68 Diagnostics
WAGO-I/O-SYSTEM 750
750-496 8AI 0/4-20mA S.E.
Manual
Version
1.2.2
8
Diagnostics
8.1
I/O Module Behavior in the Event of an Error
The response of the I/O module if a diagnostic is present depends on the
configuration for wire break monitoring, short circuit monitoring,
underrange/overrange monitoring and upper/lower limiting value monitoring. You
can activate or deactivate these diagnostics separately in WAGO-I/O-
CHECK
(see section “Startup” > … > “Parameterization with WAGO-I/O-
CHECK
”).
The I/O module only allows one error to be indicated. A dedicated bit in the status
byte is assigned to each error. The associated status bit is set if an error status is
detected. Certain errors cause multiple error statuses to occur. This is why error
statuses are given priority levels. In the event of several errors being present, the
error with the highest priority will always be displayed.
The following priority levels apply:
Table 36: Priority levels of diagnostic functions
Priority level
diagnosis function
High
Short circuit
High
Wire break
Medium
Under-range
Medium
Over-range
Low
Violation of user-defined lower limit (user under-range)
Low
Violation of user-defined upper limit (user over-range)
