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Store Loop Maintenance Analysis Procedures
MAP 0100: W001 Message
MAP 0110: W003 Message
MAP 0120: W004 Message
MAP 0130: W005 Message
MAP 0140: W762 Message
MAP 0150: W764 Message
MAP 0160: W772 Message
Store Loop MAPs
The following store loop maintenance analysis procedures
(MAPs) were written for the 4680 store system. Since store loop operation
is the same for 4693, 4684, and 4683 terminals, they
can be applied to either.
When reviewing these MAPs, the various models of terminals
may be interchanged according to the following chart:
4684-XXX may also be 4693-541
4683-XX1 may also be 4693-421 or 4693-321
4683-X02 may also be 4693-202
This section contains information that can be used to
learn more about the store loop and its failure modes.
- The following full-page figures represent
a typical store loop, using the IBM loop wiring concentrator.
- Each figure represents the same store
loop, each with the following conditions:
Store loop with an open condition in the top
loop wiring concentrator.
Store loop with the primary store controller offline.
Store loop with an open condition in bottom
loop wiring concentrator.
Store loop with a failing point-of-sale terminal.
- Your store loop may not be wired like
this, but the position of your 4683s on the loop and the relationship to
the store controller is similar.
- The 4683-P can also be a 4683-001 or
4683-A01. The 4683-002 can also be a 4683-A02.
- The terminal numbers are shown in numeric
order, but they can be put in any order on your store loop.
- The store controller transmits data to
the first 4683 down-loop on the store loop. This 4683 receives the
data and passes it to the next 4683 down-loop. This continues with
each 4683 receiving data from the 4683 immediately up-loop from its position,
and passing it on to the next 4683 down-loop. The last 4683 down-loop
passes the data back to the store controller.
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