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SimplIQ Software Manual 4BThe SimplIQ User Programming Language

MAN-SIMSW (Ver. 1.4)

5-3

5.2 Single and Multiple Command Execution

A single line in a SimplIQ program is executed as a single unit, preventing intervention by

the Interpreter or by a CAN command. For example, in the sequence:

UM=5;

MO=1;

an Interpreter command could be executed between the execution of the two program

statements. If, for example, the Interpreter statement between these two lines is

UM=2, MO=1

would be specified for a wrong unit mode. The sequence:

MO=0; UM=5; MO=1; BG

guarantees that

MO=1

is executed with the correct unit mode, because no other command

can intrude.

The policy of executing a full line ensures that commands are executed in a guaranteed

sequence and enables the user to regulate the speed of program execution. The more

commands in a single program line, the faster program execution will be, at the expense of a

slower response to host communications.

Note, however, that a drawback to this policy is that if the execution of a single program line

takes a long time, or if it loops internally forever, the

SimplIQ drive may become totally

unresponsive to its CAN and RS-232 communication. In order to reduce this hazard, the

execution of a single program line is time-out protected by a limitation of 3 seconds as the

maximum time that program line execution can last. If a program line executes more than 3

seconds, the

SimplIQ drive stops it with error code 96: User Program Time Out.

5.3 Standard Conventions

A user program contains lines of text code, which must use defined syntax in order for the

Compiler to recognize it. This section describes common elements of program text.

5.3.1 Line and Expression Termination

A line can have the following terminators: carriage return, line feed or their combination. A

line may contain a single expression or a sequence of expressions. Expressions in a sequence

on the same line can be separated with a semicolon or comma (not inside parentheses or

brackets).

Examples:

a = 3 , b = 2 , c = a + b ,

One line of three expressions separated by commas

a = 3 ; b = 2 ; c = a + b ;

One line of three expressions separated by semicolons

a = 3 , b = 2 ; c = a + b

One line of three expressions separated by a comma, a

semicolon and terminated with a line feed

[a,b] = func (23, c, 3.14)

An expression in which the comma is not an

expression separator because it is inside parentheses

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