Re: [foxboro] Nodebus Cable B fault

Sometimes it is difficult to tell what the original fault was.  Once
the nodebus test initiator marks a cable faulted, there is no more
traffic on that cable - that's why your leds stopped flashing.
Running the nodebus cable test with no faults found restarted comms on
that cable.

Some things to look for:
Marginal patch cable
High traffic
Crossed cables
Local nodebus cable length or number of cellbuses exceed maximums
FONBE issues
Termination and/or grounding problems
Faulty RCNI

If you continue to get RB errors on the AW70, I'd look at the RCNI
and/or patch cables first.

Regards,

Kevin FitzGerrell


On 2/24/08, Kashif Ijaz <kashifijaz93@xxxxxxxxxxx> wrote:
> I found the current Nodebus test Initiator was AW70(No control), when I 
> changed this to AW51F. Then the fault disappeared and the LEDs of Switch B 
> also started flashing.
>
> What can be the cause. Is the AW70 not designed for being the Nodebus 
> Initiator?
>
> Best regards,
>
> Kashif Ijaz
> INTECH Process Automation> From: kashifijaz93@xxxxxxxxxxx> To: 
> foxboro@xxxxxxxxxxxxx> Subject: [foxboro] Nodebus Cable B fault> Date: Sun, 
> 24 Feb 2008 16:10:26 +0500> > I have a system with 3 CP60's and one AW51F, 
> one AW51B, two WP51Fs, one AW70 (no control, just as OPC server). The system 
> is version 7.1.1. There are two NCNIs (redundant, one selected at Nodebus A, 
> other at Nodebus B) connecting to Entersys switches ( two, one for A and 
> other for B). But I am getting Bad Cable B fault on the Nodebus in SMDH and 
> also there is red "RB" at AW70.> > Could it be that AW70 is causing the 
> problem but I think if we use two NCNIs for both Nodebus cables A and B and 
> then RCNIs of AW51F and WP51Fs and AW70 are connected to both Fiber A and B 
> from the switches.> > also the LED flickering on the ports of Enterasys 
> switch is slow as compared to A switch.> > Can anyone suggest way forward to 
> troubleshoot this.> > Regards,> > Kashif Ijaz> INTECH Process Automation> 
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