Product manual

Installation
40 025-9158L
• Designated Stations = this is basically the number of stations to be polled during
a given polling cycle, it is set with the Stations per Poll Time
parameter
This parameter sets the time between polling cycles. It works in conjunction with the
Stations Per Poll Time parameter (discussed in the following sub-section) to control the
polling speed of the Model 26. It can have a minimum value of zero (0) and a maximum
value of 9:59:59.99 (9 hours, 59 minutes, 59 seconds and 990 milliseconds).
In wire line communications mode, the Model 6s can only communicate a change of state
after being polled by the Model 26. It is therefore desirable to poll as often as possible in
the wire line mode. In all other communication modes the Model 6 may transmit a
change of state as soon as it occurs, without waiting on a Model 26 poll. The primary
purpose in having the Model 26 poll, when not in wire line mode, is to verify the
communications link between the Model 6 and Model 26 and to verify that the Model 6 is
still operational. This is usually the primary consideration when choosing a value for this
parameter.
The Poll Cycle controlled by this parameter can be interrupted, and thereby have its final
duration extended by Status changes and Alerts. However, the process to establish a PA
Ready condition after an Alerts with PA message is sent is a non-configurable internal
process that does a “fast poll” to determine when the Alert tones in the Model 6 have
finished. Because this “fast Poll” process is suspended during the Poll Cycle, it is
important to note that PA Ready polling can only occur during the interval between poll
cycles and therefore may have an adverse effect on the time it takes to obtain a PA Ready
condition.
Note
If a poll cycle has started, all stations will be polled before the M26
starts checking the status of alerted stations. Even though the
actual alert time will NOT change, longer than expected delays in
“PA Ready” are possible, especially with a longer key-up delay
setting.
To minimize “PA Ready” latency during a poll cycle, we
recommend that the “Stations Per Poll Time” be set to 1, and the
“Poll Time” be set to time required to compete a full poll cycle
divided by the number of M6 stations. For example:
Poll Time - 0:06:00.00 (Hr:Min:Sec:Hun) Ö (6 minutes are set)
Stations Per Poll - 1 (0 = All) Ö (one station per poll)
This example shows settings that allow 10 stations to be Polled
within a one hour interval at a rate of one station every 6 minutes.
With a 1 second key-up delay time programmed, the "PA Ready"
latency, due to a poll cycle, will only be 2 seconds longer during
the poll cycle (i.e. two seconds per station polled longer).