WAGO 750-489 User Manual

154 Diagnostics WAGO-I/O-SYSTEM 750
750-489 4AI RTD/TC/Strain Gauge Ex i
Manual
Version 1.1.0, valid from FW Version 02
Note how long diagnostics are indicated!
A diagnosed error status is indicated for at least 200 ms even if the detected
error status is no longer present in this period. If a higher-priority error status
occurs in this period, the higher-priority error status is displayed for 200 ms, and
the lower-priority error status is lost!
10.2 Diagnostics via LED Indicators
The indicators of the I/O module provide information about possible states and
cases of error. The tables below contain the interpretations of the signals.
Table 155: Signal Evaluation for Each Channel – Status LED
Status LED State
Possible Interpretation
Off
Not ready for operation
Local bus communication absent or interrupted
Channel deactivated
Green
Operational readiness and uninterrupted local bus
communication
Table 156: Signal Evaluation for Each Channel – Error LED
Error LED State
Possible Interpretation
Off
No error
Channel deactivated
Diagnostics deactivated
Red
Underflow
Overflow
Measurement underrange
Measurement overrange
Internal error

WAGO 750-489 Specifications

General

Brand	WAGO
Model	750-489
Category	Control Unit
Language	English