AO2000 CONTINUOUS GAS ANALYZERS  |  OI/AO2000-EN REV. B  197
 
 
 
Configuring Bus I/Os 
Menu path 
MENU → Configure → System → Network → BUS IO 
 
Number of Bus I/Os 
Changing the number of Bus I/Os will affect the Modbus address range, 
Profibus map and Ethernet linking. 
Reducing the number of Bus I/Os may cause transmission errors if the set-
tings in the communication partners are not matched. This may also cause 
damage in the function block applications. 
Parameters 
Parameter Function Read Write Example 
BUS AI 
Bus analog 
inputs 
x  x  for analog value input into the function block 
application 
BUS AO 
Bus analog 
outputs 
x  –  for analog value output from the function 
block application 
BUS DI 
Bus digital 
inputs 
x  x  for control of functions such as auto calibra-
tion, measurement range control after func-
tion block configuration 
BUS DO 
Bus digital 
outputs 
x  –  for display of functions linked by function 
block configuration, e.g. alarm signaling