Galil DMC-2X00 user manual Daisy-Chaining DMC-2000 only, Address

(Configure Communication) at port 2. The command is in the format of: CC m,n,r,p

where m sets the baud rate, n sets for either handshake or non-handshake mode, r sets for general port or the auxiliary port, and p turns echo on or off.

m - Baud Rate - 300,1200,4800,9600,19200,38400 n - Handshake - 0=No; 1=Yes

r - Mode - 0=General Port; 1=Daisy-chain p - Echo - 0=Off; 1=On; Valid only if r=0

Note, for the handshake of the auxiliary port, the roles for the RTS and CTS lines are reversed. Example:

CC1200,0,0,1 Configure auxiliary communication port for 1200 baud, no handshake, general port mode and echo turned on.

Daisy-Chaining (DMC-2000 only)

Up to eight DMC-2000 controllers may be connected in a daisy-chain allowing for multiple controllers to be commanded from a single serial port. One DMC-2000 is connected to the host terminal via the RS232 at port 1 or the main port. Port 2 or the auxiliary port of that DMC-2000 is then brought into port 1 of the next DMC-2000, and so on. The address of each DMC-2000 is configured by setting the three address dipswitches (A0, A1, A2) located on the front of the controller.

When connecting multiple controllers in a daisy-chain, the cable between controllers should be female on both ends with all wires connected straight through.

ADR1 represents the 20 bit, ADR2 represents 21 bit, and ADR4 represents 22 bit of the address. The eight possible addresses, 0 through 7, are set as follows:

A2	A1	A0	ADDRESS
OFF	OFF	OFF	0
OFF	OFF	ON	1
OFF	ON	OFF	2
OFF	ON	ON	3
ON	OFF	OFF	4
ON	OFF	ON	5
ON	ON	OFF	6
ON	ON	ON	7

To communicate with any one of the DMC-2000 units, give the command “%A”, where A is the address of the board. All instructions following this command will be sent only to the board with that address. Only when a new %A command is given will the instruction be sent to another board. The only exception is "!" command. To talk to all the DMC-2000 boards in the daisy-chain at one time, insert the character "!" before the software command. All boards receive the command, but only address 0 will echo.

NOTE: The CC command must be specified to configure the port P2 of each unit.

4 • Chapter 4 Communication DMC-2X00