Cypress Envirosystems Wireless Range Extender Podręcznik użytkownika - Strona 7
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Drukuj stronęThe power adapter connects to the WRE with a retaining twist lock. Be sure to line up the plug correctly
so it can lock into the WRE. Gently pull on the cord to make sure it stays connected to the WRE.
WREs should be installed with the shortest delays furthest from the server, and longest delays closest to
the server.
WREs should be installed at eye level or above. This reduces the chance of interference from walking
pedestrians or temporarily placed obstacles.
WREs should be securely attached so it can't be moved. Preferably use screws or cable ties, otherwise
Very High Bond (VHB) tape may be used. Cords should be cable tied if possible.
Lastly, ensure that the antennas are screwed in all the way and vertical.
5.0 Operation
There are three different lights on a WRE, indicating the functionality of the two radios on the unit.
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The green light corresponds with the first radio receiving a data packet.
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The yellow light corresponds with the second radio receiving a data packet.
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The red light indicates that the data packet was not received properly by either radio. This is due to
very low signal where the data packet is not understood. The WRE then drops the incomplete data
packet.
WRE Indicator
A field device will send a message on one radio channel at a time. If the field device does not receive an
acknowledgment from the Blue Box Server within a given time frame, it will try to resend the message on
the other radio channel. The flashing green or yellow light indicates that a data packet was properly
received.
A maximum of 4 WREs, each with different delays, can be used to get any one signal from a field device to
the Blue Box Server. However, more than 4 WREs are possible in an installation depending on the layout.
As seen in Figure 5, 8 WREs are used to get various field device data to the Blue Box Server.
On the bottom of each WRE there is a label which denotes the channel set and the delay. The channel set
is a letter corresponding to predetermined set of frequencies in which the radios have been programmed.
The delay is a number between 1 and 4. A delay of 1 indicates the shortest delay and a delay of 4
indicates the longest delay. A label with "A-1" means channel set A with a delay of 1. Notice that in each
path to the Blue Box Server, there are 4 unique WREs.
Cypress Envirosystems
Doc # 152-10202-01 Rev 1.0
Lights
Figure 4. WRE Indicator Lights
WRE User Manual
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