Structure of the CPU 410-5H
3.3 Status and error displays
CPU 410-5H Process Automation
42
System Manual, 09/2014, A5E31622160-AB
INTF and EXTF LEDs
The two INTF and EXTF LEDs provide information about errors and other particular things
that happen during user program execution.
LED
Meaning
INTF
EXTF
Lit
Irrelevant
An internal error was detected (programming, parameter assignment, or license
error).
Irrelevant
Lit
An external error was detected (i.e., an error whose cause is not in the CPU
module).
BUS1F, BUS5F, and BUS8F LEDs
The BUS1F, BUS5F and BUS8F LEDs indicate errors associated with the PROFIBUS DP
interface and the PROFINET IO interfaces.
Table 3- 2
Possible states of the BUS1F, BUS5F, and BUS8F LEDs
LED
Meaning
BUS1F
BUS5F
BUS8F
Lit
Irrelevant Irrelevant An error was detected at the PROFIBUS DP interface.
Irrelevant Lit
Irrelevant An error was detected at the first PROFINET IO interface.
A PROFINET IO system is configured but not connected.
Irrelevant Irrelevant Lit
An error was detected at the second PROFINET IO interface.
A PROFINET IO system is configured but not connected.
Irrelevant Flashes
Irrelevant One or several devices at the first PROFINET IO interface are not responding.
Irrelevant Irrelevant Flashes
One or several devices at the second PROFINET IO interface are not responding.
Flashes
Irrelevant Irrelevant One of more slaves on the PROFIBUS DP interface are not responding.
IFM1F and IFM2F LEDs
The IFM1F and IFM2F LEDs indicate errors on the first or second synchronization module.
LED
Meaning
IFM1F
IFM2F
Lit
Irrelevant
An error was detected on synchronization module 1.
Irrelevant
Lit
An error was detected on synchronization module 2