Wheatstone E-SAT, Technical Manual

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page 3 – 19
E-Series Network / Apr 2007
X P O I N T S O F T W A R E S E T U P G U I D E
Configuring Logic I/O
Overview
The LIO-NCA adds 12 programmable logic functions, configured
individually as inputs or outputs, per card. The addition of logic I/O adds
a powerful level of complexity to your Wheatstone router and care must
be exercised during configuration to ensure the proper results. It is
important to understand that there are two primary ways to configure the
physical logic ports in software - routable logic or triggered ports. Which
type you choose depends on the particular application.
Routable Logic
Routable logic allows the user to make logic signal crosspoints in the
same way audio crosspoints are made. Routable logic may be configured
as independent “LIO Only” signals (e.g. switch inputs and solid state relay
outputs); or up to twelve logic input or output signals may be mapped, or
“piggybacked”, onto audio signals.
Independent “LIO Only” logic signals may be cross connected just like
audio signals. An external switch or relay closure wired to activate a logic
input may be routed to control device A, B, C, etc., as required. The
duration of the solid state relay output follows the duration of the input
signal, thus allowing for latched or momentary applications. LIO Only
Sources are typically cross connected to LIO Only Destinations, but
mapped logic signals may be cross connected to independent logic signals
as long as the assigned logic functions match.
Mapped logic signals enable the user to automatically route up to
twelve logic signals along with an audio source. When an audio source is
routed to a destination, all logic mapped to the source device is automati-
cally routed to the destination device. The mapped logic I/O configuration
greatly simplifies the management of control signals in a variety of
scenarios including multi-recorder control, backup automation switch-
over, and studio sharing applications.
Triggered Port Logic
Triggered port logic is a special class of logic I/O that uses a GPI or
simple switch closure to fire a predefined Salvo or to make a temporary
audio crosspoint. When a logic input port has been configured as a
triggered port, the corresponding output port is dedicated as a tally-back
function. Tally-back is provided as a means of confirming that the salvo
has fired or the temporary audio crosspoint has been made. Triggered port
logic is configured using the LIO Card Definitions form. Please see
Configuring Triggered Port Logic later in this section.