Walchem WebMaster User manual

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WebMaster or WebAlert Wireless Connection to Local Area
Network
Need to connect to the local area network (LAN) but no LAN jack within 100
meters?
If you cannot make a direct Ethernet connection to the LAN because the distance from
the controller to the nearest LAN connection is beyond the 100 meters maximum, we
have a solution.
1) Establish a connection from the WM or WA to a plant's LAN / wireless access point,
or
2) Establish a connection from a WM or WA to a LAN jack.
The first solution requires the WM or WA to plug into a wireless Ethernet bridge using a
straight-through Ethernet cable, and then the wireless Ethernet bridge connects to the
plants’ wireless access point. One wireless Ethernet bridge is required here.
The second solution requires the WM or WA to plug into a wireless Ethernet bridge
using a straight-through Ethernet cable, and then the wireless Ethernet bridge connects to
a second wireless Ethernet bridge that is plugged into a LAN jack. Two wireless
Ethernet bridges are required here.
Wireless
Ethernet Bridge
Wireless
Access Point
LAN
Wireless
Ethernet Bridge
Wireless
Ethernet Bridge
LAN

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What hardware do I need?
Wireless Ethernet Bridge(s)
The wireless Ethernet bridge you choose will mainly depend on the distance/line-of-sight
between the bridge and the wireless access point, or the second bridge. A second
consideration may be the physical environment where this device will reside. The bridge
manufacturer will be your source for selection, instructions, and commissioning of the
wireless Ethernet bridge. This is done independently from configuring the WM or the
WA. The wireless Ethernet bridge must be verified operational before connecting to the
WM or the WA. Either the bridge is verified connected to a wireless access point, or it
is verified connected to a second bridge, prior to actually physically connecting to a WM
or WA.
What Do I Need to Configure In My WebMaster Controller?
1. Consult with the plant IT people to determine the if the following addresses will
be provided by them, or, if you can enable DHCP in the WM or WA and have the
controller source these addresses:
a. Ethernet IP address
b. Ethernet IP Netmask address
c. Default Gateway address
2. Once the above addresses have been determined, log into your WebMaster via
USB. Go to the Communications page. Under Ethernet (LAN), input said
addresses, or enable DHCP. Cycle power to the WM or WA.
3. In accordance with the wireless Ethernet bridge manufacturer’s instruction, install
and commission the wireless Ethernet device and verify it is operational. Do not
attempt to connect the bridge to the WM or WA until the bridge connection to the
wireless access point, or connection to a second wireless bridge, has been
established and verified.
4. Power down the WM or WA, and power down the wireless Ethernet bridge.
Using an Ethernet cable, connect the WM or WA to the wireless Ethernet bridge.
Power up the wireless Ethernet bridge, and then power up the WM or WA.
5. Open the browser on any computer with LAN access and type in Ethernet IP
address of the WM or WA.
6. Login to your WebMaster or WebAlert!