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-   -   Two Breakouts (http://www.chiefdelphi.com/forums/showthread.php?t=134618)

VaneRaklan 14-02-2015 20:59

Two Breakouts
 
So I had a question about wiring up more than one pneumatic breakouts. We have two wired up but the RoboRIO is only reading/seeing one of them. Any ideas on why this is or how to fix this?

ATannahill 14-02-2015 21:03

Re: Two Breakouts
 
Do you have them both wired through the CAN network?

Can you see two if you go to roboRIO-2557.local in your web browser? If so, what are their CAN addresses?

VaneRaklan 14-02-2015 21:06

Re: Two Breakouts
 
Yes we do. They are both wired through the CAN network and when we access the viewer for the RoboRIO, we are only seeing one of the breakouts (ID being 0)

ATannahill 14-02-2015 21:09

Re: Two Breakouts
 
What are the lights on each device doing?

ozrien 14-02-2015 21:48

Re: Two Breakouts
 
If you have two PCMs on the bus with the same ID they will show up as one device. The "Software Status" will report "There are two devices with this Device ID". Use the webdash to change it's ID and then full-refresh the browser so the treeview updates.

This is better explained in section 2.2 of the Talon SRX Software Reference Manual. Even though you are using PCMs, the webdash features are the same for PCM and Talon for the most part.

rich2202 14-02-2015 22:38

Re: Two Breakouts
 
I'm not a CAN expert, but I think that all PCM's have the same CAN ID. If you want two, then you have to modify one of them to have a different CAN address.

However, why do you need more than one PCM? If you need to run more solenoids, then use the PWM outputs. The MXP port gives you access to 10 to 15 more ports.

Schnabel 15-02-2015 01:41

Re: Two Breakouts
 
Quote:

Originally Posted by rich2202 (Post 1444209)
However, why do you need more than one PCM? If you need to run more solenoids, then use the PWM outputs. The MXP port gives you access to 10 to 15 more ports.

And how do you suggest they convert a 5v pwm signal into the required 12/24v a solenoid runs on?

rich2202 15-02-2015 06:07

Re: Two Breakouts
 
Quote:

Originally Posted by Schnabel (Post 1444346)
And how do you suggest they convert a 5v pwm signal into the required 12/24v a solenoid runs on?

Good point. I forgot about that. It would be expensive to use spike relays.

I think the instructions to change the CAN BUS ID of the PCM is here:
http://wpilib.screenstepslive.com/s/...ribution-panel

Then, in your software, there should be a way to create a second Pneumatics process with the 2nd ID.


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