Rose Electronics Porter User Manual
Page 32
28
PORTER INSTALLATION AND OPERATIONS MANUAL
Test 3 – Static ram read/write test
This test is the same as in the ‘Short Test’
Test 4 – Non-volatile RAM checksum test
This test is the same as in the ‘Short Test’
Test 5 – Port addressing test
This test ensures that the contents of non-volatile memory agree with the port
configuration. If this test fails (see Table VI) then the configuration memory has been
corrupted or a port communication chip has failed. Reload the factory default settings as
described below and retry the test. Make sure there are no cables connected to the
Porter. Re-run the test, if the test still fails then the unit must be serviced. The ADVANCE
switch may be pressed to determine which port is the failing port. BUF, DATA, and BUSY
LEDs will all be lit. The LEDs of all ports which pass will be it. A failing port will have its
corresponding LED off. The SELECT switch may be pressed to execute the test again. In
order to bypass this test completely, both the ADVANCE and SELECT switches may be
pressed.
Test 6 – Module test without loopback
This test ensures that there are no signal shorts on a port. In order for this test to pass,
no equipment should be connected to the Porter. If this test fails (see TABLE VI) then a
port communication chip has failed and the unit must be serviced. The ADVANCE switch
may be pressed to determine which port is the failing port. BUF, DATA, and BUSY will all
be flashing. The LEDs of all ports which pass will be flashing. A failing port will have its
corresponding LED steadily lit. Ports not installed will have their corresponding LEDs off.
This test will continuously execute until all ports pass or the test is bypassed. In order to
bypass this test completely, both the ADVANCE and SELECT switches may be pressed.
Table V Diagnostics LED Display
Legend: M=Mode LED D=Data LED B=Busy LED E=Error LED
= LED off
= LED on
M D B E
1
2
3
4
5
6 7
8
1st
All LEDS on
2nd
Test 1: EPROM checked
3rd
Test 2: 16K RAM buffer
Test 2: 64k RAM buffer
Test 2: 256k RAM buffer
4th
Test 3: Static ram
5th
Test 4: Non-Volatile ram
6th
Test 5: Port type test
7
th
Test 6: Module test