Function
generator
09.95
Siemens AG 2001 All Rights Reserved 6FC5197–jAA50 9–23
SINUMERIK 840C (IA)
9.3 Function generator (axis and spindle – as from SW 3)
You can select the function generator with this softkey.
Note Axes and spindles can be traversed with the function generator in both analog
and digital drives.
Explanation The function generator can operate in the following five different modes:
Current setpoint (SW 3: 611D FDD/SW 4: 611D)
Disturbing torque (SW 3: 611D FDD/SW 4: 611D)
Speed setpoint speed loop (speed controller
SW 3: 611D FDD/SW 4: 611D)
Speed setpoint position loop (position controller)
Position setpoint
The signal types square-wave, noise signal, sawtooth and staircase function
can be used within the framework of these operating modes.
The following applies to the upper and lower traversing range limits:
The specified limit values define the permissible traversing range during start-up.
In the case of a referenced axis/positioned spindle, the limit refers to the
axis/spindle position at the start of the test movement and, with a non-referenced
axis/non-positioned spindle, to the axis/spindle position at the start of the first
movement after the machine is switched on.
The current axis/spindle position is displayed in the position actual value/absolute
position field.
The scaling can also be altered when the function generator is in operation. This
is done by entering the normalization factor and confirming the input with the
Start softkey bar. When a normalization value of 100 is entered, the function
generator generates precisely the amplitude set by the signal parameters. The
value can be varied to obtain a fine setting.
Overview of operating The type of drive used determines which operating modes are available. Various
modes signal forms are available depending on the selected operating mode.
Operating
mode Signal type
“Squarewave” Signal type
“Sawtooth” Signal type
“Staircase” Signal type
“Noise signal”
Current
setpoint 611D – – 611D
Disturbing
torque 611D –– 611D
Speed setpoint
(speed control-
ler cycle)
611D – – 611D
Speed setpoint
(position con-
troller cycle)
analog/611D analog/611D analog/611D analog/611D
Position
setpoint analog/611D analog/611D analog/611D analog/611D
Note If combinations other than those specified above are selected, the dialog boxes
160008 Mode/drive type combination not allowed or
160009 Mode/signal type combination not allowed appear when the Start soft-
key is selected.
9 Drive Servo Start-Up Application (as from SW 3)
9.3 Function generator (axis and spindle – as from SW 3)
10.94