Emerson Vission 20/20 Operation And Service Manual page 193

Appendix B • Vission 20/20 Application Procedures
Example 4
In Figure B-23, this example shows a hybrid network. An
off campus PC and smartphone is connected to the in-
ternet, running VNC client programs which accesses the
Vission 20/20 panels by specifying an IP address along
with a router port designation. Each Vission 20/20 panel
has an assigned router port. The company router is a
wireless router which is also forms a wired LAN network.
SAMPLE SETUP USING A WIRELESS ROUTER
An example of an Ethernet radio transmitter is a Phoenix
Contact RAD 80211 XDB.
VNC CLIENTS
Smartphone runs VNC client application – connecting to
internet.
Home computer runs VNC client application – connect-
ing to the internet.
The VNC client connects to the "remote site" router
which has an outside accessible IP address. The Vission
20/20 boxes have built-in VNC servers. The Ethernet
ports on the Vission 20/20 panels would be setup for
Modbus TCP protocol. When the connection is made,
Figure B-23. Network Confi guration for Access via Internet – Example 4
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
the VNC client application will ask for password for 20/20
panel access. Password = VVNC.
PLC REMOTE COMPRESSOR CONTROL OF VISSION
20/20
PLC remote compressor control of the Vission 20/20
panel (either via communications or hardwired) is ac-
complished by placing the panel into Remote mode.
Remote Control Mode in the panel refers to two distinct
ways of controlling the compressor.
1. Control via communication port. This can be ac-
complished through:
• Ethernet ( via Ethernet I/P or Modbus TCP/IP )
• Serial (RS485 Modbus RTU )
2. Control via Direct I/O (Digital inputs)
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