Output Behavior - Siemens SINUMERIK 828D Function Manual

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Output behavior

Thread cutting

During active thread cutting G33, G34 and G35, the following output behavior is always active for the spindle-

specific auxiliary functions:

M3 (spindle right)

M4 (spindle left)

Output duration one OB40 cycle (quick acknowledgment)

Output during motion

The spindle-specific auxiliary function M5 (spindle stop) is always output at the end of the block. The parts

program block that contains M5 is always ended with exact stop, i.e. even during active continuous path mode.

Synchronized actions

With output auxiliary functions from synchronized actions, the parameterized output behavior is ignored except

for the following parameters:

Bit0: Output duration one OB1 cycle (normal acknowledgment)

Bit1: Output duration one OB40 cycle (quick acknowledgment)

Auxiliary functions: M17 or M2 / M30 (end of subroutine)

In its own parts program block

If one of the auxiliary functions M17, M2 or M30 is programmed as the only auxiliary function in a part program

block and an axis is still in motion, the auxiliary function is not output to the PLC until after the axis has stopped.

Overriding the parameterized output behavior

The parameterized output behavior of the auxiliary functions M17 or M2/M30 is overridden by the output behavior

that is determined in the following machine data:

MD20800 $MC_SPF_END_TO_VDI, Bit 0 (subprogram end / stop to PLC)

The auxiliary functions M17 or M2/M30 (subprogram end) are not output to the PLC.

Continuous-path mode is not interrupted at the end of the subroutine

The auxiliary functions M17 or M2/M30 (subprogram end) are output to the PLC.

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

H2: Auxiliary function outputs to PLC

8.16 Supplementary conditions

Sinumerik 840d sl