Diagnostics Via The Display Elements Of The Cp 440 - Siemens SIMATIC S7-400 Equipment Manual

Diagnostics with the CP 440

8.2 Diagnostics via the display elements of the CP 440

8.2 Diagnostics via the display elements of the CP 440
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
– RXD (green) receiving active; lights up when the CP 440 is receiving user data via the
• 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
INTF comes on CP 440 signals internal fault, e.g. protocol fault
EXTF comes on CP 440 signals external fault, e.g. break on the
line.
FAULT off Interface ready for operation
FAULT flashing slowly Interface initialized and ready for operation but
communication via S7-400 backplane bus not
possible.
FAULT flashing fast Incorrect parameter
FAULT comes on No interface parameters
INTF and FAULT light CPU reset (module not configured/has not been
up at the same time assigned parameters)
See also
Subsequent Loading of Firmware Updates (Page 69)
96
interface
interface
To correct or avoid errors
Read the STATUS of the FB, or read the diagnostic
buffer of the CP 440.
Read the STATUS of the FB, or read the diagnostic
buffer of the CP 440.
-
Check the configuration for incorrect entries (e.g.
slot, ID no., etc.).
Check the parameter settings in the CP440:
Point–to–Point Connection Parameter Assign‐
ment interface.
Assign parameters with the CP440: Point–to–
Point Connection Parameter Assignment inter‐
face.
Configure and assign parameters to the CP 440
and load the HW configuration to the CPU.
Point-to-point connection CP 440 Installation and Parameter Assignment
Equipment Manual, 03/2022, A5E00057742-AE