Omron WE70-AP, Operation Manual

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Chapter 1. Overview
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Overview
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Transmission power switching function
This wireless unit set can configure 3 levels of radio field intensity for transmission.This allows easier
installation of multiple wireless systems in one production site.Configuring the best transmission power for
an installed system should minimize influence on other systems.
Assuming high wireless transmission power as 1.0, middle and low transmission power can be indicated
as 0.5 and 0.25 respectively.
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Wireless communication distance
Wireless communication distance depends on installation environment and communication frequency.
Use followings as guidelines.
• IEEE802.11a
54Mbps communication: ca. 40m (indoors: Clear view)
• IEEE802.11b/g
54Mbps (2.4GHz) communication: ca. 60m (indoors: Clear view)
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Receiving electric field strength monitoring function
RSSI (Receive Signal Strength Indicator) on CL shows a radio status.
A radio communication status is displayed on LEDs on the unit.
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Multiple sets of units installation is available in one zone
Using different channels (frequencies) in one zone prevents interference.
Up to 3 and 24 systems can be configured for 2.4GHz and 5GHz bands respectively.
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Noise-resistance in FA sites
Noise resistance is the same level as that for installation in control panel of Omron's FA
equipment.(Equivalent to PLC)
The power supply is typical 24VDC in FA sites.Moreover, it is resistant against instantaneous power
interruption in the same level as FA equipment, allowing stable operation under continuous motion.
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Optionally magnetic-base antenna can be provided.
Magnet allows easy installation of an antenna on a metallic part of a control panel
You can install a wireless unit set inside a control panel while its antenna outside the control panel.
Magnetic-base antenna contributes to cost reduction for installation.
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Easy installation & setup
This wireless unit can be easily installed on a DIN rail.
(DIN rail mounting bracket: For options (WT30-FT001/FT002))
Setting is conducted in a web browser on your PC.
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Smart roaming
When a radio wave status of current access point gets worse due to movement or relocation of WE70-CL
(slave), communication can be made through other access point (WE70-AP) with better radio wave
status.
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DFS (Dynamic Frequency Selection)
As some channels (52CH - 64CH, 100CH-140CH) have been already used by air traffic control radars
and weather radars, a mechanism (DFS) is necessary to detect the radars.
When one of these channel is set, DFS scans radio waves for 1 minute after power-on of an access point
and allows use of the channel only if it is not used.
If radio waves of an air traffic control radar or a weather radar is detected while wireless LAN is under
operation, use of the channel is stopped within 10 seconds and switched to other channel.