WAGO-I/O-SYSTEM 750
Diagnostics 153
750-489 4AI RTD/TC/Strain Gauge Ex i
Manual
Version 1.1.0, valid from FW Version 02
Table 154: Behavior of the I/O Module in the Event of Range Violation
Overflow/
Underflow
Monitoring
*)
Underrange/
Overrange
Monitoring
*)
Behavior of the I/O Module in the Event
of Range Violation
Off
Off
•
The measured value is output as a
process value outside the specified
range
•
No change to the status byte
•
Error LED does not light up
Off
On
•
The measured value is output as a
process value outside the specified
range
•
Error bit is set
(bit 0: underrange or
bit 1: overrange)
•
General error is set
(bit 6: general error)
•
Error LED lights up
On
Off
•
The measured value is output as a
process value outside the specified
range
•
No change to the status byte
•
Error LED does not light up
On
On
•
The measured value is output as a
process value outside the specified
range
•
Error bit is set
(bit 0: underrange or
bit 1: overrange)
•
General error is set
(bit 6: general error)
•
Error LED lights up
*)
The different types of monitoring must be enabled/disabled separately.
The limiting values for detecting a measurement underrange/overrange or an
overflow/underflow, as well as the process values that are output, are specified in
the process value tables (see Section “Process Image”).
A “General Error” signals a diagnosed error status. A general error is displayed if
one of the named error states occurs. If any of the diagnostics for range violation,
overflow or underflow is present, the bit for “General Error” is always set as well.
If the bit for “General Error” is set individually (even without the presence of a
diagnosis of range violation, overflow or underflow), this indicates an internal
error state of the I/O module.
