72 Diagnostics
WAGO-I/O-SYSTEM 750 XTR
750-652/040-000 Serial Interface RS-232/RS-485 XTR
Manual
Version 1.3.0
9.3
Data Exchange Operating Mode
Table 52: Diagnostics, Data Exchange
Diagnostics
Event
Solution
Wrong length
The I/O modules have
different process image
sizes
• Configure the same process
image size
Checksum error Data transmission was
interrupted. The last valid
value is retained in the
process image.
• Use a shielded cable
• Change wire routing
• Shorten cable
• Eliminate interference
Timeout
The data transmission is
interrupted or has been
interrupted for a longer
period of time (see
checksum error).
The process image (input)
has been overwritten with
the value 0.
• Check cable and clamping
points for uniformity
• Check the configuration of the
I/O modules
• for checksum error: See
Diagnostics “Checksum error”