Danfoss VLT Series Programming Manual page 82

Servo Drive Operation
NOTICE
The digital output must be configured to be used for the
2 2
digital CAM switching functionality by using object
0x2FFF (see chapter 7.21.5 Parameter 52-05: Digital
Output Configuration (0x2FFF)). Otherwise, the activation
of the digital CAM switch has no effect.
This functionality can be commanded via PLC by using
function blocks DD_PrepareDigCamSwitch_ISD51x and
DD_DigitalCamSwitch_ISD51x.
Illustration 2.120 XML Representation of Digital CAM Switches
Each file can only contain 1 DigitalCamSwitch element.
Attribute Mandatory/
optional
(+default value)
version O
Table 2.58 Attributes for DigitalCamSwitch Element
The DigitalCamSwitch element contains the following
optional elements:
•
OnCompensation (see chapter 7.17.1 Parameter: On
Compensation (0x3840)).
•
OffCompensation (see chapter 7.17.2 Parameter: Off
Compensation (0x3841)).
If those elements are present, the parameters are written
to the object dictionary at the point of enabling of the
digital CAM.
When disabling the digital CAM switching functionality, the
values persist (that is, they do not switch back to values,
before the enabling). It is also possible to change those
values during the operation of the digital CAM by writing
80
®
VLT Integrated Servo Drive ISD
Value Description
range/
allowed
values
x.x.x.x Gives the version of
the digital CAM
switches definition.
Danfoss A/S © 01/2017 All rights reserved.
®
510 System
different values to the objects. This does not change the
content of object 0x3844 (see chapter 7.17.5 Parameter:
Digital CAM Switches Data (0x3844)).
Switches is a mandatory element.
Attribute Mandatory/ Value
optional range/
(+default allowed
value) values
Unit M User/
revolutions
Hysteresis M If unit =
User:
integer ≥0
If unit =
Revolutions:
float ≥0
Table 2.59 Attributes for Switches Element
Description
Defines the unit in which
all the position values in
this file are given. Allowed
values are:
•
User: The position
values are given in user-
defined position units.
All numerical values
accept integers only.
•
Revolutions: The
position values are
given in shaft
revolutions (matching
the units that are used
in CAM mode). The
numerical values accept
floats and integers.
See
chapter 7.17.3 Parameter:
Hysteresis (0x3842) for the
description. This parameter
is written to the object
dictionary at the point of
enabling of the digital
CAM. When disabling the
digital CAM switching
functionality, the value
persists (that is, it does not
switch back to value before
the enabling). It is also
possible to change this
value during the operation
of the digital CAM by
writing a different value to
the object. It is not
possible to change the
parameter in the file on-
the-fly. The unit of this
value depends on the Unit
attribute of the Switches
element.
MG36D102