Table of Contents
Advertisement
RS-232C interface
Software specifications (Protocol)
1. Communication parameters
Communication
Asynchronous, full duplex
system
Communication
300/600/1200/2400/4800/9600
speed
Bit length
7bit/8 bit
Stop bit
1 bit/2 bit
Parity bit
NONE/ODD/EVEN
ACK code
ACK code returned/ACK code not returned
<Note>
The ACK code is what is returned from the
VTR to the controller when data has been
successfully sent from the controller.
The underlining indicates the factory settings.
Any changes to the settings can be made using the
setup menu items listed below.
Communication
parameter
Communication
No.205 BAUD RATE
speed
Bit length
No.206 DATA LENGTH
Stop bit
No.207 STOP BIT
Parity bit
No.208 PARITY
ACK code
No.209 RETURN ACK
(continued)
Setup menu item
2. Send format
[controller (PC) 5 VTR]
$ Data format
[STX] [command] [:]
02h
XX XX XX
3Ah
20H<XX<7FH
(XX = ASCII code: symbols, numbers upper-case
letters)
[command] :
Command identifier; a 3-byte identifier (ASCII
code: symbols, numbers, upper-case letters) is
sent as the command.
[ : ] :
This code serves as a delimiter between the
command and data.
[data] :
Data (ASCII code: symbols, numbers, upper-case
letters) can be added in the number of bytes
required.
$ Outline of send procedure from controller
1 The send command starts with STX (start of text =
02h).
The command is then identified by COMMAND
which follows and the data is added as required.
The format ends with ETX (end of text = 03h).
2 When a different command is to be sent, a response
is awaited from the VTR, and then the command is
sent. (See page 79.)
3 If STX is sent again before ETX is sent, the receive
data buffer inside the VTR is cleared. A command
error is returned to the controller, and the data is
newly processed with STX which was received
again at the head.
[data]
[ETX]
XX ..... XX
03h
77 (E)
Advertisement
Table of Contents
