9 Appendix A
9 - 1
9 Appendix A -- PC Operation with HUST CNC Controller
9.1 Applications
Via the communication ports between the HUST CNC controller and the PC, users
can do the following operations from the PC terminal.
1. Command the controller to send data to PC or to execute function from PC.
2. Report or display the CNC machine status on PC screen.
3. Download/upload the MCM parameters from PC.
4. Download/upload or execute a CNC part program from PC.
5. Execute the user designated functions through the command of special S-bit,
S104~S111.
6. Download/upload (write/read) the MACRO G65 variables from PC.
9.2 Equipment
1. HUST CNC controller with RS232C communication port.
2. IBM PC or equivalent with RS232 port and CRT monitor.
9.3 Communication Protocol
1. RS232C Asynchronous communication
2. Baud rate : 4800
3. Parity : Even, 2 stop-bits
4. Data bits : 7 bits
5. Data format : ASCII codes
6. RTS/CTS : Handshake
7. DC1/DC2/DC3/DC4 Handshake
DC1~DC4 are of ASCII codes.
DC1 represents Hex data of 11H.
DC2 represents Hex data of 12H.
DC3 represents Hex data of 13H.
DC4 represents Hex data of 14H.
The method and the format that are used to establish communication between PC and
HUST CNC controller are to be discussed in the following sections. The format
specified has to be strictly followed.
9.4 Command the Controller to Send Data to PC or Execute Function
Format:
DC2 --- Command START.
%<CR>
O9000<CR> --- O9000, PC command to request data.
N010111000.....<CR> --- Main command line starting with a letter N followed
by On/Off switch (1/0). See below for 0/1
explanation.
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