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ISTRUZIONI ORIGINALI
PIN N.
SIGNAL NAME
1
+5 V (OUT) (Reserved)
2
TX (RS232
3
RX (RS232
4
NC
5
GND
6
A + (RS485)
7
NC
8
B – (RS485)
9
RESERVED
Connector Examples:
5
2
PC
3
RS – 232 Connection
RS – 485 Connection
The communication port mating connector is sup-
plied with the RS 232 PCB (AMP/Cannon or
equivalent 15-pin "D" type male connector).
For example, the Transmit data signal from con-
troller (pin 2) must be connected to the host com-
puter's receive data line (pin 2) and vice versa.
Consult the host computer's instruction manual for
its serial port connections.
NOTE
Varian cannot guarantee compliance with FCC
regulations for radiated emissions unless all ex-
5
TV 301 AG
2
Rack Controller
3
97/105
TECHNICAL INFORMATION
ternal wiring is shielded, with the shield being ter-
minated
to
the
metal
subconnector. The cable should be secured to the
connector with screws.
Serial Communication Descriptions
This unit can comunicate by two different protocol:
− protocol (old system) "letter"
− "Window" protocol (new system)
These two protocols can be used as well with 232
or 485 media.
NOTE
Please use "Window" protocol for new develop-
ment.
LETTER PROTOCOL DESCRIPTION:
The default protocol is "Window"
Communication format:
• 8 data bit
• no parity
• 1 stop bit
• The baud rate is programmable via front panel
from 600 to 9600 baud. The controller is fac-
tory-set for 9600 baud operation.
Communication protocol:
Host = Master
Turbo-V 301 Controller = Slave
The communication is performed in the following
way:
Host
Request is an ASCII character identifying the ac-
tion that must be performed by the controller or
the requested information.
Allowed ASCII characters:
• "A" = START
• "B" = STOP
• "C" = Low Speed ON
shroud
on
the
Turbo-V 301 Controller
87-901-005-01(A)
0-
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