RS232 controllers of Fanuc 0-PC

[scottsr60]

Hi All,

Does anyone know where the controllers (uart chips) or the signalling for RS232 originate on a Fanuc 0-PC controller. I have gotten conflicting answers from my machine vendor support and Fanuc support. One says that the chips are on the Memory Board (A16B-2201-0103/07A) the other claims they are on the Main Board Assembly (A20B-2000-0175). I am trying to track down a port problem, but don't know for sure where to look.

Thanks,



Scott

[Al_The_Man]

If you are coming out of the honda M5 connector on the main board then you should be able to trace the IC by following the respective RS232 signal pins back.
The M5 is on the main board so any RS232 IC should be close by.
I have used this method on a few different controls, not particularly the 0, but the method should work.
Al.

[scottsr60]

Thanks Al !!!

The chips are directly downstream from the connectors. Although I'm confused since there are 4 chips that are all quad rs232 packages????

On this particular Fanuc configuration they are located on the Memory Board along with the connectors M5 and M74.

Regards,


Scott

[vpcnc]

0M-A and 0M-B series control the chips are located on the Main Board.
When I have to replace these, I replace all 4 as a set.
These are 14 pin DIPS two 88's and two 89's
Keep the Battery Pack pluged in when you remove the board to work on it.
Clip off the chips, un-solder each pin, and then use a solderpult to suck out the holes.
Solder in Sockets, and install new chips.

On 0M-C series these are still 14 pin DIPS but they are now located on the Memory board.

Again, Make sure to keep the Battery Pack Plugged in.

On newer 0 Series they are on the Memory borad but they are now surface mount chips. still two 88's and two 89's

I have never had to replace the Uarts.

The Chip damage / Static Damage I have seen has always been limited to the 88's and 89's

I've been 99% succesful in keeping all of the programs and parameters intact, by keeping the battery pack plugged in.

Only One time did I loose the memory.

[scottsr60]

After some conversations with a FANUC Factory Technician, I came to find out that my issue is parameter related. Apparently the 0P-C controllers for a turret punch press are configured differently than say a CNC milling machine by their respective manufacturers. My equipment maker, Strippit typically does not configure the system for bidirectional communications. This setting is directly controlled by bit 1 of Parameter 18. A zero in bit 1 sets the controller to a read only configuration regardless of which I/O device you choose.

Store that information back in the memory banks for future reference...