COSA Xentaur Xentaur XDTL-HT - Manual (Page 36)

36
Symptoms Solutions
Ethernet communication not
working Make sure that each XTDL-HT™ instrument has a unique MAC
address and IP address on your network. If your installation
has more than one XTDL-HT™ instrument, give each
instrument a unique MAC address. Contact your network
administrator for an unused IP address for this instrument and
the gateway address. Recycle power to the instrument to apply
the new address settings.
The instrument supports only one Modbus/TCP channel. Make
sure that the channel is not being used.
RS-485 serial communication not
working XTDL-HT™ uses half-duplex RS-485 interface. The inverting
data line must be connected to terminal block 11, and the non-
inverting data line to terminal block 12. If unsure, try swapping
the two lines.
XTDL-HT™ uses address 2 by default for Modbus RTU
communication. Make sure that no other device on your
Modbus network is using this address.
Make sure that the baud rate, stop bits, and parity settings on
instrument match the DCS.
Modbus communication comes
and goes Modbus is a master/slave protocol. Make sure that sufficient
time is given to wait for response to each command. If the
instrument is not responding to a command, wait 2 seconds
before issuing another command. For tighter timing, change
Timeout value on instrument.
Screen is flashing Error 2 Check connections on the WMS power cable and the WMS
serial cable. Inspect cable connectors for any sign of damage.
Once problem is corrected, it will take about 5 seconds for the
error to clear.
Ball on flow meter bouncing wildly Not enough flow to the sampling system. Increase flow rate.
If problem is not resolved with the solutions above, please contact COSA Xentaur for services.