JUMO LOGOSCREEN cf, Interface Description

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6 Error handling
6.1 Response after a power failure
After the supply voltage has been restored and the subsequent initialization
phase completed, all network-variables are reset to the correct values. The in-
put and output counters continue to operate with the values present at the
time of the power interruption.
6.2 Response on failure of mTRON module
When the recorder recognizes the failure of an mTRON module (within a maxi-
mum of 20 seconds after the failure) which provides values for its input net-
work-variables, it triggers the “Error” event. Measurements are designated
“no measurement” (display “-------”), counters are assigned the value 0 and
logic inputs the value FALSE. In addition, the info symbol flashes and in the
menu Device info
➔
Error the message “Ext. input” appears.
Within a maximum of 10 seconds after rectifying the error, the alarm should
cease to be present within the recorder and the exchange of data should func-
tion again.
H
mTRON modules which have failed can only be recognized if there
is at least one network-variable binding between them and the re-
corder.