Ascii Editor; Program Format - HEIDENHAIN iTNC 530 HSCI Technical Manual

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9.7.1 ASCII editor

The error code in W1002 can be output and evaluated in the PLC program. The

following applies to the evaluation of the error code, which should be

performed during the first PLC run-through:

• W1002 = 0: No PLC run-time error occurred before the last PLC

program start

• W1002 = 1: Error information in W1002 is invalid (e.g. because of an

error in the hardware). If necessary: Implement safety reaction.

• W1002 ≥ 50: PLC run-time error with number code (see the

PLCdesignNT help for the error name). If necessary: Implement safety

When creating service files or shutting down the control, the nonvolatile

memory of the PLC program is automatically saved to the file

PLC:\JHPLCLOG\PLCREMADATA.LOG. Restoring the nonvolatile area from

the file is possible only by using the RESTORE M/B/W/D soft key in the PLC

mode of operation under the TABLE soft key.

With the integrated editor you can create the PLC program and all other

necessary files right at the control through the ASCII keyboard. You will find a

comprehensive description of the editor including its soft keys in the User's

Manual of the control.

A command is the smallest unit of a PLC program. It consists of the operation

part and the operand part.

The operation describes the function to be executed. It defines how the

operand is to be processed by the iTNC. The operand shows what is to be

operated with. It consists of the operand abbreviation and a parameter

(address). With the PLC commands you can combine (gate), delete and load

processing, you can address memory contents with a length of 8 bits (byte),

16 bits (word) or 32 bits (double word).

9.7 Program Creation