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