Wavetronix smartsensor advance - Page 74

CHAPTER 7  CHANNELS-ALERTS-ZONES 73
Normal channels consist of four alerts, each containing four zones. A normal channel’s
output is a logical combination of the channel’s alert, zone, delay and extend settings (see
Delay and Extend sections under Latched Channels). e normal channel’s output be-
comes active when the associated alert and zone logic, the channel delay or the channel
extend are satised.
Each enabled normal channel must have at least one enabled alert. If you attempt to save an
invalid channel conguration, the following message is displayed (see Figure 7.10).
Figure 7.10 – Invalid Channel Configuration
Latched Channel
Latched channels consist of two alerts (ON and OFF), each containing up to four zones
(see Figure 7.11). A latched channel, by denition, has exactly two enabled alerts that can-
not be disabled.
Channel 1
ON
Alert
OFF
Alert
Zone
1
Zone
2
Zone
3
Zone
4
Zone
1
Zone
2
Zone
3
Zone
4
Figure 7.11 – Latched Channel Heirarchy
Latched channels dier from normal channels in that the channel output remains in a
given state until a contradictory alert is exclusively activated, or a maximum latch time has
expired (see Figure 7.12).