Filtec FT-50c Service And Technical Reference Manual page 203

FT-50 Fill Level Inspector Service Manual
Note
8-12
Error Number 119
This error indicates a host or Modbus serial parity error occurred.
To correct this error, check the parity setting which is controlled by
dip switches S2-3 and S2-4:
• S2-3 closed = no parity
• S2-4 closed = odd
• S2-4 open = even
Error Number 120
This error indicates there is a RX Receive Rate error. Too many
characters have been received in one second. This error may be
caused by line noise.
To correct this error:
• Check the termination of the RX input.
• Check the RX input with a voltmeter while the line is in a
steady state (no transmission):
RS-485: RX(-A) = GND
RX(+B) = +5VDC
RS-232: RX(-A) = -12VDC to -4VDC
RX(+B) = GND
Error Number 121
This error indicates the CTS line (Clear To Send) is changing too
rapidly for normal communication and therefore appears busy.
This error is usually caused by excessive noise.
• Check the termination of the CTS input.
• Check the CTS input with a voltmeter while the line is in a
steady state (no transmission):
CTS(-A) = GND
CTS(+B) =+5VDC
For a quick solution you can connect TB1-5 and TB1-6 together.
Industrial Dynamics Company, Ltd. Document 40255-0600