About Show Control; Setup; Events; Internal Vs. External Time - ETC ION Operation Manual

About Show Control

The Ion Show Control system is made up of MIDI Show Control, Serial (RS-232), Time Code (MIDI
or SMPTE), Analog Inputs and Relay Outputs, and Real Time Clock (RTC).
MIDI Show Control and Serial require minimal setup from Ion and will be discussed at the end of
this chapter. Time Code, Analog Inputs, and RTC require the use of the Show Control Display,
which is accessed by pressing [Displays]>{Record Target Lists}>{Show Control Display}. The
Show Control Display allows for the creation of event lists.
S e t u p
Ion provides user-definable settings for show control which can be accessed by pressing
[Displays]>{Setup}>{Show}>{Show Control}. For more information, see

Events

An event consists of a time or address, and an action. An event plays back (or "fires") when the
clock reaches or passes the specified event time, or an input is seen on an address. Multiple events
can be fired at the same time.
Ion supports three event actions: run a cue, control a submaster, and fire a macro. Cues can be run
from any cue list and will play on their assigned fader. Submasters can be bumped, turned on, or
turned off. Submasters do not have to be assigned to a fader. Macros execute without interaction
with the command line. If another macro is fired before the first macro completes, the first macro will
finish its action before the second is started.
I n t e r n a l v s . E x t e r n a l T i m e
The Ion Show Control system makes use of two timing sources, internal and external. The different
protocols use internal and external clocks in different ways.
Time Code (MIDI or SMPTE) normally requires timing information from an input source, like a show
control gateway. Ion can receive MIDI Time code via the MIDI input on the rear of the console. This
timing source is referred to as external time, since it is coming from a source external to Ion.
If the external time source stops for any reason, each Time Code event list within Ion has an internal
timing source which will assume control, if enabled. This internal timing source requires three
pieces of information to determine how to generate its timing: first time, last time, and frame rate.
When the internal clock reaches the last time, it will reset to the first time and continues running.
Although external timing may run faster or slower than real time, the internal clock runs only at real
time.
Analog uses external time only.
Real Time Clock uses internal time only. Since that timing information doesn't come to Ion from an
external source, it is important that all the correct information for time zone, latitude, and longitude
are properly setup in the Eos Configuration Utility.
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Show Control, page 98.
Ion Operations Manual