Instruction manual

Operation
025-9209 13
WARNING
Do NOT enable the Communication Failure feature if you are using a Model
17 or Model 1700 Controller with a software version lower than 3.10. Doing
so can cause permanent loss of communications between the RTU and the
Controller and require a trip into the field to cycle power on the RTU.
Channel Use Limits
Failure of a transducer or other device attached to the inputs of an RTU may cause random
alarm transmissions that tie up the radio channel. The RTU allows you to limit the number of
exception reports (alarms) the RTU transmits within a specified period. If this number is
exceeded, the RTU stays off the channel for a while before resuming alarm transmission.
The period to monitor can be set in the range 1 to 30 minutes. The default value is zero,
which disables this feature. The number of reports allowed during the period can range from
1 to 999 (100 is the default), and the time out interval can be from 1 to 10 minutes (5 minutes
is the default).
During the time out interval, any new alarms that may be detected are buffered (until the
buffer gets full) and are sent when the interval ends.
Enable/Disable Exception Reports
The RTU can be set to poll-only mode by disabling exception reporting (alarms). This is a
global setting that overrides the alarm enables on the individual inputs. This function is
useful for temporarily disabling alarms while debugging an installation.
STORE AND FORWARD
Store and forward (also called “digi-peat” and “packet”) lets an RTU decode the information
from another RTU and retransmit that information. This solves the problem of an RTU out of
radio range of the controller. The RTU can pass its data through one or more RTUs to get to
the Controller. Remember that this will increase the amount of time required for the
transmission.
Table 4. RTU Store and Forward Menu
Menu Selections Range Factory Settings
{S}ource Address 0-65535 0
{D}estination Address 0-65535 0
Replacement S{o}urce Address 0-65535 0
Replacement D{e}stination Address 0-65535 0
{N}ext Slot
E{x}it