KROHNE ALTOSONIC V EN - Manual (Page 41)

ALTOSONIC V
Operating Manual rev02 E 7.30850.34.00 Page 41 of 106
4.9.1 Service menu: F2 Interrupts window
Under normal circumstances it is not necessary to view this window.
The Interrupt window is the lowest level PC activity monitor.
The serviced interrupts are counted per source. Therefore, the activity on for example a COM port for
Modbus can easily be monitored for any signals coming in.
The settings for the communication can be found in parameter file COMS0300.dat
Default settings for the COM ports are:
Irq 3: COM 4, Modbus for RS422/RS485.
Irq 4: COM 3, RS 485 UFC DATA communication.
If the Modbus communication is set up on the RS485 card there must be activity on COM 4. (Or
Modbus communication on a RS232 port then use port 2).
If there is no activity then check the configuration in the COMS0300.dat and check the connections and
wiring.