(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:
CC 1200,0,0,1
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 2
0
bit, ADR2 represents 2
1
bit, and ADR4 represents 2
2
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.
DMC-2X00 Chapter 4 Communication y 49
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