Logic Function 183
User Guide v 1.0 — February 2020 System Options
The tabs at the bottom of the Configurable Signals screen give access to the signals. There
are three configurable signals on each tab.
One to four conditions can be set for each configurable signal. Use the Logic Function and
Force (if necessary) to set how the configurable signal will operate.
13.1.5.1 Logic Function
When set to AND, the configurable signal is TRUE only when all conditions are TRUE. When
set to OR, the configurable signal is TRUE when one or more conditions are TRUE.
When set to LATCHING, a configurable signal is TRUE when a specified event occurs. The
signal stays TRUE until another event sets it FALSE.
When the LATCHING logic function is selected, each condition row will show a Latch action
that you can set to Latch or Unlatch.
When a condition row is TRUE, one of the Latch actions that follows occurs:
• If set to Latch, the configurable signal is set to TRUE
• If set to Unlatch, the configurable signal is set to FALSE
The configurable signal then stays in this state until a different condition row changes it.
A configurable signal with more than one condition is evaluated in the order that the
conditions are listed, top to bottom. Thus, it is possible that the configurable signal becomes
latched and then unlatched at the same time. The final signal (TRUE or FALSE) is set by the
last action that was evaluated.
13.1.5.2 Force
You can force a configurable signal High or Low (TRUE or FALSE). This will override all of the
condition settings that are configured for a signal.
When Force is set to None, the signal operates by the configured conditions.
When Force is set to Low, the configured conditions are ignored and the signal stays low
(FALSE).
When Force is set to High, the configured conditions are ignored and the signal stays High
(TRUE). The Active indicator illuminates.
This setting can be used to manually force a signal to High or Low when a signal's status must
stay in one state for an operation. This helps when you initially configure other signals for an
operation that would be triggered from the forced signal. Also, you can use Force to bypass
specific signals when troubleshooting.
13.1.5.3 Conditions
Four conditions are available for each configurable signal. Touch the Signal Type field next
to each condition you want to set. You can select from the signal types that follow:
• Digital Input
• Controller Functions
• Configurable Signal
• A Husky control technology installed on your Altanium system, such as UltraSync-E
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