Function Manual
01/2017
15
● As soon as the actual speed has reached the zero speed range, the drive controller enable is removed. Checkback
signal to PLC with IS "Speed controller active" (DB390x.DBX1.6) = 0 state. The drive enable of the drive is removed at
the latest after the time set in MD36620 SERVO_DISABLE_DELAY_TIME has expired.
● Notice: If the setting for the drive enable shutdown delay is too small the drive enable will be removed even though the
axis/spindle is still moving. The axis/spindle is then stopped abruptly with setpoint 0.
● The actual position value of the axis/spindle continues to be acquired by the control.
This axis/spindle state cannot be changed until after "Reset".
Interpolatory axis grouping:
All the axes traversing within the interpolatory axis grouping are stopped as soon as the drive enable signal is cancelled for
of the axes.
The axes are brought to a standstill as described above. All axes in the geometry grouping are brought to a standstill with
rapid stop. Alarm 21612 "Controller enable reset during movement" is also triggered. Continued processing of the NC
program after this event is no longer possible.
Signals for digital drives, to axis/spindle
Speed controller integrator disabled (DB380x.DBX4001.6)
The PLC user program inhibits the integrator of the speed controller for the drive. The speed controller is thus switched from
PI to P controller.
Pulse enable (DB380x.DBX4001.7)
The PLC user program enables the pulses for the axis/spindle. However, the pulse enable is only activated for the drive
module if all the enable signals are present.
Signals from NCK to PLC
3.3.1
General signals
Drives in cyclic operation (DB2700.DBX2.5)
The PLC is signaled via the NCK by means of a cyclical exchange of data that the available drives have reached ramp-up
status.
Drive ready (DB2700.DBX2.6)
The PLC is signaled via NCK that all available drives are ready to operate. IS "Drive Ready" (group signal) is active on all
axes and spindles.
NCK alarm is active (DB2700.DBX3.0)
The control sends this signal to the PLC to indicate that at least one NCK alarm is active. An enquiry can be made via the
channel-specific interface (DB3300.DBX4.7) as to whether a processing stop has been triggered.
Ambient temperature alarm (DB2700.DBX3.6)
The ambient temperature or fan monitoring function has responded.
NCK alarm channel-specific active (DB3300.DBX4.6)
The control system sends this signal to the PLC to indicate that at least one NCK alarm is active for the channel. To what
extent this may influence whether the current program run will be interrupted or aborted can be determined from IS "NCK
alarm with processing stop is active" (DB3300.DBX4.7).
External language mode active (DB3300.DBX4001.0)
The control system sends this signal to the PLC to indicate that the active program language used for the part program is not
a SIEMENS language. A language changeover has been made with G291.
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