Glossary-6
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
The target range is located symmetrically about the target. Within the target
range the drive must reach the standstill speed, so that the signal “Position
reached” is set.
After reaching the switch-off point, the drive switches off. It then runs in -
starting from the creep speed - to the target.
On ending or interrupting an operating mode the drive is terminated. Ter-
mination means that the drive is switched off via the creep speed.
The traverse range is a range in a system of units which is limited by the res-
olution of a number representation or by the range covered by an absolute
encoder.
The traverse range monitoring is activated when the actual value becomes
located outside of the traverse range or the range covered by the absolute
encoder.
The type of control determines the function of the digital outputs on the
FM 351. The FM 351 has 4 types of control.
The single command “Undo set actual value” sets the system of units back in
the original state.
The working range is the range between the parameterized software limit
switches which have been defined in the machine data. The working range is
always smaller than the traversing range.
The zero mark supplies a zero-mark signal after each revolution.
The zero-mark signal is output from an incremental encoder after each revo-
lution.
Target Range
Target Approach
Termination
Traverse Range
Traverse Range
Monitoring
Type of Control
Undo Set Actual
Value
Working Range
Zero Mark
Zero-Mark Signal
Glossary
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