Siemens SINUMERIK 840Di Manual page 227

06.03
Unipolar spindle
Shutdown ramp
Shutdown
delay time
Tolerable
sign-of-life failures
Reserved bits for
fine resolution
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
With radio button "Unipolar spindle" the voltage range of the analog output volt-
age is switched over:
S
Radio button "Unipolar spindle" not selected:
Output voltage: –10V to +10V
S
Radio button "Unipolar spindle" selected:
Output voltage: 0V to +10V
If the function: "Unipolar spindle" of the ADI4 is activated, the direction of
rotation is output through a digital output and depends on the current speed
setpoint:
– Direction of rotation signal for axis 1 –> digital output X6-1, Pin 6
– Direction of rotation signal for axis 2 –> digital output X6-1, Pin 7
– Direction of rotation signal for axis 3 –> digital output X6-1, Pin 8
– Direction of rotation signal for axis 4 –> digital output X6-1, Pin 9.
You can set a linear time function in parameter "Shutdown ramp". When this
time period is exceeded, if an error is detected in ADI4, all drives of ADI4 are
decelerated to setpoint 0.
If you set the parameter to 0, the drives coast to standstill.
S
Unit: [msec]
Max. setpoint
current setpoint
0
Fig. 7-5 Parameter: Shutdown ramp
In the "Shutdown delay time" parameter you can set a time delay after which all
drives of ADI4 are decelerated to setpoint 0 if a temperature alarm occurs.
After the "Shutdown delay time" has elapsed the "Shutdown ramp" parameter is
taken into account.
S
Unit: [sec]
Parameter "Tolerable sign-of-life failures" states the number of tolerable sign-of-
life failures of the DP master. If the parameterized number is exceeded, the set-
point interfaces of all drives are shut down to value 0 using the "Shutdown
ramp".
Via the parameter "Additional substitute bits for fine resolution", you can specify
the desired pulse multiplication of the encoder increments currently read in the
encoder increments and transferred in the encoder actual value G1_XIST1.
7 PROFIBUS DP Communication
7.3 SIMATIC S7 project
Parameter value:
Shutdown ramp
t [msec]
7-227