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Commands that are at equal priority will behave as parallel logic control devices with the last command controlling the relay.
Remember that control devices such as switches, motion sensors and photocells only issue commands when they change state.
They are not continuous monitoring devices.
Priority Rules
The control panel recognizes a hierarchy of priorities as indicated in these general priority rules:
• A command at the LOW level can only override other commands at the LOW level. All commands at equal priority behave
in the same way.
• A command at the NORMAL level is able to override any command at the LOW level as well as any other command at
the NORMAL level. While the NORMAL command is in effect, any command from any other input at the LOW level will be
disregarded.
• If a command is set at the HIGH level it can override any command except for a command at the MASTER level. For
example, you use a Switch command at the MASTER level to turn ON a relay. Then a time scheduled at a HIGH priority
wants to turn OFF that relay. The HIGH priority OFF command from the schedule is at a lower level of priority than the
MASTER priority ON. The relay will not turn OFF until an input command at the MASTER level can turn the relay off.
• Exceptions to Normal Priority Rules:
• If a Timed ON is assigned to a switch and the ON command of that input is prioritized, it exerts a ½ step priority up from
priority that is set on that command. For instance, if the ON command of Auxiliary Input 1 is set as NORMAL and has a
60-minute timed ON, when the timer is running, the priority level is actually NORMAL +. This means that an OFF at the
NORMAL level from another switch or input will not be able to override this command. Only the switch that issued the
Timed ON will be able to cancel the Timed ON command before the timer nishes counting down. Other inputs that are a
full priority level higher, such as HIGH, in this case, would be able to cancel the NORMAL + Timed ON.
• Usually a LOW priority command will not work to override higher priority commands. However, to allow release of the
higher priorities, it is necessary to allow for some exception to the rule. For this reason, if you have a prioritized command
from a switch or other input, it is recommended that you use the opposite command from that same input to release the
priority back to the LOW level. For example, set up the ON of the input to be MASTER and the OFF of the input to be
LOW. When the MASTER is in effect, other switches at the lower priorities will not be able to function. When the MASTER
switch is turned OFF, its effect is to release the MASTER priority. The CX Panel software will then check to see if there is
a previously actuated input that should now control the lighting. This priority release and re-evaluation allows lower level
priority inputs to take control of the lighting.
• Time schedules set at LOW can override Time Schedules set at the NORMAL or HIGH level if they are controlling the
same relay. This will allow release of time scheduled prioritized commands.
• If a keypad manual command is affected on a relay and a Timed ON is assigned, this command is the highest priority in
the lighting controller. No other commands will be processed until the timer nishes counting down.
• Keypad manual commands and manual relay commands from the manual override buttons on the relay boards will force
the relay to the commanded state and to the LOW priority. This will temporarily allow any input regardless of priority to be
able to control that relay again until the next reevaluation occurs. Manual relay override button commands are not tracked
by the CX Controller.
USING PRIORITIES
Priorities, whether they are ON or OFF events should be considered individually. At each programming event the CX panel will
check the ON and OFF priorities for each controlling input or schedule and then issue actions based on the priority status of each
that is mapped to control the same relay or group.
Control inputs are treated equally. Switches, photocells and motion sensors if at the same priority will behave as though they
are logically in series. The control in this situation would change state based on last in command. The exception for Timed ON
switches in indicated above. A motion sensor and switch with equal priorities mapped to a single relay will allow either device to
turn lights ON or OFF at each state change command. Equal priorities are most often used with like devices that control the same
relay or group. Multiple switches controlling the same zone would be set with ON and OFF priorities at equal levels.
When higher or lower priorities are applied to these input devices the commands that are lower are ignored while higher
commands are in effect. The highest priority must be released before other commands of lower priorities can take effect. It is
recommended that when inputs are given higher priority ON commands that the OFF command be set at LOW to clear the control
to all other devices. This recommendation is illustrated in the examples below.
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