GDU
27-1500
Original Instructions
13
9901X0265 Issue 2
The command format is :-
IPCFG <IP address> <gateway address> <subnet mask>
For example IPCFG 192.168.1.10 192.168.1.254 255.255.255.0
If the IPCFG command is sent with no parameters, the unit responds with the
current IP configuration. This command may be used to confirm what IP
address has been assigned to the unit.
2.9
Switching On
The memory in the GDU is non-volatile and data is retained in the case of a power
outage. The system also has circuitry to detect a power failure.
On power up the system checks the power status and the integrity of any test data in
the memory. Both the blue POWER and red PWR FAIL indicators on the front panel of
the CPU module will be lit. If the memory check fails the red ERROR indicator will also
be on.
Unless there is a problem with the CPU the GDU should always power up on with the
PWR FAIL indicator on. Failure to do so may indicate that the data or firmware has
been corrupted.
2.10 Power Failure Recovery
The GDU
’s data storage memory is retained in the absence of a mains supply. The
retention period for this memory is in excess of 5 years.
If the mains supply voltage drops below 200 VAC (or approximately 100 VAC in 110
VAC regions) the processor is liable to go into random states. However, special
memory protection is triggered if the supply drops below this level. If the supply
continues to fall the memory and RTC power are protected. When the mains power
returns to normal, the protection circuit waits momentarily for the power supplies to
stabilize and then allows the processor to start operating. If the memory fails on power
up the GDU indicates this with the ERROR LED.
Some test types may be able to continue in the event of a short power outage. The
PWR FAIL indicator is used as direct indication that a power-failure has occurred. This
is important if the GDU is to be left unattended for long periods of time, when this
indicator can act as
“tell-tale”. On power up the GDU will be in the idle state and no
more tests can be started, data may only be retrieved if it is not corrupt. At the users
discretion some test types may continue although the test result cannot be guaranteed
to be accurate.
New tests should not be commenced until the PWR FAIL indicator has been cleared.
This is a protection feature as it forces the user to recall all previous readings into the
host microcomputer before continuing. After this, the GDU can be reset with the
RESET command to correctly initialise memory and all the GDU
’s internal systems.
NOTE: if turning the GDU off and back on again does not cause the POWER Indicator
to come on then there may be a fault with the CPU, the internal or external power
supply or a blown fuse.
