Measurement-computing Personal488 rev.3.0 For DOS & Windows 3.Xi Instrukcja Użytkownika Pobierz pdf (Strona 155)

9B. Installation & Configuration II. SOFTWARE GUIDES - 9. Driver488/SUB

II-140 Personal488 User’s Manual, Rev. 3.0

Configuration of Serial Interfaces

The following Driver488/SUB

screen displays the

configuration of a serial (COM)

interface.

To add another serial interface,

select

<F3>

The following serial interface

parameters are available for

modification.

Configuration Parameters

•

Name: This field is a

descriptive instrument

name which is manually

assigned. This must be a

unique name.

•

Baud Rate: The

allowable Data Rates range

from 75 to 115.2K and all

standard rates therein. This includes: 75, 110, 150, 300, 600, 1200, 1800, 2400, 4800, 9600,

19.2K, 38.4K, 57.6K, and 115.2K. Slower processors may have difficulty at the higher data rates

because of the amount of processing required for terminator, end of buffer, and fill processing.

•

Flow:

X-ON/X-OFF

is supported. With this configured, Driver488/SUB scans incoming

characters for an

X-OFF

character. Once it is received, no more characters are transmitted until an

X-ON

character is received. The driver also issues an

X-OFF

to ask the attached device to stop

sending when its internal buffer becomes three-quarters full and issues an

X-ON

when its buffer has

emptied to one-quarter full.

•

Interrupt: A hardware interrupt level can be

specified to improve the efficiency of the I/O

adapter control and communication using

Driver488/SUB. For any use of

OnEvent

and

Arm

functions, an interrupt level must be

selected. If no interrupt level is to be used,

select NONE. Valid interrupt levels depend

on the device type:

•

Input Buffer: This field is used to enter the buffer sizes for I/O.

•

Output Buffer: This field is used to enter the buffer sizes for I/O.

•

Parity: Parity can be EVEN, ODD, NONE, MARK, or SPACE.

•

CTS Timeout: The driver supports 3 hardware handshake lines: Data Carrier Detect (

DCD

), Data

Set Ready (

DSR

), and Clear To Send (

CTS

). Each line can be individually designated to be

ignored, used with no specified timeout, or used with a selected timeout. The timeout is selected

by specifying the number of milliseconds to wait for the indicated condition to become satisfied.

•

Data Bits: Data formats from 5 though 8 Data Bits are supported.

•

DSR Timeout: The driver supports 3 hardware handshake lines: Data Carrier Detect (

DCD

), Data

Set Ready (

DSR

), and Clear To Send (

CTS

). Each line can be individually designated to be

ignored, used with no specified timeout, or used with a selected timeout. The timeout is selected

by specifying the number of milliseconds to wait for the indicated condition to become satisfied.

•

Stop Bits: With 6, 7, or 8 Data Bits specified, either 1 or 2 Stop Bits are allowed. With 5 Data

Bits specified, 1 or 1.5 Stop Bits may be selected.

I/O Comm. Typical Interrupt Level

COM1 typically level 4

COM2 typically level 3

COM3 typically level 4 or 5

COM4 typically level 2 or 3

1 2 ... 150 151 152 153 154 155 156 157 158 159 160 ... 399 400

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