Table 154: Behavior Of The I/O Module In The Event Of Range Violation - WAGO 750-489 Manual

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

Table 154: Behavior of the I/O Module in the Event of Range Violation

Overflow/
Underflow
Monitoring
Off
Off
On
On
*) 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.
Underrange/
Overrange
Monitoring
*) *)
Off
On
Off
On
Behavior of the I/O Module in the Event
of Range Violation
• 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
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 measured value is output as a
•
process value outside the specified
range
• No change to the status byte
Error LED does not light up
•
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
•
Version 1.1.0, valid from FW Version 02
Diagnostics 153
Manual