ABB LD800HSE 3BDH000320R02 Extended RAM Test Configuration

Description

During start-up of the device, several hardware components of the system are tested.
For runtime reasons, the test is divided in several parts. In the first part, which is
carried through with each start, the following components are checked:
• Access to RAM
• Checksum test of flash content (firmware)
• H1 channel: transmission and reception by internal loopback
• Interrupt triggering of the H1 controllers
In addition, all LEDs are briefly switched on during booting for an optical
performance test.

The RAM test checks whether the entire RAM memory space can be accessed and
whether the data are consistent. During the checksum test, the consistency of the
flash memory content is checked. If an error is found during this process, booting
cannot be continued. In that case the linking device tries to fetch a firmware update
from the maintenance server. If the maintenance server is operational and its IP
address is stored in the linking device, the linking device downloads the flash
memory content from the maintenance server by means of the Bootp/TFTP
protocol. After a flash memory update, all FF configuration data will be lost, but the
IP configuration is still valid.
Supplementary RAM tests can be performed as well by clicking the button Enable
Extended RAM Test and Reboot on the web page RAM Test Configuration in
the Configuration menu (refer RAM Test Configuration on page 71). The extended
RAM tests cover the following aspects:
• RAM address bus
• RAM integrity test

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