Communications Options User’s Guide
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Chapter 5. Modbus Over WI-FI Communications
5.4 Tips for Improving Wireless Data Communications
A suitable installation site should locate the antenna in a transmission path as unobstructed as possible; in the
direction of the associated router.
When a wireless transducer is linked to a router, a yellow LED on the WI-FI option board remains on. Received Signal
Strength Indication (RSSI) is an important indicator of wireless link quality. The higher the RSSI, the stronger the
performance a wireless system can provide. Signal Strength is calculated by a wireless transceiver and can be
viewed on Administration-System Information - WI-FI LAN - Active Settings of the device home page (see Figure 37
on page 56).
If constant interference is present in a particular frequency zone, it might be necessary to change the operational
channel in the WI-FI network. If interference problems persist, try reducing the length of data streams by reading less
registers in one request. Groups of short data streams have a better chance of getting through in the presence of
interference than do long streams.
Figure 36: Installation Site
