Ampcontrol VAA, User Manual

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VOICECOM USER MANUAL ISSUE 4
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To initiate a voice message:
1. Write the desired message number 1 to 255 to VCA Modbus address 0 (zero).
2. The message number value will remain at that address until the message has played to completion. This
allows the control device to know that a message is playing, what message it is and when it has played to
completion
3. When the message has completed and no other messages are playing, the value at address 0 (zero) is 0
(zero).
Stopping a voice message:
Writing 0 (zero) to address 0 (zero) will cancel the voice message currently playing.
Message Queuing
The VCA can queue one message while another is playing. For example, while message 20 is playing, message 100
can be written to Modbus address 0 (zero). Message 20 will play to completion, immediately followed by message
100.
Joining messages together:
Joining messages together can be prudent when there are a number of common messages that can apply to a
number of locations, conveyor belt stations for example. A belt station could be “tripped”, “isolation requested” or
“remotely isolated”. These could be recorded as separate messages. Then a series of messages could be recorded
like “at station 1”, “at station 2”, etc. These messages can be joined together – played one after the other – to form a
complete message. Take a conveyor with 30 belt stations. If individual messages were recorded, 90 messages
would be required: “tripped at station 1”, “isolation requested at station 1”, “belt isolated at station 1”, etc for every
station. However, using the joining method would only require 33 messages to be recorded.
Reading VAA Parameters
The following VAA data can be read via Modbus:

Line Voltage

Battery Voltage

Battery Current

Charging Current Setting

Volume Setting

Audio Threshold Setting

VAA Serial Number