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AcraDyne Gen IV iAC Controller Manual
Figure 3: Timed Mode (assignment deactivates before time expires)
Flash
In the “flash” mode the output will flash at the time
rate while the assignments state is active (while still
observing the polarity setting).
Figure 3 Flash Mode
Width and Offset
For multiple bit outputs (for example “Running PSet
Number”) the width variable defines the number of
bits the assignment will output. This allows the output
size to be restricted to a few bits saving space for
other assignments.
The offset variable allows a fixed value to be added
to the value before it is output.
For example to use bits 4 & 5 of the physical outputs
to indicate the selected parameter set number 1-4
as binary 0-3 the assignment would look like…
Running PSet Number
Bus
1 For the physical bus
Element 0
For the first element on the bus
Bit
4 For the starting bit location
Width
2 To span the two bits 4 & 5
Offset
-1 Adding -1 to the read input value so
we get…
1 = Binary 00
2 = Binary 01
3 = Binary 10
4 = Binary 11
Polarity
When the polarity is set to N.O. the output will be
high when it is active (24vdc for physical outputs
and logic 1 for all network type buses). When the
polarity is set to N.C. the output will be low for active
(0vdc for physical inputs and logic 0 for all network
type buses).
Mode
Normal
In the “Normal” mode the output will track the state
of the assignment (while still observing the polarity
setting). If the polarity is set N.O. and the assignment
has an active output the output will be on and stay
on till the assignment goes to inactive.
Figure 1: Normal Mode
Timed
In the “Timed” mode the output will come on when
the assignments state goes active and go off based
on the time value or the assignment state going
inactive (while still observing the polarity setting).
Figure 2 Timed Mode
