04.96 7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
Value display monitor
1657
Default value Lower output limit Upper output limit Units
0000 0000 0000 0000 FFFF FFFF Hex
Active
at once
Output of monitoring function display value. This machine data displays the content of the
address resulting from the segment (MD 1655) and the offset (MD 1656).
Value input monitor
1658
Default value Lower input limit Upper input limit Units
0000 0000 0000 0000 FFFF FFFF Hex
Active
at once
A 24-bit value can be entered in this machine data. The value is written in the monitoring
function to the address specified by the segment (MD 1655) and the offset (MD 1656). The
value is not written until machine data "Value acceptance monitor" (MD 1659) has been set
to 1.
Caution:
This machine data is relevant only for Siemens-internal purposes and must not be altered.
Value acceptance monitor
1659
Default value Lower input limit Upper input limit Units
0 0 1 –
Active
at once
This machine data writes the value (MD 1658) to the addressed memory location (MD 1655,
MD 1656) if the value "1" has been entered to initiate the write operation. On completion of
the write operation, the machine data is automatically reset to "0".
Caution:
This machine data is relevant only for Siemens-internal purposes and must not be altered.
Motor frequency V/f mode (SW 4.4 only)
1660
Default value Lower input limit Upper input limit Units
1.0 -10000.0 10000.0 Hz
Active
at once
Input of a setpoint frequency (electrical) for the drive in voltage-controlled V/f mode. The +
or – sign corresponds to the appropriate direction of rotation of the motor.
Note:
• This machine data is only used for diagnostics and may only be used or applied by trained
service personnel.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 7–153
SINUMERIK 840C (IA)