BDA or the graphical display.
Indicators
 (page 9-81)
Testing
 (page 9-81)
BUS
via the COM15/16 module.
BUS
Input
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