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6
PROFIBUS-DP-V1 Functions
Introduction to PROFIBUS-DP-V1
58
Manual – MOVI-PLC
®
basic DHP11B.. controller
6
PROFIBUS-DP-V1 Functions
6.1
Introduction to PROFIBUS-DP-V1
This section describes the functions and terms used for operating the MOVI-PLC
®
basic
DHP11B.. controller on PROFIBUS-DP-V1. Refer to the PROFIBUS user organization
or visit www.profibus.com for detailed technical information on PROFIBUS-DP-V1.
The PROFIBUS-DP-V1 specification introduced new acyclical
read / write
services as
part of the PROFIBUS-DP expansions. These acyclical services are inserted in special
telegrams during cyclical bus operation to ensure compatibility between PROFIBUS-DP
(version 0) and PROFIBUS-DP-V1 (version 1).
The acyclical read/write services can be used to exchange larger volumes of data
between master and slave (MOVI-PLC
®
basic
DHP11B..) than it would be possible to
transfer with the cyclical input or output data via the 8 byte parameter channel. The
advantage of the acyclical data exchange via DP-V1 is the minimum load on the cyclical
bus operation. DP-V1 telegrams are only added to the bus cycle if required.
The DP-V1 parameter channel offers the following options:
• The higher-level controller can access all the device information of the SEW DP-V1
slaves. This means that cyclical process data and unit settings can be read, stored
in the higher-level controller and modified in the slave.
• It is also possible to route the MOVITOOLS
®
MotionStudio service and startup tool
via the DP-V1 parameter channel instead of using a proprietary RS485 connection.
Once you have installed the MOVITOOLS
®
MotionStudio software, you can access
detailed information in the folder ...\SEW\Movitools\Fieldbus.
The main features of PROFIBUS-DP-V1 are shown in the figure below.
58378axx
Acyclic DP1-V1
C1-Services
C1-Master
C2-Master
C2-Master
PROFIBUS DP-V1
Acyclic DP1-V1
C2-Services
Acyclic DP1-V1
C2-Services
PD
PD
Param
Param
Cyclic OUT Data
MOVI-PLC
®
0
0
I
Содержание MOVI-PLC basic DHP11B-T0
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