QSC Audio Amplifier Network Monitor CM16a - Manual (Page 25)

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Section 3:
Operation- Recalling Presets Using RLY/TRG IN
There are three operating modes for recalling presets using the RLY/TRG IN of the CM16a and a
set of external contacts (switch, relay or other such device). These modes are set up and accessed using
the QSControl software or RS232/Telnet sessions. The purpose of this portion of the manual is to outline the current
implementation of this feature. Be aware that the software and firmware of the CM16a are subject to continuous
improvement and therefore this text can not be guaranteed accurate. Refer to the Qscontrol software help file for the
most up-to-date information.
MODE #2- Recal Preset 15 when the contacts connected to the RLY/TRG IN are closed. Restore previous settings when contacts connected
to RLY/TRG IN are opened. Preset 14 is used as a “scratchpad” and is OVERWRITTEN. Whatever was in Preset 14 is GONE forever.
MODE #1- Recall Preset 15 when contacts connected to RLY/TRG IN contacts are opened. Restore previous settings when contacts
connected to RLY/TRG IN are closed. Preset 14 is used as a “scratchpad” and is OVERWRITTEN. Whatever was in Preset 14 is GONE forever.
Once in this mode, the first time there is a transition from contacts closed to contacts opened, the currently running
settings will be saved , and the settings in preset 15 will be recalled. When the contacts attached to the RLY/TRG
IN are again closed, the settings will revert to their previous values/positions. This could be used for a paging
application where the program inputs are temporarily muted and the page input routed to the outputs; after the
page, the sytem reverts back to it’s previous opearting setup.
This mode is identical to MODE #1 (above) with the exception that the closed and open contact operation is
swapped. Once in this mode, the first time there is a transition from contacts opened to contacts closed, the currently
running settings will be saved , and the settings in Preset 15 will be recalled. When the contacts attached to the
RLY/TRG IN are again opened, the settings will revert to their previous values/positions.
MODE #3- Recall Preset 14 when the contacts connected to the RLY/TRG IN are closed. Restore Preset 15 when the contacts connected
to RLY/TRG IN are opened. In this mode, Preset 14 WILL NOT be overwritten.
Note that the presets will only be recalled starting with the first transition of the contacts (opened OR closed). For example, if we are
currently running Preset 2 with the contacts connected to RLY/TRG IN closed, and then change to MODE #3, nothing will happen except
continuing operation in Preset 2. Now, if the contacts are opened, Preset 15 will be recalled. Finally, if the contacts are closed now, Preset
14 will now be recalled. At this point, you can not recall Preset 2 without using the control software. Only Preset 14 & 15 will be available
using the contact I/0.
Once in this mode, the first time there is a transition from contacts open to contacts closed, Preset 14 will be recalled
OR the first time there is a transition from contacts closed to contacts open, Preset 15 will be recalled. After the
first transition, the CM16a will toggle between Preset 14 and Preset 15 with the corresponding contact closed/open
position.