Diagnostics with the CP 340
8.1 Diagnosis via the Display Elements of the CP 340
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03
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8.1 Diagnosis via the Display Elements of the CP 340
Introduction
The display elements of the CP 340 provide information on the CP 340. The following
display functions are distinguished:
● Group error displays
– SF (red) An error has occurred, or new parameters were assigned
● Special displays
– TXD (green)Sending active; lights up when the CP 340 is sending user data via the
interface
– RXD (green)Receiving active; lights up when the CP 340 is receiving user data via the
interface
Group error LED SF
The group alarm LED SF always lights up after POWER ON and goes out after initialization.
If parameterization data has been generated for the CP 340, the SF LED again lights up
briefly during reparameterization.
The group alarm LED SF lights up whenever the following occur:
● Hardware faults
● Firmware errors
● Parameterization errors
● BREAKs (receive cable between CP 340 and communications partner becomes
disconnected). The BREAK display on the Group alarm LED SF only occurs if the
BREAK monitoring was not deactivated with the parameter assignment interface.
Note
In the event of a BREAK on the RXD line, the group alarm LED SF and the special
LED RXD light up.
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