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Manual – MOVIDRIVE® MDX61B MOVI-PLC® DHP11B Control Card
45
6
Introduction to PROFIBUS DP-V1
DP-V1 Functions
6
DP-V1 Functions
6.1
Introduction to PROFIBUS DP-V1
This section describes the functions and terms used for operating the DHP11B control
card 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 within
the context of the PROFIBUS DP-V1 expansions. These acyclical services are inserted
in special telegrams during ongoing cyclical bus operation to ensure compatibility be-
tween PROFIBUS DP (version 0) and PROFIBUS DP-V1 (version 1).
The acyclical
read/write
services can be used to exchange larger volumes of data be-
tween master and slave (DHP11B control card) 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
®
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 informa-
tion in the folder ...\SEW\...
The main features of PROFIBUS DP-V1 are shown in the figure below.
20068AXX
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