Configuration of the CPU 410
3.1 Operator controls and indicators on the CPU 410
CPU 410 Process Automation/CPU 410 SMART
36 System Manual, 05/2017, A5E31622160-AC
The following table gives an overview of the available LED displays.
Sections CPU 410 monitoring functions (Page 39) and Status and error displays
(Page 41) describe the states and errors/faults indicated by these LEDs.
Table 3- 1 LED displays on the CPUs
INTF red Internal error
Loss of redundancy/Redundancy fault
Bus fault at the PROFIBUS interface
Bus fault at the first PROFINET IO interface
Bus fault at the second PROFINET IO interface
Error in synchronization module 1
Error in synchronization module 2
Maintenance request pending
Connection at the PROFINET IO interface is active
Receiving or sending data at the PROFINET IO interface.
Connection via synchronization module 1 is active and OK
LINK 2 OK green Connection via synchronization module 2 is active and OK
You operate the reset button in the following cases:
● You want to reset the CPU to the factory state, see section Resetting the CPU 410 to
delivery condition (reset to factory setting) (Page 142)
● You want to reset the CPU during operation, see section Reset during operation
(Page 143)
The reset button is on the front of the CPU directly below the LED strip. Press it with a
suitably thin round object.
Slot for synchronization modules
The synchronization modules for redundant operation are inserted in these slots. See
section Synchronization modules (Page 239).
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