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IQ Mixer/Multiplexer Hardware Installation
Rev. 0
12345678
RS232RS422
123456
IQ ADDRESS
BAUD RATE
& PARITY
COM
STANDARD
123456
ODD
EVEN
19200
9600
4800
1200
300
2400
PARITY
BAUD
RATE
150
ON
OFF
OFF
ON
1
2
4
8
16
32
64
128
BAUD RATE PARITY
BAUD RATE & PARITY SETTINGS
PCMAC
eters of the mixer/multiplexer and the host computer
must be the same. Any mismatch will prevent com-
munication from taking place.
The communication parameters of the host com-
puter are set by the IQ software. This is true for both
PCs and Macintosh computers. Please refer to the
appropriate software manual for details.
Here are some important guidelines when configur-
ing serial communication:
• Use the same communication
standard
at each
end. If the unit is set for RS232, the computer
must also be set for RS232. (Refer also to the
appropriate IQ software manual.)
• Use the same communication
parameters
at
each end. The unit and the computer must be
set for the same baud rate and parity check-
ing.
• Use the highest baud rate possible but be
aware that
the communication circuitry (UART)
in some PCs cannot function over 9600 baud
.
(IQ mixer/multiplexers can be set as high as
19.2 K baud.)
• If the host computer fails to communicate with
the unit and the communication standard and
parameters are set correctly, try reducing the
baud rate of both the unit and the computer.
• If communication problems persist, check the
serial cable for improper wiring or possible
shorted or broken wires.
• For further assistance call either the Crown
Technical Support Group or Amcron Technical
Services Dept. (see page 22 for telephone
numbers).
3.2 Connecting to the Crown Bus (Step 2)
The Crown Bus is a serial communication loop de-
signed to transmit IQ commands and data. As a
communication standard it is independent of the
wiring system used. This flexibility is a great
strength, enabling a Crown Bus loop to be wired
with either fiber optic cabling or with inexpensive
twisted-pair wire, whichever the installation re-
quires. A single
IQ System
can have more than one
Crown Bus loop. To function properly, a Crown Bus
loop must be unbroken.
3.2.1 Setting the IQ Address
Before installing a mixer/multiplexer
on a Crown
Bus loop, it must be given a unique IQ address.
This address will be used by the
IQ System
when-
ever it communicates with the unit.
The 8-segment DIP switch shown in Figure 3.5 is
used to set the IQ address. No two IQ components
of the same model which are connected to the same
Fig. 3.5 Selecting the Communication Standard and Parameters