92 CHAPTER 9 CLICK 110
Fault latching involves how the Click 110 reacts when the ow of data from the connected
SmartSensor is interrupted. As mentioned in the Fail-safe Mode section above, if the Click
110 does not receive a datagram containing a channel that is mapped to its outputs for ten
seconds, the device will enter fail-safe mode.
In fail-safe mode, all enabled outputs will assert a detection and fault condition. e master
fault output will also assert. As long as the ow of data is reestablished within one minute,
the device will exit the mode and continue normal operation. How the device reacts when
data ow is not reestablished is determined by whether fault latch is enabled or disabled.
If S3:8 is on (up), fault latching is disabled. is means that if the Click 110 starts to receive
data again at any point aer the one-minute mark, the device will exit fail-safe mode and
continue normal operation. If S3:8 is o (down), fault latching is enabled. In this case, if the
fault condition has existed for more than one minute, normal mode can only be restored by
rebooting (front panel reset switch, power cycle, or remote reset via outstation), even if the
device has started to receive data again.
S3: Fault Latch
8 State
O Enable
On Disable
Table 9.6 – DIP Switch Fault Latch Settings
Because fault latching can only be changed using the DIP switches, there is no need (and no
option) for selecting Hardware or Soware conguration modes.
Front Panel Menu
e front panel of the device features two push-buttons and four banks of LEDs for on-
device conguration and monitoring. e rst two banks of LEDs, labeled Detection and
Fault, and the lower push-button, labeled Reset, are for basic monitoring and conguration
and are explained in the Physical Features section.
e two lower banks of LEDs, labeled Menu, and the rst push-button, labeled Mode
Switch, are used for navigating through Menu mode. is section will cover how to use
these features and the menu to congure the Click 110.
e lower bank of LEDs will be referred to as Level 1 and is used is selecting menu options.
e upper bank will be referred to as Level 2 and is used in conguring the menu options.