PlantLinc
PLR5000 User’s Guide
P/N 161-09888-001
DATA-LINC
Group
15
(5) RF Xmit Power
The PLR5000 offers users the ability to modify the Transmission Power of the radio modem. There are 10
power settings available (1-10) which are roughly linear. Therefore a setting of 10 is full power (or 200 mw)
and 1 is 10% power (or 20 mw). For most application power level should be set to 10.
(6) Remote Security
With option 6 the user may disable the radio modem’s security so it will accept a call from any other
PLR5000. The default setting is 0 where security is enforced (the caller’s call book number must be in the
Remote’s Call Book). With a setting of 1 security is disabled.
As mentioned in mode 6, Remote Security must be set to 1 when the unit is operating in a point-to-point
system where it may need to accept calls from more than 10 different PLR5000s. However, it is important to
note that when Remote Security is set to 1, the radio modem will accept calls from any other PLR5000, and
additional system security measures should be taken to prevent unauthorized access.
(7) RTS to CTS
Menu selection 7 in the Radio Parameters provides the option of allowing the RTS line (pin 7) on the Master
radio modem to control the CTS line (pin 8) of the Remote. This pass-through control can be enabled in
point-to-point mode as well as point-to-multi-point. In the latter, the Master RTS line will control all
Remotes’ CTS lines. When this mode is enabled the CTS line ceases to function as flow control.
To enable this mode, enter 7 in the Radio Parameters menu. An entry of (1) will enable the RTS-CTS control
a (0) will disable it.
(8) Retry Time Out
The Retry Time Out parameter allows the use to determine when a Remote will drop a connection to a Master
or Repeater in multipoint mode. The default setting is 255, therefore, if one packet in 255 from the Master is
sent successfully to the Remote, it will maintain a link. The lowest setting is 8, which allows a Remote to
drop a connection more quickly.
The Retry Time Out parameter is useful when a multipoint system is used with a moving Master or Remotes.
As the link gets weaker, a lower setting will allow a Remote to drop its link and search for a stronger
connection.
While intended primarily for multipoint systems, the Retry Time Out parameter may also be modified in
point-to-point systems. In point-to-point mode the Retry Time Out should not be set to a value of less than
151.
