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A3: Axis Monitoring, Protection Zones

2.2 Axis monitoring

Basic Functions

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

The function behaves as follows:

• MD36052 $MA_STOP_ON_CLAMPING = 'H03'

No longer has an effect.

The travel command is set in Look Ahead mode only for blocks with active continuouspath mode. M82

generates a stop and thus interrupts the continuouspath mode. The Look Ahead stopping on N410 would not

be necessary because stopping occurs anyway.

• MD36052 $MA_STOP_ON_CLAMPING = 'H04'

Generates a stop irrespective of M83, which is executed as a function of "feedrate override 0%". The axis is

thus stopped before the first machining block.

Block-change criterion: Clamping tolerance

After activation of clamp monitoring:(DB31, ... DBX2.3 = 1) the block-change criterion for traversing blocks, in

which the axis stops at the end of the block, no longer acts as the corresponding exact-stop condition but the

configured clamping tolerance:

MD36050 $MA_CLAMP_POS_TOL (clamping tolerance with interface signal "Clamping active")

Behavior upon releasing of the clamp

If the axis was moved by the clamping process, it is returned by the NC to the position setpoint after releasing of

the clamp and setting of the servo enable state. Repositioning depends on whether "Follow-up mode" was

activated for the axis:

Note

MD36052 $MA_STOP_ON_CLAMPING = 'H01' or 'H04'

Both functions can be used irrespective of the clamping of axes:

• MD36052 $MA_STOP_ON_CLAMPING = 'H01'

Generates a Look Ahead stop for the path motion if no servo enable signal is active for

the relevant axis.

• MD36052 $MA_STOP_ON_CLAMPING = 'H04'

Generates a Look Ahead stop for the path motion if the feed rate overrate = 0% at the

transition from the part-program blocks with rapid traverse to part-program blocks

without rapid traverse.

Both functions ensure that the path motion in continuous-path mode is already stopped

before the start of the relevant part-program block and not just within the part-program

block.

Without follow-up mode: Repositioning by position controller

With follow-up mode: Repositioning by interpolator

Siemens SINUMERIK 828D Function Manual

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