Push Word Accumulator Onto The Data Stack (Psw); Pull Logic Accumulator From The Data Stack (Pll) - HEIDENHAIN iTNC 530 HSCI Technical Manual

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9.8.62 PUSH WORD ACCUMULATOR ONTO THE DATA STACK (PSW)

PSW (PUSH WORDACCU)

The PSW command enables you to buffer the word accumulator. With the

PSW command, the iTNC copies the word accumulator onto the data stack.

The content of the word accumulator (32 bits) occupies two words on the data

stack. In the event of a stack overflow, the iTNC displays an error message.

Since the sequence is the same for all stack operations, this example also

applies to the commands PS, PL, PSW, PLL, PLW. The difference between

the individual operations lies merely in the transferred data width.

Call Module 15 at a certain place in the program. After returning to the main

program, restore the original accumulator content. Accumulator content

before the module call: 1A 44 3E 18

Buffer the word

accumulator in the data

Call subroutine 15

Restore data stack into

word accumulator.

PLL (PULL LOGICACCU)

The PLL command is the counterpart to the PSL command. Data that has been

buffered with the PUSH command can be restored from the data stack by

using the PULL command. The iTNC copies bit 7 of the data stack's current

address into the logic accumulator. If the stack is empty, the iTNC displays an

error message.

See PSW command.

9.8 Command Set