Description Profibus Dp Interface - W.E.S.T. Elektronik POS-124-A-PDP Technical Documentation Manual

7.4 Description Profibus DP interface

The resolution (data via Profibus) of the command position is defined in µm (0,001 mm) independent on
the real sensor resolution.
The scaled speed is defined by 0x3fff (16373) for 100% of the maximum programmed speed.
The module will be controlled by the control word, with the following bits:
ENABLE1 (2): Must be activated in addition to the hardware signal
•
START1 (2): the new command position is taken over by a signal change from low to high (from
•
0 to 1). By deactivation of this bit, the system stops via a programmed deceleration ramp or held
controlled in target position.
HANDA1 (2): Manual mode, speed and direction on internal parameters "HAND1 (2): A". If the
•
velocity is limited by the command velocity, only the maximum command velocity can be used
for movement
HANDB1 (2): Manual mode, speed and direction on internal parameters "HAND1 (2): B". If the
•
velocity is limited by the command velocity, only the maximum command velocity can be used
for movement
GL: Activation of synchronism, synchronization of axis 2 to axis 1.
•
DIRECT: The target position is directly overtaken (not just on the leading edge of the START
•
signal). This bit applies to both axes.
Command values:
Command position1 (2): In positioning mode this is the target position, which is approached
•
with "START".
Command velocity1 (2): 100 % corresponds to 0x3fff. To traverse the axes a default value
•
(even in manual mode) is necessary.
Feedback of the status words and the actual positions:
READY1 (2): System is ready. If the sensor monitoring is enabled, a sensor fault will disable the
•
READY signal.
INPOS1:S (2): In position window. This bit is used for display only (no effect)
•
INPOS1:D (2): Following error window. This bit is used for display only (no effect)
•
GL-ERROR: the synchronization error is displayed dependent on the parameter "GL: E". This
•
bit is used for display only (no effect).
Feedback position1 (2): corresponding to the current position in µm (0.001 mm) of the respec-
•
tive axis.
Page 39 of 45
W.E.ST.
Elektronik GmbH
POS-124-*-PDP-1121 13.02.2013