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18.5. SCU TESTING
18.5.1.
SSC Downloading
Set up
IOP-0 is INS-ACT
AP completely initialised, its all units are inservice, AP-0 INS-ACT, AP-1
INS-SBY. All HMS cards in HPU are jacked in.
All the cards are equipped in SCU and all four PSUs are switched off
Connect VDU Terminals on both SSC controllers through BP terminal
cable.
Each SSC has links to all the four CMSs (HMSs) but AP has links only to
CMS1 and CMS2. SSC code loading take place through active AP via CMS1
or CMS2. For complete testing of SSC initialisation with active AP all the
different combinations are to be checked.
1.
2.
3.
4.
5.
6.
7.
8.
INSTALLATION MANUAL
Switch on four PSUs of SCU and check that LEDs of all PSU's are
glowing.
Ensure power-on tests for SSC-0 and SSC-1 are successfully
completed.
Give reset on SSC-1 and make sure that SSC-0 has started code
loading. Check the message on SSC-0 terminals for both ports enabled,
i.e., it has access to both memories. Message will come as PO-1E on
SSC-0 terminal.
Wait for some time so that a few blocks of code is loaded i.e. 0K, 36K,
72K .....
Now give a reset on CMS1 card, (Refer Fig. 18.1 for identification of
switch units and corresponding physical cards) SSC-0 terminal will
print LF 66 and will continue down loading through CMS2.
Give reset to CMS2 now SSC-0 terminal will print LF 67 but code
loading will continue through CMS1.
Give a reset to SSC-0 now SSC-0 link to active AP is broken, SSC-1
will take over code load through CMS1 and CMS2. Check the message
PO-1E on SSC-1 terminal for both memory ports enabled.
Repeat steps 4,5,6 for checking SSC-1 down loading with both CMS1
and CMS2.
FUNCTIONAL TESTING
351
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