J5 Rs-232 Interface Connector; Data Exchange Protocols; Rs-232 Protocol 1 Communication Description; Communication Protocol - Varian Turbo-V 81 PCB 24 Vdc Manual De Instrucciones

Th
e following figure shows a typical contact logic input
connection and the related simplified circuit of the
controller.
Typical Logic Input
The following figure shows a typical logic output
connection, but any other device may be connected,
and the related simplified circuit of the controller.
Typical Logic Output

J5 RS-232 Interface Connector

J2 – Interface Connector
The signal of J5, the RS-232 interface connector, are
the following:
•
Pin 1 Ground.
•
Pin 2 RXD. Received data.
•
Pin 3 TXD. Transmitted data.
•
Pin 4 24 Vdc Output (power supply to HHT, if
necessary)

DATA EXCHANGE PROTOCOLS

This controller can use protocol 1 or 2 on its RS 232
port. During
automatically recognizes the type of protocol used by
the peripheral
consequently adapts itself.
+5 V
The identified protocol is kept active until the controller
is powered off.

RS-232 Protocol 1 Communication Description

Communication format:
•
8 data bit
•
no parity
•
stop bit
•
The baud rate is programmable via a set of jumper
W7 between 4800 and 9600 baud. The controller is
factory-set for 9600 baud operation.

Communication Protocol

The communication protocol is of the master/slave
type, where:
•
Host = Master
•
Controller = slave
To send a command by the serial interface, the
controller must be set to "REMOTE OFF" of operation,
otherwise it is only possible to read the data.
The master send to the slave a word according to the
following format:
slave
parameter
address
number
where:
•
Slave Address: controller number requested by the
master. In RS-232 version the address is set equal
to "001";
56
TECHNICAL INFORMATION
power on, the controller's
to which it will interface
NOTE
NOTE
data field
data
length
87-900-121-01 (B)
logic
and
check-
CR
sum