WAGO-I/O-SYSTEM 750
Diagnostics 69
750-496 8AI 0/4-20mA S.E.
Manual
Version
1.2.2
Table 37: Behavior in the Event of an I/O Module Error Dependent on the Configuration
Configuration
I/O module behavior for
wire break/short circuit
I/O module behavior for
range violation
Wire
break/short
circuit
monitoring
Underrange/overr
ange monitoring
OFF
OFF
Process value is saturated,
no change in statues byte,
error LED off
Process value is saturated,
no change in statues byte,
error LED off
OFF
ON
Process value is saturated,
no change in statues byte,
error LED on
Process value is saturated,
error bit (bit 0: Underrange or
bit 1: Overrange) is set,
general error (bit 6: General
Error) is set,
error LED ON
ON
OFF
Process value is saturated,
error bit (bit 5: Wire Break or
bit 6: Short Circuit) is set,
general error (bit 6: General
Error) is set,
error LED ON
Process value is saturated,
no change in statues byte,
error LED off
ON
ON
Process value is saturated,
error bit (bit 5: Wire Break or
bit 6: Short Circuit) is set,
general error (bit 6: General
Error) is set,
error LED ON
Process value is saturated,
error bit (bit 0: Underrange or
bit 1: Overrange) is set,
general error (bit 6: General
Error) is set,
error LED ON
The limiting values for detecting an underrange / overrange, a wire break, short
circuit or a limiting value underrange / overrange and the output process values
are specified in the process image tables (see section “Process Image”).
A general error signals a diagnosed error status. A general error is displayed if
one or more of the error statuses named in this section occur or other internal
error statuses for the I/O module are present. If there are any of the diagnostics
for range violation, short circuit or wire break, the bit for general error is always
set.
Note how long diagnostics are displayed!
A diagnosed error status is displayed at least 100 ms even if the detected error
status is no longer present in this period. If a higher-priority error status occurs in
this period, the higher-priority error status is displayed for 100 ms and the lower-
priority error status is lost.