Fanuc OM Alarm 087

[ED209]

Can anyone please explain what alarm 87 on a Fanuc OM means ?.

Alarm 087

When entering data in the memory by using Reader / Puncher interface, though the read terminate command is specified, input is not interrupted after 10 characters read.

Our programs look like the following;

%
O0010(ABC-123-ABC-A.123)
(ABC-123-ABC-A.123)

N10
N20
N30
...
...
M30
%

[guhl]

Also manual says in alarm description "PCP or I/O unit defective
There is another explanation of alarm 087 in attached PDF page
If you need I can send you the total manual

[ED209]

Thanks, your version reads different from the manual we have.

[dcoupar]

PS087 is Buffer Overflow. Your PC doesn't stop sending within the
allotted time (10 characters) of receiving the XOFF.

Check your Windows - Control Panel - System - Hardware - Device Manager - Ports - under Advanced there's FIFO Buffer settings. Slide them all the way to the left then uncheck "Use FIFO buffers".

OK all the way out and then restart your PC to have the changes take effect. See if that does the trick.

[WGoyer]

I think your handshaking isn't working. Most people use software handshaking (Xon/Xoff) or also known as DC codes (DC1 through DC4). Handshaking is meant to stop the transfer until the control needs it.

Some people use hardware handshaking to accomplish the same thing. If your cable has just three wires, it most certainly is set up for Xon/Xoff.

Slowing down the baudrate on both ends can sometimes make enough difference so handshaking isn't needed, especially if you are just loading memory, not drip feeding.

Warren
www.uptimecorp.com

[fanucman]

check the io settings.. and baudrates with the computer you are trying to communicate with..

Iso=1
if

I/o channel is
0 check parameter 2 bit 0 and 552
1 check parameter 12 bit 0 and 553

probably a bad setting.. computer setting four stop bits and baud rate must match