Siemens SINUMERIK 840D sl Programming Manual page 656

Glossary
Interrupts
All alarms and -> messages are output on the operator panel in plain text with the date and
time and a symbol indicating the cancel criterion. The display is divided into alarms and
messages.
1. Alarms and messages in the part program:
2. Alarms and messages from PLC
Inverse time feedrate
With SINUMERIK 840D, the time required for the path of a block to be traversed can be
programmed for the axis motion instead of the feed velocity (G93).
Jog
Control operating mode (setup mode): In JOG mode, it is possible to set up the machine.
Individual axes and spindles can be moved in this mode using the direction keys. Other
functions available in JOG mode are -> reference point approach, -> repositioning and ->
preset (setting an actual value).
Key switch
The key switch on the → machine control panel has 4 positions that are assigned functions
by the operating system of the control. The key switch has three different colored keys that
can be removed in the specified positions.
Keywords
Words with specified notation that have a defined meaning in the programming language for
→ part programs.
Kv
Servo gain factor, a control variable in a control loop.
Leadscrew error compensation
Compensation for the mechanical inaccuracies of a leadscrew participating in the feed. The
control uses stored deviation values for the compensation.
Limit speed
Maximum/minimum (spindle) speed: The maximum speed of a spindle may be limited by
values defined in the machine data, the -> PLC or -> setting data.
Glossary-10
Alarms and messages can be displayed in plain text directly from the part program.
Alarms and messages for the machine can be displayed in plain text from the PLC
program. No additional function block packages are required to do this.
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
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