Fanuc Serial (RS232) Communications Information

Transcription

1 Memex Automation Inc. 777 Walkers Line, Burlington, Ontario Canada L7N 2G1 Fanuc Serial (RS232) Communications Information Contents Signal Description Fanuc Serial Cable Information Timing Chart When The Fanuc NC Receives Data Into Memory Timing Chart When The Fanuc NC Sends Data To External Device ISO Tape Code Chart EIA Tape Code Chart Common Fanuc Serial Alarms Page 1 of 9

2 Fanuc DB25 Signal Description Signal Name Pin # I/O Description SD 2 O Sending Data (Tx) RD 3 I Receiving Data (Rx) RTS 4 O CTS 5 I DSR 6 I SG 7 - Signal Ground CD 8 I DTR 20 O PWR 25 O FG 1 - Request To Send: This Signal is set to on when the NC starts sending data and is turned off when the transmission ends. Clear To Send: When this signal and the DSR signal are set high, the NC can send data from SD. If this signal is set low the NC will stop sending data after two more characters are sent. Jump 5 to 4 if signal isn't used. Data Set Ready: When the external device is ready to operate to needs to set this signal high. If this signal goes low anytime during data transfer, NC alarm 86 will occur. Jump 6 to 20 if signal isn't used. Carrier Detect: Signal must be strapped to DTR. Jump 8 to 20 in cable. Data Terminal Ready: This Signal is set to on when the NC is ready for operation. +24VDC Power Out - Used by External Devices such as Mx1100 UMIs - Take care when connecting Frame Ground: This electrically connects the NC cabinet ground to your external device's ground. Note: If grounds are of a different potential between devices, damage to equipment and/or electric shock can occur. Be sure all equipment is properly grounded! Memex recommends connecting Frame Ground on CNC side only to avoid ground loops. Page 2 of 9

3 Fanuc Serial Cable Information Null Modem CNC to PC Cable with Hardware Handshaking NC Control Computer DB25M DB25F DB9F SD RD 3 RD 2 RD SD 2 SD 3 SG SG 7 SG 5 <-- Signal Ground RTS CTS 5 CTS 8 CTS RTS 4 RTS 7 DSR \ DTR / CD / NB: Fanuc CNCs have Pin 25 = +24VDC Null Modem CNC to PC Cable without Hardware Handshaking NC Control Computer DB25M DB25F DB9F SD SD 3 RD 2 RD RD 2 SD 3 SG SG 7 SG 5 RTS RTS 4 RTS 7 <-- Jumpering 4 to 5 on the CNC is the most important part here CTS CTS 5 CTS 8 DSR DSR 6 DSR 6 DTR DTR 20 DTR 4 <-- Fanuc CNC side Needs Pins 6, 8 & 20 Jumpered or you get an "86 CD Alarm" CD NB: Fanuc CNCs have Pin 25 = +24VDC Page 3 of 9

4 Timing Chart When The Fanuc NC Receives Data Into Memory 1. NC outputs DC1 (Hex 11 or ASCII 17). 2. The external device starts sending data upon receiving DC1. 3. The NC sends DC3 (Hex 13 or ASCII 19) when the NC processing is delayed or input buffer is full. 4. The external device stops sending to the NC after receiving DC3. The external device can send up to 10 characters after receiving DC3. If more than 10 characters are sent after the DC3 was sent Alarm 87 will occur. 5. The NC sends DC3 after completing delayed processing and input buffer is empty. 6. The external device resumes sending data after receiving DC1. 7. NC sends DC3 upon completing data read. 8. The external device stops sending data to NC. Page 4 of 9

5 Timing Chart When The Fanuc NC Sends Data To External Device 1. NC outputs DC2 (Hex 12 or ASCII 18). 2. NC outputs punch data in succession. 3. When data processing is delayed by the external device, including the character currently being sent if the CTS (CS) signal is turned off: a) Data output stops within two characters including the currently transmitted character when CTS (CS) signal is input to the NC. When CTS (CS) signal is turned on again, data transmission starts. (Fig. A) Fig. A b) If the control code DC3 is input to the NC, the NC will stop data output within ten characters. When control code DC1 is input to the NC, the NC will start sending data again. (Fig. B next page) Page 5 of 9

6 Fig. B 4. The NC starts sending the next data in the output buffer if the CS signal is turned on after the external device completes data processing. 5. NC issues DC4 (Hex 14 or ASCII 20) upon completing data output. Page 6 of 9

7 ISO Tape Code Chart Page 7 of 9

8 EIA Tape Code Chart Page 8 of 9

9 Fanuc Serial Alarm Codes 001 TH Parity Error 002 TV Vertical Parity Error (Set TV CHECK OFF in Settings) 070 Insufficient memory 072 Too many programs 073 Program number already in use (If program contains no number or is not properly formatted, CNC may attempt to load as program #0000) 075 Program # not found in first block. (Check program format and DNC Format settings) 085 Framing error. Set DNC to 7 data bits even parity and make sure CNC and DNC are set to same baud rate) 086 I/O Device Problem on RS232. Cable may be disconnected or wired incorrectly, CNC serial port may be defective, or wrong CNC serial port is selected (parameter). 087 Buffer overflow on input. Page 9 of 9