Siemens SINUMERIK 840C Installation Instructions Manual page 568

04.96
1657
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).
1658
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.
1659
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.
1660
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.
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Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
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Default value Lower output limit
0000 0000 0000 0000
Default value Lower input limit
0000 0000 0000 0000
Default value Lower input limit
0
Motor frequency V/f mode (SW 4.4 only)
Default value Lower input limit
1.0 -10000.0
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7 Drive Machine Data (SIMODRIVE Drive MD)
Value display monitor
Upper output limit
FFFF FFFF
Value input monitor
Upper input limit
FFFF FFFF
Value acceptance monitor
Upper input limit
0 1
Upper input limit
10000.0
6FC5197- AA50
7.3.2 Drive MD (data description)
Active
at once
Units
Hex
Active
at once
Units
Hex
Active
at once
Units
–
Active
at once
Units
Hz
7–153