Commissioning
42
Fault mode
Failsafe mode if an
input signal/variable is invalid
(e.g. cable open circuit, invalid result of mathematics calculation; e.g. dividing by zero).
Set failsafe
mode
"Invalid" channel Dependent channels
Value is Invalid • "– – – – –" or "******" are
displayed
• Channel name is highlighted in red
• Status "F" is displayed
• Limit value monitoring is suspended
• Totalization is suspended
• A relay is switched if set.
• Analysis: if the error is pending during the entire analysis
period, the value in the analysis is invalid. If there was at least
1 valid value, the result of the analysis is valid.
• "– – – – –" or "******" are
displayed
• Channel name is highlighted in red
• Status "F" is displayed
• Limit value monitoring/totalization:
depends on the set failsafe mode of this channel
• A relay is switched if set.
• Analysis: if the error is pending during the entire analysis
period, the value in the analysis is invalid. If there was at least
1 valid value, the result of the analysis is valid.
All other settings • "– – – – –" or "******" are
displayed
• Channel name is highlighted in red
• Status "F" is displayed
• Value is totalized
• A relay is switched if set.
• Analysis: if the error is pending during the entire analysis
period, the value in the analysis is invalid. If there was at least
1 valid value, the result of the analysis is valid.
• Calculated value is displayed
• Channel name is highlighted in red
• Status "F" is displayed
The channel is treated as "valid", i.e.:
• Value is totalized
• Limit value monitoring remains active
• If the result of the calculation for this channel is invalid, the set
failsafe mode for this channel applies
• Analyses: the channel is analyzed as normal
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