Page 24 of 102
TVL 351
ISSUE 15
Manually Resettable Events (MAN)
Same as double sided events but additionally these events need to be reset in the “Solutions” menu by a competent
person. These events are the most serious and an investigation in to what caused the problem needs to be carried
out before the lift is returned to service.
Single Sided Events (SGL)
Single sided events have no duration and are logged as asserts e.g. “#11 Engineers Event” (assert).
5.3. I/O Trace
Ethos Two contains a powerful I/O trace facility to track down intermittent faults.
Press: I/O Trace
The I/O Trace screen can be setup to keep a record of 50 I/O transitions for up to 8 Inputs or Outputs. Use the
Signal button to select I/O that is of interest. Once the I/O has been selected the I/O Trace can be set to be triggered
manually or to stop capture when a particular event occurs.
Once triggered, the I/O can be graphically stepped through transition by transition. This gives a powerful way of
tracking down an intermittent input e.g. lock tip or worn contact that is periodically giving the lift problems.
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