IGS-NT Combi, SW Version 3.0,   ©ComAp – May 2013                    
IGS-NT-Combi-3.0 Reference Guide.PDF 
 
User MODBUS 
Users can define Modbus registers from 42873 to 43000. Values, setpoints and Alarm states can be 
specified for these new Modbus registers to prepare the Modbus protocol for batch reading and writing or to 
standardize Modbus protocol between FW versions or branches. 
User Modbus register number
Standard Modbus register number
Communication object number
Value, Setpoint, Alarm state
Select type
Select object
 
NOTE:    
User MODBUS function is not available for IM-NT-GC controller. 
Analog Input Sensors and User Sensors 
Controller and/or some extension modules  allow connection of sensor outputs to Analog  Inputs.  There is 
whole variety of common sensor output characteristics prepared in configuration by default. Although if there 
is  sensor  that  is  not  in  the  list,  it  is  possible  to  prepare  custom  characteristics  (up  to  16)  with  up  to  31 
definition points. 
Name of the 
Analog Input
Dimension
Connected Sensor
(default and user 
sensors)
Resolution and Range of the sensor (in 
some cases this is fixed by sensor type 
and cannot be changed)
Interpretation of 
the received value 
in bar graph form
Offset of the 
received value
 
Figure: Sensor adjustment in GenConfig 
Default sensors: PT100/°C, PT1000/°C, NI1000/°C, PT100/°F, PT1000/°F, NI1000/°F,     
      4-20mA active, 0-2400ohm, 0-2.4V, Tristate