Lenze DDS v2.3 Uživatelský manuál stáhnout pdf (Strana 40)

100

101

Drive PLC Developer Studio

Programming languages

4-2

DDS EN 2.3

4.2 Instruction list (IL)

An instruction list (IL) consists of a sequence of instructions.

• Each instruction starts with a new line, contains an operator and - depending on the type of

operation - one or several comma-separated operands.

• An instruction may be preceded by a jump label followed by a colon (;).

• Additional comments can be entered.

• Blank lines may be inserted between instructions.

• All commands are saved in an accumulator where intermediate results and the result of the

last command are stored.

Example:

LD 17

ST lint (* comment *)

GE 5

JMPC next

LD idword

EQ istruct.sdword

STN test

4.2.1 Operators and modifiers

The following operators and modifiers can be used in IL.

Modifiers

• C: conditional for JMP, CAL, RET:

The instruction will only be carried out if the result of the preceding expression is TRUE.

• N for JMPC, CALC, RETC:

The instruction will only be carried out if the result of the preceding expression is FALSE.

• N otherwise

Negation of the operand (not of the accumulator).

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