Diagnostics with the CP 440
8.2 Diagnostics via the display elements of the CP 440
Point-to-point connection CP 440 Installation and Parameter Assignment
116 Manual, 09/2007, A5E00057742-03
8.2 Diagnostics via the display elements of the CP 440
The display elements of the CP 440 provide information on the CP 440. The following
display functions can be distinguished:
● Group error displays
– INTF internal error
– EXTF external error
● Special displays
– TXD (green) sending active; lights up when the CP 440 is sending user data via the
interface
– RXD (green) receiving active; lights up when the CP 440 is receiving user data via the
interface
● Interface fault LED
– FAULT interface error
Error Messages of the Display Elements
The table below describes the error messages of the display elements.
Table 8-1 Error Messages of the CP 440 Display Elements
Error display Error Description To correct or avoid errors
INTF comes on CP 440 signals internal fault, e.g. protocol fault Read the STATUS of the FB, or read the
diagnostic buffer of the CP 440.
EXTF comes on CP 440 signals external fault, e.g. break on the
line.
Read the STATUS of the FB, or read the
diagnostic buffer of the CP 440.
FAULT off Interface ready for operation -
FAULT flashing
slowly
Interface initialized and ready for operation but
communication via S7-400 backplane bus not
possible.
Check the configuration for incorrect entries
(e.g. slot, ID no., etc.).
FAULT flashing fast Incorrect parameter Check the parameter settings in the CP441:
Point–to–Point Connection Parameter
Assignment interface.
FAULT comes on No interface parameters Assign parameters with the CP440: Point–to–
Point Connection Parameter Assignment
interface.
INTF and FAULT light
up at the same time
CPU reset (module not configured / has not
been assigned parameters)
Configure and assign parameters to the CP440
and load the HW configuration to the CPU
See also
Subsequent Loading of Firmware Updates (Page 82)
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