9-1
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
Operating Modes and Settings
The task of an FM 351 is the positioning of a drive at certain specified tar-
gets.
For these tasks the FM 351 has the following operating modes available:
Jogging
The drive is driven for the duration of the key depression.
Incremental
– Relative: The axis is traversed over a specified displacement.
– Absolute: The axis is moved to an absolute target.
Seek-reference-point
The axis is synchronized.
Calling an operating mode is only possible with a parameterized channel.
Apart from the positioning of the drives using the operating modes, the
FM 351 offers you settings. With these settings you have the possibility of:
Synchronizing the axis.
Displacing the coordinate system with the physical working range re-
maining the same.
The settings are executed once after calling. The effect is then retained after
the call.
For example, a coordinate system remains in the displaced state after Set
actual value until you set a further displacement or reset the displacement
with a command.
Calling a setting is only possible with a parameterized channel.
With single settings you switch the FM 351 into a state in which you:
Can define from which direction a target position is to be approached.
Can position the drive independent of the enable input.
Single settings remain switched on until you terminate them with an FC call
or by a call from the parameterization interface.
Operating Modes
Settings
Single Setting
9
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