56
MANUAL P/N 316005 REV: B
Chapter 6 - The RS-232 Module
6.1 Introduction
The RS-232 Interface Module for the 316 Vacuum Gauge Controller allows data output to a host computer.
Output is either by a command-response mechanism or by a talk-only mode which is invoked via a switch on
the RS-232 PC board.
A variety of baud rates and byte framing options are available, as well as switches to force the handshake
lines to an "always true" condition.
6.2 RS-232 Installation
All DIP switches on the RS-232 module are read by the microprocessor only during the power-up sequence.
To change any of the switch functions you must change the switch setting then cycle the power to the 316
controller. When the switch is in the OFF position, the switch is away from the PC board.
The interface protocol is set using 8 switches as illustrated in the tables below, and Figure 6-1. Switch S1 is
the Talk Only switch, shown at the top of the illustration. When shipped from the factory, the interface is set at
9600 baud, 8 character bits, 2 stop bits, no parity bit, DCD, CTS and DSR forced "true", and Talk-Only mode
disabled.
6.2.1 Selecting the Byte Format
6.2.2 Baud Rate
Dip switches 6 ,7, and 8 are used to control the baud rate.
S6
S7
S8
Baud Rate
On
On
On
9600
(default)
On
On
Off
4800
On
Off
On
2400
On
Off
Off
1200
Off
On
On
600
Off
On
Off
300
Off
Off
On
150
Off
Off
Off
75
6.2.3 Character Framing
Switches 3, 4, and 5 control parity, number of character and stop bits:
S3
S4
S5
Character
Bits
Parity
Stop Bits
On
On
On
8
None
2
(default)
On
On
Off
8
Even
1
On
Off
On
8
Odd
1
On
Off
Off
7
None
2
Off
On
On
7
Even
1
Off
On
Off
7
Odd
1
Off
Off
On
7
Even
2
Off
Off
Off
7
Odd
2
Содержание Granville-Phillips Convectron 316 Series
Страница 11: ...12 MANUAL P N 316005 REV B Figure 1 3 Mounting Configurations...
Страница 26: ...MANUAL P N 316005 REV B 27 Figure 2 3 Convectron Gauge Indicated vs True Pressure Curve 0 1 to 100 mTorr...
Страница 27: ...28 MANUAL P N 316005 REV B Figure 2 4 Convectron Gauge Indicated vs True Pressure Curve 0 1 to 1000 Torr...
Страница 28: ...MANUAL P N 316005 REV B 29 Figure 2 5 Convectron Gauge Indicated vs True Pressure Curve 0 1 to 1000 Torr...
Страница 29: ...30 MANUAL P N 316005 REV B Figure 2 6 Convectron Gauge Indicated vs True Pressure Curve 10 4 to 0 1 mbar...
Страница 30: ...MANUAL P N 316005 REV B 31 Figure 2 7 Convectron Gauge Indicated vs True Pressure Curve 0 1 to 1000 mbar...
Страница 31: ...32 MANUAL P N 316005 REV B Figure 2 8 Convectron Gauge Indicated vs True Pressure Curve 0 1 to 1000 mbar...
Страница 75: ...76 MANUAL P N 316005 REV B...
