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WAGO-I/O-SYSTEM 750
Diagnostics 95
750-450 4 AI RTD
Manual
Version 1.2.0
Temperature Measurement: Restriction for short-circuit detection!
With 3- and 4-wire connection technology, short-circuit detection is not possible
between the +R and +RL connections.
With 4-wire connection technology, short-circuit detection is not possible between
the −R and +RL connections.
Potentiometer: Restriction for short-circuit detection!
With the “Potentiometer” setting, short-circuit detection is not possible between
the +R and +RL connections.
Measuring resistance between the −R and +RL connections is only possible to a
limited extent. Short-circuit indication depends on the slider position of the
connected potentiometer
.
Table 73: Behavior in the Event of an Error Dependent on the Configuration
Configuration Options
Behavior for
range violation
Behavior for
wire break /
short circuit
Wire break /
short circuit
monitoring
Underrange /
overrange
monitoring
OFF
OFF
Process value is saturated,
no change in statues byte,
error LED off
Process value is saturated,
no change in statues byte,
error LED off
OFF
On
Process value is saturated,
Error bit (bit 0: Under-range
or bit 1: Over-range) is set,
General error (Err_G) (bit 6)
is set,
Error LED lit
Process value is saturated,
Error bit (bit 0: Under-range
on short circuit or bit 1:
Over-range for wire break)
will be set,
General error (Err_G) (bit 6)
is set,
Error LED lit
On
OFF
Process value is saturated,
no change in statues byte,
error LED on
Process value is saturated,
Error bit (bit 4 for short
circuit or bit 5 for wire break)
will be set,
General error (Err_G) (bit 6)
is set,
Error LED lit
On
On
Process value is saturated,
Error bit (bit 0: Under-range
or bit 1: Over-range) is set,
general error
(Err_G) (bit 6) is set,
Error LED lit
Process value is saturated,
Error bits (bit 4 for short
circuit or bit 5 for wire break)
will be set,
General error (Err_G) (bit 6)
is set,
Error LED lit