Measurement-computing Micro 488/EX rev.2.1 Instrukcja Użytkownika Pobierz pdf (Strona 58)

Section 4 General Programming

4.16

Once a condition is enabled it remains enabled until it is

DISARMed

the event specified has occurred or until the Micro488/EX is reset. The

event

DOMACRO

and

ARM

commands are mutually exclusive. The last

command issued takes precedence.

The program which we have been using for the preceding examples,

refer to Appendix D, is a good example of event driven

MACRO

execution. It

uses the

ERROR

event to execute MACRO 4. It also uses the

COMMENT

command to print a

BELL

character (

&H07

) to the screen.

4.4.6 Defining a STARTUP MACRO

One of the major features of the Micro488/EX is the ability to define a

MACRO

which will execute at

STARTUP

(power-on). This allows the

Micro488/EX to be locally programmed and moved to a remote location for

stand-alone data collection from IEEE bus instruments.

A simple example of this

STARTUP

feature would be a test system used

to monitor the power that a device consumes after Sunday at 12:30 AM

over-night. Two instruments are used, one to measure the voltage and the

other to measure the current.

The desired output format is one in which the data could be placed into

a spreadsheet for plotting or analysis. As such, the serial terminator is

disabled and an embedded

TAB

character is placed between data fields using

COMMENT

commands. This will cause the spreadsheet to place the data in

sequential columns. The serial output terminator is set to

to force the

next execution of

MACRO

to place data on a new row.

The defined

MACRO

s would appear as…

MACRO 1

STERM NONE

Serial Output Terminator set to none

TIME

Time Stamp

COMMENT ''

Embedded TAB character to next column

ENTER 16

Get voltage reading

COMMENT ''

Embedded TAB character to next column

STERM CR

Serial Output Terminator set to CR to next row

ENTER 12

Get current reading

ENDM

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 217 218

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