Crown SMX-6, MPX-6, AMB-5 Connecting to the Crown Bus Step, Setting the IQ Address

IQ Mixer / Multiplexer Hardware Installation

	BAUD RATE	COM
IQ ADDRESS	& PARITY	STANDARD

1	2	4	8	16	32	64	128	BAUD RATE	PARITY	RS422	RS232
								OFF

1	2	3	4	5	6	7	8	1	2	3	4	5	6
								ON

MAC PC

BAUD RATE & PARITY SETTINGS

	1	2	3	4	5	6
	19200
	9600
	4800
BAUD	2400
RATE
	1200
	300
	150
	ON
PARITY	OFF
	ODD
	EVEN

Fig. 3.5 Selecting the Communication Standard and Parameters

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

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