Structure of the CPU 410-5H
3.1 Operator controls and display elements on the CPU 410-5H
CPU 410-5H Process Automation
36
System Manual, 09/2014, A5E31622160-AB
LED displays
The following table shows an overview of the LED displays on the individual CPUs.
Sections Monitoring functions of the CPU 410-5H (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
LED
Color
Meaning
Top bar
INTF
red
Internal error
EXTF
red
External error
REDF
red
Loss of redundancy/Redundancy fault
BUS1F
red
Bus fault at the PROFIBUS interface
BUS5F
red
Bus fault at the first PROFINET IO interface
BUS8F
red
Bus fault at the second PROFINET IO interface
IFM1F
red
Error in synchronization module 1
IFM2F
red
Error in synchronization module 2
MAINT
yellow Maintenance request pending
RUN
green RUN mode
STOP
yellow STOP mode
Bottom bar
MSTR
yellow CPU controls the process
RACK0
yellow CPU in rack 0
RACK1
yellow CPU in rack 1
For the interfaces
LINK
green Connection at the PROFINET IO interface is active
RX/TX
orange Receiving or sending data at the PROFINET IO interface.
LINK 1 OK
green Connection via synchronization module 1 is active and OK
LINK 2 OK
green Connection via synchronization module 2 is active and OK
Reset button
You operate the reset button in the following cases:
●
You want to reset the CPU to the factory state, see section Resetting the CPU410-5H to
factory settings (Page 141)
●
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. Use an appropriately
narrow object to press the reset button.