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Operator controls and operating modes of the CPU 410-5H
7.4 Performing a memory reset
CPU 410-5H Process Automation
120
System Manual, 09/2014, A5E31622160-AB
7.4
Performing a memory reset
Memory reset process in the CPU
You can perform a memory reset of the CPU from the programming device. During a
memory reset, the following process occurs on the CPU:
●
The CPU deletes the entire user program in the main memory.
●
The CPU deletes the user program from the load memory.
●
The CPU deletes all counters, bit memories, and timers, but not the time of day.
●
The CPU tests its hardware.
●
The CPU sets its parameters to default settings.
The LEDs behave as following during the memory reset:
1.
The STOP LED flashes for about 1-2 seconds at 2 Hz.
2.
All LEDs light up for approximately 10 seconds.
3.
The STOP LED flashes for about 40 seconds at 2 Hz.
4.
The STOP LED lights up permanently.
Data retained after a memory reset...
The following values are retained after a memory reset:
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The content of the diagnostic buffer
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The baud rate of the DP interface
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The parameters of the PN interfaces
–
Name (NameOfStation)
–
IP address of CPU
–
Subnet mask
–
Static SNMP parameters
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The time of day
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The status and value of the operating hours counter