Siemens SINUMERIK 840C - Manual (Page 426)

12.93 7 Drive Machine Data (SIMODRIVE Drive MD)
7.1.2 MSD MD (data description - SW 3)
Shift factor DAC2 73
Default value Lower input limit Upper input limit Units
0 0 15 –
Active
at once
Note:
This machine data is not included in the machine data lists. The DACs are configured in the
course of the drive servo start-up procedure for diagnostic purposes.
Input of shift factor DAC2 for analog output. The top 8 bits from a 16-bit wide memory location
are output. This machine data specifies how often the value must be shifted to the left
beforehand. A shift by one position corresponds to a multiplication by 2, i.e. the shift factor
allows multiplication by the power of two 2
shift factor . The maximum gain which can be obtained
in this way is 32768 (only the last bit is evaluated).
Offset DAC2 74
Default value Lower input limit Upper input limit Units
0000 FF80 007F Hex
Active
at once
Note:
This machine data is not included in the machine data lists. The DACs are configured in the
course of the drive servo start-up procedure for diagnostic purposes.
Input of an offset value for DAC2 which is added to the value prior to analog output.
Address DAC1 76
Default value Lower input limit Upper input limit Units
3044 0000 FFFF Hex
Active
at once
Note:
This machine data is not included in the machine data lists. The DACs are configured in the
course of the drive servo start-up procedure for diagnostic purposes.
Input of memory address of which the contents must be output.
3044 H: Speed actual value n
act
Shift factor DAC1 77
Default value Lower input limit Upper input limit Units
0 0 15 –
Active
at once
Note:
This machine data is not included in the machine data lists. The DACs are configured in the
course of the drive servo start-up procedure for diagnostic purposes.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 7–11
SINUMERIK 840C (IA)