Diagnostics; Behavior Of The I/O Module In The Event Of Error; Table 152: Priority Levels Of Diagnostic Functions - WAGO 750-489 Manual

WAGO-I/O-SYSTEM 750
750-489 4AI RTD/TC/Strain Gauge Ex i
10

Diagnostics

Disable unneeded inputs!
The I/O module (750-489) has very sensitive measurement inputs.
Disable the channel of unused inputs to avoid unwanted error messages.
Section "Configuration and Parameterization with WAGO-IO-CHECK" describes
how one channel, or the channel diagnostics of individual inputs, of the I/O
module can be switched on/off.
10.1

Behavior of the I/O Module in the Event of Error

The behavior of the I/O module if a diagnosis is present depends on the
configuration of
• the overflow monitoring,
• the underflow monitoring,
• the underrange/overrange monitoring,
• the limiting value violation monitoring.
You can activate or deactivate these diagnostics separately in WAGO-I/O-
CHECK (see Section "Commissioning" > ... > "Parameterization with WAGO-I/O-
CHECK").
The I/O module only ever 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. Some errors cause multiple error statuses to occur.
This is why error statuses are given priority levels.
In the event that several errors are present, the error with the highest priority will
always be indicated.
The following priority levels apply:

Table 152: Priority Levels of Diagnostic Functions

Priority Level
High
High
Medium
Medium
Low
Low
Diagnostic Function
Overflow
Underflow
Measurement underrange
Measurement overrange
Violation of lower user limiting value (user underrange)
Violation of upper user limiting value (user overrange)
Version 1.1.0, valid from FW Version 02
Diagnostics 151
Manual