WAGO-I/O-SYSTEM 750 XTR
Diagnostics 71
750-652/040-000 Serial Interface RS-232/RS-485 XTR
Manual
Version 1.3.0
9
Diagnostics
9.1
Serial Operating Modes RS-232, RS-422 and RS-485
Table 50: Diagnostics, Serial Operating Modes RS-232, RS-422 and RS-485
Diagnostics
Event
Solution
Input buffer full The I/O module receives
data via the serial interface
faster than accepted by the
application.
• Make sure that the application
always accepts data
immediately.
• Reduce data traffic.
• Use flow control.
• Reduce baud rate.
Output buffer
full
The I/O module receives
data faster from the
application than it sends via
the serial interface.
• Check “Continuous Send”.
• Reduce data traffic.
• Increase baud rate.
• Make sure that the opposite
side accepts data.
Parity error
Data transmission was
interrupted.
• Check the configuration of the
interface parameters.
• Use a shielded cable.
• Change wire routing.
• Shorten cable.
• Eliminate interference.
Overflow
Data loss has occurred.
• Reduce baud rate.
9.2
DMX Operating Mode
Table 51: Diagnostics, DMX Operating Mode
Diagnostics
Event
Solution
Transmission
failure when
receiving
More than 1.2 s has passed
since receipt of a valid
packet.
• Check wire routing.
• Check cable type.
• Check DMX sender operation.
Packet ID
The start code of the
received DMX packet is
not 0.
• Check wire routing.
• Check cable type.
• Check the start code of the
DMX sender.
• Increase the number of
transmitting DMX channels
(min. 27 channels).
