How do I link?
"How to link" is described in detail in the wireless Access Configuring and Operating
Instruction manual: Configuring
and Operating Instructions (PDF, left click to view, right click and select
"Save target as..." to download)
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Do I need to re-link when I change a WAPM's batteries or power fails?
Each WAPM retains it's linking information in non-volatile memory (i.e. the information stored in the memory will be retained when power is removed and restored). When a WAPM is re-powered (as in batteries being replaced or power restored) and it does not find a PIM in the link mode, it will continue to communicate with the PIM to which it
was last linked, therefore re-linking is not required.
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How long does a PIM stay in the “Link Mode?"
A PIM stays in the link mode until it successfully links to a WAPM or 30 minutes elapse, whichever occurs first.
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Why can I only link one WAPM at a time?
In one RF coverage area, only one WAPM can be linked at a time because only one PIM can be in the link mode at the same time. If more than one PIM is in the link mode at the same time, it is possible for a WAPM to link to the wrong PIM and produce unexpected and unwanted results.
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Can I link more than one WAPM to one side of a PIM?
You can link as many WAPMs to one side of a PIM as you want, but beware of the following
conditions/restrictions:
- all events will be reported as occurring at the same access point, in other words, you will not be able to tell which WAPM
was actually used.
- none of the WAPM's can use a door position switch or forced doors may occur.
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What do I do if the link process is unsucessful?
If the link process between a PIM and WAPM do one of the following (in order) and then trying re-linking:
- change the PIM's RF channel number
- re-locate the PIM
- re-locate the WAPM if possible.
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What happens during linking?
During the linking process, the WAPM transmits a linking request on all 15 RF channels looking for a PIM that is in the linking mode. If the WAPM gets a response from a PIM to its linking request, the WAPM and PIM then engage in an error packet analysis on that RF channel. This analysis takes about 20 seconds. At the end of this analysis, if the WAPM and PIM determine that this RF channel is reliable, then the PIM sends the WAPM a unique address and tells the WAPM to use this address and RF channel for all future communication. If the analysis determines that this RF channel is not reliable, then the WAPM continues to transmit a linking request on all 15 RF channels until it has tried all 15 channels three times. If the WAPM does not link to a PIM, it then proceeds to use the address and RF channel that it obtained when it
was last successfully linked.
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When should I re-link?
You must re-link a PIM and WAPM if:
- the PIM's RF channel number has been changed
- the PIM's firmware has been changed/updated
- the PIM's address has been changed
- the WAPM has been replaced
- the PIM and WAPM are not communicating properly
- the WAPM or PIM's mounting location have changed (this does not apply to the WPR)
- the WAPM or PIM's antenna has been replaced or changed
- the obstructions in the RF path between the WAPM and PIM have changed (i.e. new structure, remodeling, redecorating, etc.)
- the PIM and WAPM never successfully linked
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