Page 16 of 102
TVL 351
ISSUE 15
During a down peak idle cars can be made to park at specified down peak parking levels (refer to earlier section on
parking) and down landing calls at all floors can be boosted.
By default, peaks are disabled and must be enabled by the installer once site traffic conditions have been assessed.
A full description of all parameters relating to peak processing follows.
Peak Invocation - Peak processing is invoked by one of three triggers:
1. Input activation, peak processing begins on activation of the relevant input (refer to job specific wiring
diagrams) and persists until the input is deactivated.
2. Timer activation, peak processing starts and ends at user definable times.
3. Automatic activation, peaks begin when the appropriate start conditions have been met and persist for
the duration of the peak traffic condition or at least as long as the user definable peak duration time.
Peak Prioritisation - When up and down peaks coincide activation adheres to the following sequence (highest to
lowest):
Input activated down peak
Input activated up peak
Timer controlled down peak
Timer controlled up peak
Automatic down peak
Automatic up peak
Up Peak
Defines the up peak traffic start conditions, choose between input, time clock or automatic initiation. Provides a
boost for calls at the main floor during up peak traffic.
Inputs: "UPK ", "Up Peak Input"
Down Peak
Defines the down peak traffic start conditions; choose between input, time clock or automatic initiation.
Inputs: "DPK ", "Down Peak Input"
Group → Lobby Service
Delays cars leaving the lobby floor to encourage higher occupancy.
Group → Floor Preference Boost
Provides user settable boosting of calls at individual floors.
On delivery to site, controllers are pre-set with default settings. The default settings provide a good level of service
for a wide variety of conditions however; Installers may choose to configure the dispatching features for optimum
performance on each site.
Step By Step Guide To Dispatcher Configuration
The following guide is an optional series of steps that may be followed by the installer to tune group performance.
Peak configuration should be performed with all cars in service. Knowledge of traffic patterns and building
population is a prerequisite to dispatcher tuning. An Ethos Two group that is not tuned on site will still provide good
service. Incorrect configuration may produce a serious reduction in group performance.
Step 1. Check normal homing levels have been defined appropriately and homing is enabled. A homing time of 10
seconds is typical.
Step 2. Define parking levels for up and down peak traffic. If peak parking levels are not required, ensure the peak
parking assignments are set to the same levels defined in the normal parking assignment table.
Step 3. Depending upon which peak activation trigger is used (input, timer or automatic) set peak timers or
automatic detection parameters as required.
The active peak mode is displayed on the Ethos Two main status display. Events are stored in the event log to mark
the start and end of each peak. If automatic peak detection is required, use the following guidelines.
For automatic up peak activation start out by increasing Max Down Calls and reducing Min Car Calls and Min
Loaded Cars from their default values. By monitoring the number, duration and time of up peak events in the event
log optimal sensitivity of the system can be obtained. Similarly, for automatic down peak activation Max Up Calls
should be increased and Min Down Calls reduced from the default settings until the required sensitivity has been
reached.
Be conservative with Up and Down peak weighting. It is recommended that these parameters be left set at the
default value of zero. Even moderate values can lead to an increase in the number and duration of long wait times
for reverse traffic flow.
Step 4. For ad hoc boosting of specific floors, use Floor Preference. Set Floor Preference back to zero when
boosting is no longer required.
Step 5. Use Lobby Service to increase utilisation of cars at the lobby if necessary.
Note that whilst parked at the lobby level the lobby car will not be assigned landing calls from other levels.
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