TView Pro AV 1600 User's Manual Rev 1.02
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4.3.3 Selecting the TView Pro AV 1600's address
In an RS-422, there may be as many as 8 TView Pro AV 1600s operating within a system. In order to provide a control
mechanism to differentiate each TView Pro AV 1600, the user must program each TView Pro AV 1600's address using
the Front Panel.
Programming the address is a simple procedure. Turn the TView Pro AV 1600 on, or cycle the control sequence such
that the Power Up Identification is visible (i. e. Model 1024 or Model 1600) on the LED display. Press the Right
Arrow Button. You will see the TView Pro AV 1600’s address indicated on the LED display. When you are finished,
press either the + button or the - button. The TView Pro AV 1600 will remember its address until you change it in the
same fashion.
The address circuitry is active even you are using the RS-232 link (which does not permit multiple Pro AV 1600s or
other devices to be connected in a multiple unit configuration). The default address is 0.
4.3.4 Sending Communications Commands to the TView Pro AV 1600
The serial port of the TView Pro AV accepts serial data at 9600 baud, 8data bits, no parity bit, 1 stop bit. It is
essential that the serial communications device that delivers commands to the Pro AV 1600 be set up in this fashion.
The TView Pro AV 1600 accepts 8 bit characters as commands. The commands to turn the TView Pro AV 1600 on
and off are received as strings of ASCII alphabetic characters and binary numbers. For the purposes of this manual,
all ASCII characters and binary numbers will be referred to with the decimal numbering sequence (i. e. the minimum
value of a byte is 0, the maximum value of a byte is 255, the value of an upper case A is 65).
The Command sequence for communicating with the TView Pro AV 1600 is as follows:
1)
The Activation Command is given. The Activation Command consists of the character string: HCRONx
(where x is the address of the TView Pro AV 1600). The Activation Command (and all other commands) must be
followed by a Carriage Return (ASCII character value of 13 decimal) to be accepted.
The following byte string (using decimal values for ASCII characters) indicates a valid Activation Command for a
TView Pro AV 1600 previously programmed to be address 3:
72
67
82
79
78
51
13
H
C
R
O
N
3
<CR>
Note that the address number may be delivered as either ASCII, (decimal 51 in the above case) or binary (ETX or
Control C in the above case).
If the TView Pro AV 1600 receives any unexpected input before the reception of the Activation Command, it will
ignore it. If it receives an unexpected byte during the transmission of the Activation Command, the Activation
Command must be re-transmitted (the Activation sequence is reset).
2)
Individual Commands are given. Any number of commands may be given after the TView Pro AV 1600 is
activated. The TView Pro AV 1600 individual commands consist of 2 byte strings. Each 2 byte string is an internal
Register Number Byte (23 registers exist) followed by a Value Byte. The Value Byte has a different meaning and legal