S1: Spindles
16.2 Operating modes
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
1259
• If the speed drops below the minimum speed
or when NC/PLC IS:
DB31, ... DBX61.4 (axis/spindle stationary)
is detected, NC/PLC IS:
DB31, ... DBX83.5 (nact = nset)
is reset (e.g. for an emergency machine strategy).
• A path operation which has started (G64, rounding), is not interrupted.
In addition, the spindle response is influenced by the following machine data:
MD35500 $MA_SPIND_ON_SPEED_AT_IPO_START (feed enable with spindle in setpoint range).
Spindle behavior at the end of gear stage change
• NC/PLC IS:
DB31, ... DBX16.3 (Gear changed)
tells the NC that the new gear stage
(NC/PLC IS DB31, ... DBX16.0-16.2 (Actual gear stage A to C))
applies and oscillation mode is terminated.
In this case, it does not matter whether NC/PLC IS:
DB31, ... DBX18.5 (oscillation mode)
is still set.
The actual gear stage should correspond to the set gear stage.
The actual gear stage signaled is relevant for selection of the parameter set.
• Once the gear stage change (GSW) has been acknowledged via the PLC (DB31, ... DBX16.3), the spindle is
in speed control mode (DB31, ... DBX84.7 = 1).
If a direction of rotation (M3, M4, M5 or FC18: "Start spindle rotation") or a spindle speed (S value) was
programmed before the gear stage change, then the last speed and direction of rotation will be reactivated
after the gear stage change.
16.2.4 Oscillation mode
Oscillation mode is activated for the spindle during the gear step change.
The mode of operation is described in detail in the topic "Gear step change with oscillation mode [Page 1308]".
16.2.5 Positioning mode
16.2.5.1 General functionality
When is positioning mode used?
The spindle positioning mode stops the spindle at the defined position and activates the position control, which
remains active until it is de-activated.
For the following functions the spindle is in positioning mode:
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