14 Auto/Manual
General Rules
The following rules apply to the granting and releasing of Manual control:
1. Manual control is requested through a one-time request (Auto/Man toggle, not
continuously asserted). Once granted, the terminal holds Manual control until
the Auto/Man button is pressed again, which releases Manual control (e.g. back
to Auto mode).
2. Manual control can be granted to a device only if another device does not
presently own Manual control.
3. Local control has priority over Manual control and can terminate the manual
state of a device.
4. Any connected HIM will indicate when it has been granted Manual control, but
will not indicate the manual status of other devices.
5. If the drive is configured such that the HIM can not select the reference (via
Reference Mask setting), the drive will not allow the HIM to acquire Manual
control. If the Reference Mask for a device’s port becomes masked while that
device is in Manual control, then Manual control will be released.
6. If a terminal has Manual control and clears its DPI logic mask (allowing
disconnect of the terminal), then Manual control will be released. 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 HIM that executes a Logout. If the Logic Mask for a device’s
port becomes masked while that device is in Manual control, then Manual
control will be released.
7. If a com loss fault occurs on a device that has Manual control, then Manual
control will be released.
8. Manual control cannot be granted to a device which is already assigned as a
reference in Auto mode.
9. When a restore factory defaults is performed Manual control is aborted.
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