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Siemens SINUMERIK 828D Function Manual

Siemens SINUMERIK 828D
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A2: Various NC/PLC interface signals and functions
1.2 NC/PLC interface signals
Basic Functions
44 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Figure 1-3 Trajectory for clamping and "follow-up"
Drives with analog setpoint interface
A drive with an analog setpoint interface is capable of traversing the machine axis with an external setpoint. If
"follow-up mode" is set for the machine axis, the actual position continues to be acquired. Once follow-up mode
has been cancelled, homing is not required.
The following procedure is recommended:
1. Activate follow-up mode:
DB31, ... DBX2.1 = 0 (controller enable)
DB31, ... DBX1.4 = 1 (follow-up mode) (in the same or preceding OB1 cycle)
The axis/spindle is operating in followup mode
2. Deactivate external controller enable and external speed setpoint
Axis/spindle moves with external setpoint
NC continues to detect the actual position and corrects the setpoint position to the actual position
3. Deactivate external controller enable and cancel external speed setpoint
Axis/spindle stops
4. Canceling followup mode
DB31, ... DBX2.1 = 1 (controller enable)
DB31, ... DBX1.4 = 0 (follow-up mode)
NC synchronizes to current actual position. The next traversing movement begins at this position.
Note
"Followup mode" does not have to be canceled because it only has an effect in
combination with "controller enable".
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Siemens SINUMERIK 828D Specifications

General IconGeneral
Control TypeCNC
Operating SystemWindows Embedded
ProcessorIntel Atom
Display10.4" color TFT display
InterfacesEthernet, USB
ProgrammingShopMill, ShopTurn
Operation Panel Size10.4"
Protection ClassIP65
PLC Memory2 MB
Spindle Capacity4 spindles
Hard DriveCompactFlash

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