Moore Industries WLM, Руководство по установке

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The Interface Solution Experts 27
WLM
Troubleshooting
“I have two radio modems, one configured as a master and the other as a remote. When they are
plugged in, the LEDs indicate they are receiving power, and yet they will not connect. Why not?”
There are several reasons why this may occur:
1. The radio modems are running at full power and are too close to each other. If the radio modems are
within 5-10 feet of each other and will not link try either reducing the RF power to 0 on each or moving
one unit to another room. (This problem occurred on the initial generation of product with the 555-call
book number prefix. It has been addressed in radio modems with call book numbers 556 and higher.)
2. The radio modems are not in each other’s Call Books.
3. The number of the remote is in the master’s Call Book, but the master’s menu is not set to call that
number.
4. The master is set to Call All and a setting of 000-0000 precedes the phone number of the radio modem
with which you are trying to communicate.
“I am able to link to a remote unit within line of sight when the WLM I have is outside. However, as soon
as I walk inside with it I lose the link, even if I place the radio modem by the window which faces the
remote unit.”
Many modern buildings use energy efficient glass that wreaks havoc on RF signals. This glass contains a metal film
that is very effective in blocking all radio waves. If your situation is as described above the preferable solution is to
install an antenna outdoors.
“I have several radio modems set up to communicate with each other in a point-to-multi-point mode, yet
they are not establishing contact.”
In a multi-point system there are two critical parameters, which must be set correctly to establish a communications
link:
1. The remote’s Call Book must contain the call book number or Network ID of the master and/or repeaters to
which it will be communicating.
2. All radios must be set to run at the same RF data rate. Remote modems must match the Masters RF data
rate.
“In bench testing several units in a multi-point system, it appears that they are not communicating
through the multi-point repeater. When all units are powered the remotes’ Carrier Detect lights are on,
indicating a connection, yet when I unplug the repeater those remotes set up to communicate through
that repeater remain connected.”
In a multi-point system a remote will attempt to communicate with any master or repeater (which looks like a master
in a multi-point system) that is in its Call Book. Therefore, it may be that the remotes are communicating with the
repeater when it is powered, and when it is unplugged they are establishing a link with the master. To test whether or
not this is what is occurring go into the Call Book of the remotes which are set up to communicate through the
repeater and remove the master’s call book number. When all units are powered the remotes’ Carrier Detect lights
should be green, when the repeater is unplugged the remotes should lose contact and Carrier Detect should turn off.