Ampcontrol VAA, User Manual

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VOICECOM USER MANUAL ISSUE 4
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The third and fourth lines of this display give a semi-graphical representation of the communications line. Each
display character segment represents a VAA address. Address 1 is at the left end of the third line of the display and
address 15 is at the right end. Address 16 is at the left end of the forth line and address 31 is at the right end.

█ symbol represents a VAA that is connected to the line and communicating with the VCA.

– character indicates that there is no VAA present at that address.

C character indicates an address clash at that address.
Number of VAAs to be Online Value
The top line shows the number of VAA’s that we expect to see online. This value should match the number of VAAs
that are currently installed. This setting is found on menu level 6 and is set at the time of commissioning or whenever
a VAA is added or removed from the line. More information about this setting can be found later in this chapter and in
the Commissioning chapter.
Digital Communication Indicator
While the digital communication protocol is running a spinning bar will appear on the right hand end of the top display
line.
Polling Address Number
While the digital communication protocol is running, the VCA does a ‘round-robin’ scan of every VAA address, 1 to
31. This takes approximately 7 seconds. This number shows which address is currently being scanned and will count
rapidly up through the address range.
Pre-start Request Input and Confirm Output State Indication
The second line of the display shows the current state of the Pre-Start Alarm Request (PSR) digital input and the
Pre-start Confirm (PSC) relay output for this line.
VAA Key Press Indication
There are four █ symbols which will appear on the right hand end of the second line, one for each VAA keypad key.
From left to right, these blocks indicate the CALL EXCHANGE key, CALL LOCAL key, FUNC key and SPEAK key.
When a VAA key is pressed, the respective block will appear.
NOTE: If an address clash has existed for several digital round-robin scans, it will take several more scans once the
clash has been rectified before the C symbol disappears from the line display.
SHORTCUT : Pressing the key will make the display jump to the # of VAA’s to be online configuration page
on menu level 6.
VAA Address Setup Page
Each communication line can support up to 31 VAA units, depending on the I.S. power supply used and cable length.
Utilising both VCA communication lines, the system can communicate with 62 VAAs. Each VAA unit is programmed
with a unique address from 1 to 31. The configuration procedure is the same for VAA units connected to LINE 1 or
LINE 2. The addressing process is carried out using the VAA unit’s unique four-digit serial number engraved on the
front fascia.
TIP: During installation the location and serial number of each VAA unit should be noted. A table should be created
with the VAA serial number, location and chosen address. This will speed up the addressing process.
TIP: Addresses should be allocated sequentially, giving the VAA closest to the controller address 1, second closest
address 2 and so forth.
ENTER