Measurement-computing Serial488/4 Instrukcja Użytkownika Pobierz pdf (Strona 52)

Section 3 Command Descriptions

3.13

M128

will generate a Service Request when the Serial488/4 has used up most of

its available memory. This provides an indication that no further data should be sent

to the serial ports until data is freed. Data may be freed either by reading serial input

data from the Serial488/4, waiting for serial output data to finish being transmitted, or

by flushing a serial port if data is not moving as expected.

Example 1: Enable SRQ on serial data or low memory using dual primary addressing

mode.

PRINT#1,"OUTPUT08;M0X" clear SRQ mask

PRINT#1,"OUTPUT08;M1X"

select SRQ on serial port 1 data

PRINT#1,"OUTPUT08;M2X"

select SRQ on serial port 2 data

PRINT#1,"OUTPUT08;M4X"

select SRQ on serial port 3 data

PRINT#1,"OUTPUT08;M8X"

select SRQ on serial port 4 data

PRINT#1,"OUTPUT08;M128X"

select SRQ memory low

Example 2: Enable SRQ on serial data or low memory using dual primary addressing

mode. This example has the same effect as example 1.

PRINT#1,"OUTPUT08;M132X"

select SRQ on serial data or memory low

Example 3: Enable SRQ on error using secondary addressing mode.

PRINT#1,"OUTPUT0800;M0X"

clear SRQ mask

PRINT#1,"OUTPUT0800;M32X"

select SRQ on command error

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Measurement-computing Serial488/4 Instrukcja Użytkownika Strona 52