CHAPTER 35
Network connection
405.1200.037.2 - Rel.: 2.21 of 25/02/2008
35-6
Profibus-DP
(ESA profile):
Physical
diagram
The following figure represents the physical form of the
VT <-> Profibus-DP connection.
Profibus-DP
(Standard): VT
operation
The slave VTs are seen generally as dedicated areas of memory in the
PLC’s I/O area, or alternatively in other data areas made accessible by the
configurator of the master, which are used by the PLC and VT to exchange
data. The size of the I/O area of each VT participating in the network is
defined by the user with a 4 to 64 word limit (8-128byte).
Profibus-DP
(Standard):
Configuration
software
There are 3 types of software that play a part in configuring the network:
• VTWIN
• File with extension GSD
• Configuration software for network master
These types of software require parameters that coincide.
VTWIN:
The parameters that must be set in the VTWIN project of every ter-
minal connected in the network are:
• Size (in words of the I/O area)
• Timeout for testing the connection between the VT and PLC.
• Address of terminal.
File with extension GSD (dedicated to Standard profile):
This file is supplied by ESA; it allows the configuration software of
the network master to recognize the VT.
VT with native Profibus-DP
VT
✳✳✳✳
✳✳✳
DP
Profibus-DP
Master
ESA module
Profibus-DP
VT170W and VT190W with inte-
grated Profibus-DP module
All VTs
Содержание VT130W
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