Siemens ET 200pro - Page 429

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
429
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.