Control- And Status-Word Bits For Nck<->Drive Communication; Nck To Drive - Siemens SINUMERIK 840D sl Commissioning Manual
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15.3
Control- and status-word bits for NCK<->drive communication
15.3.1
NCK to drive
Introduction
The NCK transfers data to the drive using message frames via a PROFIBUS interface
(internal PROFIBUS). Setpoints exist for speed control and torque and are preceded by a
control word in the message frame.
PLC interface for STW1
Signal provided by NCK
Axis controllable from NCK:
Servo enable
•
Measuring system selected
•
and OK
Pulse enable
•
...
•
Always "1", "TRUE"
Always "1", "TRUE"
VDI signal pulse enable
RFGIS
RFGIS
(DriveReset) is generated by:
"RESET signal" or CANCEL
•
KEY, if a simultaneous drive
fault is present (ZSW1.bit3 or
ZSW1.bit6)
Selection of NC function
generator (via PI service from
HMI)
Always "0", "FALSE"
Is "1", "TRUE", if the NC can
control the associated drive AND
the drive itself requests that
control (ZSW1.bit9)
Always "0", "FALSE"
"Release holding brake"
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
15.3 Control- and status-word bits for NCK<->drive communication
VDI interface
Remarks
(PLC)
DB(AX).DBX2.1
DB(AX).DBX1.5/6
DB(AX).DBX21.7
No signal
No signal
DB(AX).DBX21.7
DB(AX).DBX20.1
DB(AX).DBX20.1
NCK controlled parallel to
STW1 bit0
No signal
Signal "OFF1" is
automatically set to
FALSE internally,
simultaneously to
"DriveReset" (user must
NOT manipulate the servo
enable separately!).
No signal
The user cannot influence
the function generator
selection via the VDI
interface.
No signal
Signal not used
No signal
No signal
Signal not used
DB(AX).DBX20.5
Fundamentals
Bit in
Meaning
STW1
0
OFF1
1
OFF2
2
OFF3
3
Enable inverter
4
Ramp-function generator
enable
5
Ramp-function generator
Start
6
Setpoint enable
7
Reset fault memory
8
Activate function generator
9
Reserved
10
Control from the PLC
11
Reserved
12
Open holding brake
301
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