Measurement-computing Digital488/80A Uživatelský manuál stáhnout pdf (Strana 50)

Command Summary

The following summary presents all 23 of the Digital488/80A commands in alphabetical order according to

their command syntax, plus the Query (

?) command support.

Command Syntax Description

Bit Set

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

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

Bit Clear

Bbit Clear bit to logic 0, where bit = bit value from 1 to 40.

B? Returns bit of the last bit that was cleared.

Configuration

Cn Define I/O mode n of ports, where n = value from 0 to 5.

(Default) Define all 5 ports as input.

Define Port 1 as output; the other ports are input.

Define Ports 1 and 2 as output; the other ports are input.

Define Ports 1 through 3 as output; the other ports are input.

Define Ports 1 through 4 as output; Port 5 is input.

Define all 5 ports as output.

C? Returns current port configuration mode n.

Data Output

DvalZ Define data to be outputted, where val = data value,

terminated by

Note:

In the Format

F4 mode, the Z terminator suffix is not used. In

the Format

F5 mode, both the D command prefix and the Z

terminator suffix are not used.

Query Error Status

Returns error status code which indicates the last error

encountered. It returns:

•

E0 if No Error has occurred.

•

E1 if Unrecognized Command.

•

E2 if Invalid Command Parameter.

•

E3 if Command Conflict Error.

•

E5 if Non-Volatile RAM Checksum Failure.

•

E6 if Internal Data Buffer Overrun.

Note:

Except for

E5, error is cleared upon reading error status.

Data Format

Fn Define format n of data, where n = value from 0 to 5.

(Default) Define ASCII hexadecimal (4 bits per character).

Define ASCII character (4 bits per character).

Define ASCII binary (1 bit per character).

Define ASCII decimal (8 bits per number).

Define Binary (each byte = 8 bits).

Define High-speed binary (each byte = 8 bits).

F? Returns current data format n.

Bus Input/Output

Gn Define mode n of data transmission on the IEEE 488 bus when

the Digital488/80A is addressed to Talk, where n = value

from

0 to 4.

(Default) Input and output port data are sent when addressed to

Talk.

Only input port data is sent

Only output port data is sent

Buffered input and output data are sent

Continuous buffered input and output data are sent

G? Returns current bus input/output mode n.

Note:

The amount of data sent is dependent upon the Port Select (

command.

44 Digital488/80A Commands

967695 Digital488/80A User's Manual

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