Remote-processing BASIC for the CX-10 Modbus Bedienungsanleitung PDF herunterladen (Seite 4)

BASIC PROGRAMMING GUIDE

1-1

PREFACE

This programming guide is for Remote Processing

CX-10 or similar controllers using a variation of

BASIC-52 language. It was derived from Intel

MCS-51 BASIC, V1.1. Several command

extensions and features have been added to

effectively speed up command execution.

Buffered serial ports. Received characters are

buffered to 256 characters. PRINT strings are

put into a 256 character buffer, making it much

faster.

Modbus protocol support

Some control and timing functions such as

TICK(0) and ONTICK

Some cards do not have all hardware features so do

not support all of the commands. Cards supported or

exceptions are listed with each command. In some

cases you must refer to your hardware manual for

exact ranges.

A few original BASIC-52 commands have been

removed. These commands were oriented around

specific registers in the 8052 chip or a specific

design.

MANUAL CONVENTIONS

Information appearing on your screen is shown in a

different type.

Example:

RPBASIC-52 V1.0

Bytes free: 27434

Symbols and Terminology

<xxx> Paired angle brackets are used to indicate a

specific key on your keyboard. For

example, <esc> means the escape key.

expr

Term meaning a number, simple

variable, or mathematical expression

involving variables and numbers. The

following are valid

expr

45.3

CYCLE

B*45

C*D+54

INT(D)

expr

can be another function.

Complexity of

expr

is limited by

available stack memory. Usually this is

7 levels of parentheses.

For clarity,

expr

may be another name

such as

position

channel

, and so on.

italic

Italicized variables require an

expression or value. For example:

AIN(

channel

)

KEYPAD(

function

)

Ellipsis (...) follow an instruction which optionally

accept more data.

DATA

data[,data][,data]

...

READ

variable[,variable]

...

Optional portions of an instruction are enclosed in

brackets []:

DISPLAY

option[,option][,option]

1 2 3 4 5 6 7 8 9 ... 83 84

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