Auto / Manual 2-23
2. Manual control can only be granted to the TB or to a programming
terminal (e.g. HIM) if Manual control is not already being exercised by
the TB or another programming terminal at the time.
3. Manual control can only be granted to a terminal if no other device has
Local control already asserted (i.e. no other device has ownership of the
Local control function).
4. A HIM (or TB) with Manual control active can have it taken away if
another DPI port requests, and is granted Local control. In this case
when Local control is released the drive will not go back to Manual
control, Manual control must be again requested (edge based request, see
1. above). This is true for both the HIM and the TB (i.e. if the TB switch
was in the Manual position it must be switched to Auto and back to
Manual to get Manual control again).
5. The status indicator (point LED on LED HIM & Text on LCD HIM) will
indicate when that particular terminal has been granted Manual control,
not the fact any terminal connected has Manual control and not the fact
that the particular terminal has simply asked for Manual control.
6. When Manual control is granted, the drive will latch and save the current
reference value prior to entering Manual. When Manual control is then
released the drive will use that latched reference for the drive until
another DPI device arbitrates ownership and changes the reference to a
different value.
7. If a terminal has Manual control and clears its DPI reference mask
(disallows reference ownership), then Manual control will be released.
By extension, if the drive is configured such that the HIM can not select
the reference (via reference mask setting), then the drive will not allow
the terminal to acquire Manual control.
8. If a terminal has Manual control and clears its DPI logic mask (allowing
disconnect of the terminal), then Manual control will be released. By
extension if the drive is configured such that the HIM can be unplugged
(via logic mask setting), then the drive will not allow the terminal to
acquire Manual control. The disconnect also applies to a DPI HIM that
executes a soft “Logout.”
9. If a com loss fault occurs on a DPI that has Manual control, then Manual
control will be released as a consequence of the fault (on that port which
had Manual control).
10.There will be no way to request and hence no support of the Auto/
Manual feature on old SCANport based HIMs.
11.You can not acquire Manual control if you are already an assigned
source for the DPI port requesting Manual.
12.When a restore factory defaults is performed Manual control is aborted.
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