Siemens SINUMERIK 840Di Function Manual page 661

Basic machine

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N100 $SC_MAX_BLOCKS_IN_IPOBUFFER = 5

............

N200 $SC_MAX_BLOCKS_IN_IPOBUFFER = -1

............

Program display modes

Basic block display

A second socalled basic block display can be used with the existing block display to show all

blocks that produce an action on the machine.

Look Ahead basic block display

The actually approached end positions are shown as an absolute position. The position

values refer either to the workpiece coordinate system (WCS) or the settable zero system

The number of Look Ahead display blocks stored in the display buffer depends on the

number of prepared blocks in the NCK preprocessing buffer in the relevant processing state.

If a preprocessing stop is processed, the number of display blocks is reduced to zero and

increases again after the stop is acknowledged. In the case of REORG events (e.g., mode

change, ASUB start), the display blocks stored for Look Ahead are deleted and

preprocessed again afterwards.

Processed values

Values preprocessed in the basic block display coincide with the:

• Selected tools

• Feed and spindle speed

• Position values actually approached

Mode Group, Channel, Program Operation, Reset Response (K1)

Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0

Discrepancies can occur when tool radius compensation is active.

Detailed Description

2.9 Program control

Limitation of IPO buffer to 5 NC

Cancellation of the IPO buffer

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