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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
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
45
Canceling followup mode
Once follow-up mode has been canceled, the machine axis does not have to be homed again if the maximum
permissible encoder limit frequency of the active measuring system was not exceeded during follow-up mode. If
the encoder limit frequency is exceeded, the controller will detect this:
DB31, ... DBX60.4 / 60.5 = 0 (homed/synchronized 1 / 2)
Alarm: "21610 Encoder frequency exceeded"
Monitoring
If a machine axis is in follow-up mode, the following monitoring mechanisms will not act:
Zero-speed monitoring
Clamping monitoring
Positioning monitoring
Effects on other interface signals:
DB31, ... DBX60.7 = 0 (position reached with exact stop fine)
DB31, ... DBX60.6 = 0 (position reached with exact stop coarse)
DB31, ... DBX1.5 / 1.6 (position measuring system 1 / 2)
2 measuring systems can be connected to one machine axis, e.g.
Indirect motor measuring system
Direct measuring system on load
Only one measuring system can be active at any one time. All closed-loop control, positioning operations, etc.
involving the machine axis always relate to the active measuring system.
Figure 1-4 Position measuring systems 1 and 2
Note
If "follow-up mode" is deactivated for a machine axis, which is part of an active
transformation (e.g. TRANSMIT), this can generate movements as part of repositioning
(REPOS) other machine axes involved in the transformation.
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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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