Analog electronic modules
15.8 Overview of parameters of the analog electronic modules
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
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Diagnostics of short-circuit (inputs)
If this parameter is enabled, the system generates short-circuit diagnostic data when a short-
circuit between signal lines is detected.
Diagnostics of short-circuit (outputs)
If this parameter is enabled, the system generates diagnostic data when a short-circuit
between the output line and P potential or ground is detected.
Wire break diagnostics
If this parameter is enabled, the system generates wire break diagnostic data when a wire
break is detected.
Analog input modules: Observe the rules outlined below in case of a wire break in the 1 V to
5 V and 4 mA to 20 mA measuring ranges:
Parameters
Event
Measured
value
Explanation
Wire break diagnostics
enabled
1
Wire break
7FFF
H
Wire break diagnostics
Wire break diagnostics
disabled
1
Overflow/underflow
enabled
Wire break
8000
H
Measured value after leaving the
undershoot range
Diagnostics message Value below high
limit/low limit
Wire break diagnostics
disabled
1
Overflow/underflow
disabled
Wire break
8000
H
Measured value after leaving the
undershoot range
1
Measured value limits for wire break and measuring range undershoot detection:
•
1 V to 5 V: At 0.296 V
•
4 mA to 20 mA At 1.185 mA
Overflow/underflow diagnostics
If this parameter is enabled,
●
the overflow diagnostics is generated when the measured value reaches the overflow
range.
●
the underflow diagnostics is generated when the measured value reaches the underflow
range.
