Bosch PIN8 N1 Guía para resolver problemas Pagina 371

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MPH-02, MPB-02, MPD-02 Operating Modes 7-65
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Note: This mode should be used if there is a change in direction in
the case of two consecutive sequential blocks within one
sequential block chain. Otherwise, the position at which the
direction is changed will be inevitably overrun.
Switch-Signal-Dependent Block Advance
For switch-signal-dependent block advance there are the following
positioning modes:
P-0-4019, Positioning block mode = 81h
absolute block with sequential block
P-0-4019, Positioning block mode = 82h
relative block with sequential block
P-0-4019, Positioning block mode = 84h
infinite block in positive direction with sequential block
P-0-4019, Positioning block mode = 88h
infinite block in negative direction with sequential block
Note: Advance to the block with the next higher block number is
triggered by an externally applied switch signal.
The switch-signal-dependent block advance allows transition to a
sequential block, triggered by an external switch signal. As input for this
switch signal there are two sequential block inputs/probe inputs available.
The status of the hardware signals is displayed in parameter P-0-4057,
Positioning block, input linked blocks.
The drive switches to the next travel block n+1 as soon as the input for
the sequential block cam 1 changes from "0" to "1". If the target position
is not reached, switching to the new positioning block is carried out while
traveling.
The drive switches to the travel block after the next one n+2 as soon as
the input for the sequential block cam 2 changes from "0" to "1". If a
sequential block cam is activated during this travel, the drive switches to
the positioning block after the next.
A following relative positioning block refers to the position at which the
sequential block cam was switched.
Note: The sequential block cams are sampled in the position loop
clock (Advanced: T = 250µs, Basic: T = 500µs). The precision
of position detection therefore strongly depends on the velocity
during overrun.
Cam 2 Cam 1 drive reaction
0 0 drive moves to target position of block n
X
0 1
block n+1 is started
0 1
X block n+2 is started
X: not relevant
n: Positioning block selected via the parallel inputs or parameter
P-0-4026, Positioning block selection.
Fig. 7-38: Drive reaction with different switch signal sequences
Switching with Cams
Definition
Reference Position
Assignment Table for Cams
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