Diagnostics; I/O Module Behavior In The Event Of An Error; Table 44: Priority Levels Of Diagnostic Functions - WAGO 750-486 Manual

WAGO-I/O-SYSTEM 750
750-486 4AI 0/4-20 mA, Ex i
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 44: Priority Levels of Diagnostic Functions

Priority level
High
High
Medium
Medium
Low
Low
Diagnostics function
Short circuit
Wire break
Underrange
Overrange
Violation of user-defined lower limit (user underrange)
Violation of user-defined upper limit (user overrange)
Diagnostics 77
Manual
Version 1.1.2