Measurement-computing Digital488/80A Manuale Utente Scaricare il pdf (Pagina 53)

A - Bit Set

SYNTAX

Abit Set bit to logic 1, where bit = bit value from 1 to 40.

A? Returns bit of the last bit that was set.

DESCRIPTION

The Bit Set (

A) command programs a logic 1 output to a bit described by the argument bit. Setting a bit may

represent either a +5 volt or a 0 volt output, depending on whether an Invert command (

I16) has been sent. If data is

active high (default condition), then Bit Set outputs +5 volts. If multiple bits are to be set within the same command

string, then an Execute (

X) command must follow every Bit Set (A) command.

To be valid, the bit being set must have been configured as an output bit, by the Configuration (

C) command. The Data

Strobe output line is not pulsed when the Bit Set (A) command is sent.

CAUTION

Because the Configuration (C) command is used, the following programming

example(s) will not work properly if the HVCX1 option is installed with a conflicting

hardware configuration. To be safe, remove the HVCX1 board and replace it with the

jumper board to run the example(s).

EXAMPLE 1: Using Dual Primary addressing mode to communicate with Channel 0.

PRINT#1,"CLEAR08"

Line 1: Reset the Digital488/80A.

PRINT#1,"OUTPUT08;C5P0X"

Line 2: Configure all 5 ports as output; select all 5 ports.

PRINT#1,"OUTPUT08;A22X"

Line 3: Set Bit 22 to a logic 1 (+5 volts).

PRINT#1,"OUTPUT08;A23X A24X"

Line 4: Set Bits 23 and 24 to a logic 1 (+5 volts).

EXAMPLE 2: Using Secondary addressing mode to communicate with Channel 0.

PRINT#1,"CLEAR0800"

Line 1: Reset the Digital488/80A.

PRINT#1,"OUTPUT0800;C5P0X"

Line 2: Configure all 5 ports as output; select all 5 ports.

PRINT#1,"OUTPUT0800;A22X"

Line 3: Set Bit 22 to a logic 1 (+5 volts).

PRINT#1,"OUTPUT0800;A23X A24X"

Line 4: Set Bits 23 and 24 to a logic 1 (+5 volts).

Digital488/80A User’s Manual

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Measurement-computing Digital488/80A Manuale Utente Pagina 53