Specifications

5-3
Also note that the controller must be programmed
(under controller sequence menu) for “Lead Lag
Mode” and “Auto” for any pairs to be lagged by CSO.
ADAPATIVE SPLIT CONTROL
Adaptive split control is a means of selecting splits
based on local demand. Adaptive split is enabled by
clock CKT 109, thus, it can be enabled by time of day
or full time (CKT 109 on). The coord “split mode”
would be programmed normally for any of the other
modes (TC, COM, etc.).
There are two modes of adaptive split selection, one is
based on the amount of force offs on selective
phases, the other is based on Queues. Queues are
determined by set-back detectors with delay times. If
the delay times out, a queue count is registered. A
detector is recognized as a queue detector by
assignment to phases under “Q DET” programming in
this section.
SELECTION 3…ADAPTIVE SPLIT CONTROL…
PG DWN…
PG DWN…
PG DWN…
Q DET = detector 1-24
Q DELAY = 0 – 9.9 or 0-127 seconds
PG DWN FOR PHASES 5-8
Adaptive split operation
Each split is assigned a set of selective phases.
These are phases that apply to the selection of that
split. The base period is determined by the sample
number of cycles (starts/ends at cycle zero). The total
number of force off’s or Queues is determined for
each split over the sample number of cycles. For
example, say the force off mode is used, and split 2’s
selective phases are 3 and 7. Now, say that over the
sample number of cycles, 3 forced off once and 7
forced off twice. The total for split 2 would then be 3.
Starting from split 1, the split with the highest total
exceeding the minimum threshold is selected for the
duration of the next sampling period. The LMD will
remain in the selected split until a new split with a
higher number of force offs or Q’s exceeding threshold
occurs. If two splits have the same number of F.O.’s
or Q’s, then the lower numbered split will be selected.
For semi-actuated applications, assign 0’s to split 1
and let other splits be selected based on exceeding
the threshold. The LMD will default to split 1 if not
exceeded in this mode.
If used, queues are based on the Q detector
programming. Each phase is assigned up to 2 Q
detectors (1-24) with delay periods. The delay timer
times down when the detector is active, and sets to full
value when inactive. If the detector is active for the
entire delay period, a queue is registered for that
phase. Detectors 1-24 can be used as queue
detectors. Normal calls, extensions, or standard
detector stretch and delay timing are not affected.
Adaptive split inhibits
Page down from the Q detector to phase assignments
to get the adaptive split inhibits screens. For each
cycle, specify which, if any, split will be inhibited from
auto selection in relation to specific combinations of
cycle and offset.
-ADAPTIVE SPLIT SELECTION-
CYCLES 0<| NUMBER CYCLES PER SAMPLE
MODE 0 | 0= QUEUES, 1= FORCE OFFS
THRSH 0 | MIN. # Q’S/F.O. ‘S TO SELECT
SPL/PH 1 2 3 4 5 6 7 8 |
1 0 0 0 0 0 0 0 0 | 0=NOT CONSIDERED
2 0 0 0 0 0 0 0 0 | 1=SELECTED PH’S
--PGDN TO CONTINUE--
SPL/PH 1 2 3 4 5 6 7 8 |
3 0 0 0 0 0 0 0 0 | 0=NOT CONSIDERED
4 0 0 0 0 0 0 0 0 | 1=SELECTED PH’S
--PGDN TO CONTINUE--
--QUEUE DET TO PHASE ASSIGNMENT-
PHASE 1 1 2 2 3 3 4 4
Q DET 0 0 0 0 0 0 0 0
Q DELAY 0 0 0 0 0 0 0 0