Fanuc Communication Problem

[pinal2080]

Hello everyone,
can anybody tell me how can i use M74 port in Fanuc 0M control? i know to change the parameter no 50, 250 and 38 for that and select I/O=2; but is there any other parameter in 900 series parameter to be changed in order to activate the M74 port?!? as when i choose I/O=2, 50, 250 and 38 as per requirement then also it is not happening anything at all!! not even any alarm is coming! I want to use M74 because with M5 port i am getting 087 PS alarm....

[MMMMM]

Which PS alarm are you getting?
It might just be easier to fix your problem (M5) then to create another one

[angelw]

Originally Posted by pinal2080

Hello everyone,
can anybody tell me how can i use M74 port in Fanuc 0M control? i know to change the parameter no 50, 250 and 38 for that and select I/O=2; but is there any other parameter in 900 series parameter to be changed in order to activate the M74 port?!? as when i choose I/O=2, 50, 250 and 38 as per requirement then also it is not happening anything at all!! not even any alarm is coming! I want to use M74 because with M5 port i am getting 087 PS alarm....

Not that I'm aware of.

I agree with Doug, you should try and resolve the P/S 087 issue. This is often caused by the PC and not the control. Frequently, the Serial Port of the PC can't react quickly enough to the Xoff (DC3 - Ascii 19) control character, and can often be resolved by adjusting the FIFO settings accessible via Device Manager > Ports > (Select the Com Port) > Port Settings > Advanced.

When the PC Comms Software is configured to Xon Xoff (Software Handshaking), the control characters DC1 (Xon) and DC3 (Xoff) are not actually seen by the software, but are interpreted at System Level by the Uart. However, if you set the software Handshaking to None, then the control characters can be displayed, if the software doesn't have some type of filtering feature. If the control characters can be displayed, they won't be recognizable to you. Control characters come under the heading of unprintable characters and will appear as symbols.

To check if your control is actually sending Control characters:
1. Set you PC software handshaking to None, and whatever needs to be done to have the application Receive a file from the control.
2. Set the Control ready to Receive a file, that's correct, both the control and the PC are set to receive.
3. Press the Read or Input button at the control to initiate the Receive of a file. The Control should send an Xon (DC1) character to the PC, and perhaps a string of Null characters, depending on parameter settings.

If the PC is able to display control characters, and receives something, then its likely that the control is working correctly, and the issue of the P/S 087 is with the PC. If you do get some characters being received by the PC, save them to a file and include it as an attachment to a Post here. I can interpret what the characters are and confirm for you that Xon is being transmitted.

This test will only confirm that the Control is transmitting control characters, and in particular Xon (DC1). It will not confirm that Xoff (DC3) is being transmitted, and this is the character that is required for the PC to stop sending data to the control.

If it can be confirmed that the control is NOT sending control characters, you could use Hardware handshaking to resolve this issue. Hardware handshaking is always more reliable, but most set their CNC/PC RS232 communication to use Software handshaking mainly because the cable is easier to make.

If you want to resolve the issue using the M5 port, see how you go with the above. I, or another member of the Forum will be able to provide more assistance once some results of the above test are known.

Regards,

Bill

[pinal2080]

Dear Bill
Thank you,
Well program can be transfered to any other machine with same control. It gives problem with that machine only, so i was thinking how it can be the problem with PC, one more thing, i have taken the backup of the machine in the same PC from the same machine, it was successfull but when i try to transmit program into the machine it is not happening ; p/s 87; Again, when i reset the all memory and then loaded the option parameter first and then load the backup back in to the machine it was successfull but then after i try to transfer the program it is not working; it is not working even in some other programs, i have tried different programs as well.

although i will check whatever you replied to my thread and let you know

[angelw]

Originally Posted by pinal2080

Dear Bill
Thank you,
Well program can be transfered to any other machine with same control. It gives problem with that machine only, so i was thinking how it can be the problem with PC, one more thing, i have taken the backup of the machine in the same PC from the same machine, it was successfull but when i try to transmit program into the machine it is not happening ; p/s 87; Again, when i reset the all memory and then loaded the option parameter first and then load the backup back in to the machine it was successfull but then after i try to transfer the program it is not working; it is not working even in some other programs, i have tried different programs as well.

although i will check whatever you replied to my thread and let you know

Its curious that you're able to upload the parameters without an issue. I can't imagine there would be a separate Uart for System information.

When sending a program to the control:
1. do you set the PC to send the file and wait for the control to initiate the Transfer, or do you get the control ready first?
2. do you experience the p/s 087 alarm immediately on sending the file, or is some of the program transferred before the alarm is raised?

Regards,

Bill

[pinal2080]

Dear Bill,
Thank you again,
Well i get PC ready to send the program, and then i press input on machine side, and immediately i get P/S 87 Alarm, and when i reduce the Baud rate it gives me P/S 71 Alarm, i dont know what is going on, i can load and download the parameter but then after i cant load the program.

[angelw]

Originally Posted by pinal2080

Dear Bill,
Thank you again,
Well i get PC ready to send the program, and then i press input on machine side, and immediately i get P/S 87 Alarm, and when i reduce the Baud rate it gives me P/S 71 Alarm, i dont know what is going on, i can load and download the parameter but then after i cant load the program.

The p/s 71 alarm is a strange one under these circumstances.
1. Are you able to enter a program manually via Edit mode?

2. When you press Input and you get the p/s 87 alarm, does the PC program start sending and then appears to continue sending?

If Yes to 2 then the control is doing the right thing and is sending DC1, and coupled with the p/s 71 alarm, could point to a memory issue, particularly if a program can't be registered manually.

Regards,

Bill

[TAUHEED]

please am having a problem with VMC-750 it over travel in Y 100 please kind assist me

[TAUHEED]

Originally Posted by TAUHEED

please am having a problem with VMC-750 it over travel in Y 100 please kind assist me

GSK 980TDa is not responding for tool change here is the PLC alarm message (tool change too long ADRESS A0000.0) help me with the solution