Siemens SIMATIC FM 351 Installation Manual page 160

Glossary
Enable Input
The enable input is a digital input per channel on the positioning module. A
positioning process is started and stopped with the enable input.
Encoder Encoders are used for the exact measurement of distances, positions and
speeds.
Evaluate Enable As standard the positioning module evaluates the enable input of the relevant
Input
channel before starting an operating mode. You can switch off this evaluation
with this setting.
Fast Input In contrast to standard input, a fast input has a shorter switch-on delay.
Increment Table
The drive traverses to setpoint values within the working range. These set
points are held in the increment table.
Incremental Incremental encoders measure distances, positions, speeds, revolutions,
Encoder
masses, etc. by counting small increments.
Increments per Increments per encoder revolution indicates the number of increments which
Encoder
an encoder outputs per revolution.
Revolution
Jogging
The "Jogging" operating mode moves the drive in the positive or negative
direction. The operating mode runs while ever the relevant key for this oper-
ating mode is pressed.
Linear Axis
With a linear axis the axis moves between two range limits. Linear axes
therefore have a limited traverse range.
Loop Traverse
The single setting "Loop traverse" determines the direction in which the tar-
get is approached.
Machine Data The positioning module is adapted to the machines with the machine data.
Monitoring
The module continually monitors the connected axis. If a monitored feature
responds, an error signal is output. Monitoring checks the working range,
traversing range, etc.
Monitoring Time
The monitoring time determines in which time period increments from an
encoder must be received.
Glossary-2
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02