Version: 2020-09-04
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How the send line test works
The Send Line Check is a test procedure in which all modules are addressed via a broad cast signal, starting from the BACS BUS
Converter.
As soon as you start this test, the Send Line Check specifies a current state that the LEDs on the BACS modules should show:
Modules that do not adhere to this guideline can be found easily. If several faults are found within a ring cabling, the outermost fault as
well as a non-responding module chain is visible:
in this example, the red marked modules will show connection problems - everything between the broken cables will not be reachable.
With this test, one can narrow down the sources of error, but do not clearly determine the reason for this problem.
It may be...
- a broken cable
- a broken module port
- a broken port of the module before the error
- a broken module itself
The disadvantage of ring cabling while running this test, is the fact that a defective BACS module would immediately attract attention,
but a single defective cable or a BACS module with a defective cable socket cannot appear. you need at least a completely broken
module or two "half-broken" parts to find an issue:
By a single cabling defect, the redundancy behavior of the ring cabling would inevitably find all modules in the query.
What you can do
You can perform a redundancy test on known defects and determine a general availability of all modules.
By contrast, the same test running on a simple wiring:
You would only reveal the first problem inside a BACS string.
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