[jjautomation]

Hello Everyone..

I have been working on Fanuc Robodrill alpha T14ia with 16iMA control.
The mahcine is having problem with the I/O link.
There is 1 main I/O board behind the operator panel, then I/O cable JD1A runs to back of machine to basic module of connecting I/O module JD1B.

1. now my first confusion- if we remove JD1B connector from the connecting I/O module, should machine alarm for "Bad I/O Link"
but there is no alarm in machine when we remove this connector.

2. now second thing when we connect the connector back the Inputs/Outputs connected to this connecting I/O module doesn't show in PMC status.

The CONNECTING MODULE consists of Basic Module and Expansion Module as shown in the picture. These modules are connected to the Fanuc wiring PCB.

I have checked the 24V connected to this module, that is Okay.

Please help me out here...

[jjautomation]

Sorry forget to attach pictures, here are some..Attachment 188442Attachment 188444

[tc429]

this sounds a lot like a issue a coworker fought for a week on a 21, his machines 'beta' (powermate style) atc drive was acting similar on the serial link...he finally put a scope on the cheepass external linear 24 volt supply and found it was sagging on bootup enough to cause link errors. I had a kinda related issue on a M64 Mits a while back too. anymore whenever we redo a machine for anything, my first thing is to look at the 24volt draw and see if we can snip the add-on supplies out and bug in to the internal Fanuc 24v...the internal 5A fanuc supply will easily handle 90% of our machines, and being a switcher, if it has a momentary overload it faults or pops a fuse, unlike the typical cheap linear 24v supplies that can sag down to 5 or 10 volts under overloads without any indication.

just takes a minute, put a meter on the 24 and watch while booting up, might get lucky and thats all it is for you too

[jjautomation]

Thanks for the reply TC429

The machine has 2 power supplies, PU1 & PU2 both are from Fanuc as it is Fanuc Robodrill.
and I shall check as you have suggested.

The main problem is I don't have wiring manual for this model of Fanuc Robodrill.
I have 2 other model manuals, but they are not matching..
and everything I have checked seems to be fine on the basis of other manuals.

[jjautomation]

And tc429
There is no alarm regarding I/O link in machine.
Machine is showing alarms
TCZ limit switch is welding.
Z-Axis brake faulty etc.
as there inputs are not connected, which are connected through the expansion modules on the wiring PCB.

Sent from my GT-I9100 using Tapatalk 2

[jjautomation]

Anybody here having same model machine....??
Can somebody check for this problem by removing connector from connecting module, JD1B connected to base module...

[nautomation]

Dear Sir
The Problem you are facing on Fanuc Robodrill alpha T14ia with 16iMA control The Problem is hardware Failure CHeck the PCB , is it repaired ? Do you have Similar Base Module If please interchange and Confirm

[jjautomation]

Thats the main problem. No simillar machine is available for verifying. Now I am trying for machine with same modules.

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[Leadnuts]

Thats the main problem. No simillar machine is available for verifying. Now I am trying for machine with same modules.

Sent from my GT-I9100 using Tapatalk 2

I know, old thread...

Did you figure out the issue? I have some similar issues relating to the I/o and maybe 24v..

[memoryman]

The ladder generates the i/o link error message. Look at the ladder.
~10 years ago, I decoded the i/o link protocol and allowed an external device to monitor the data on the bus.