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Unread 09-15-2010, 11:00 AM   #141
Getting Wild
 
Join Date: May 2010
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Default Re: Programming Curtis Controller

Hi PaoloGigli,

I don't know the 1243C, but if one looks at other controller, of example 1244C one can see a 6-pin molex connector for the can-bus. The Serial bus connector which is a 4-pin molex connector is still on this unit. So I guess 1243C is not can-bus only.

Do you have a 4-pin molex connector on your controller? You should connect your serial interface here!

If I understood correctly, can-bus had a protocol built in the hardware of an interface cable. So a simple level shifter or RS..... interface is not enough. If you configure programming software for can-bus you realy need a can bus interface cable.

If the status led blinks there is a fault detected, maybe the controller is not hooked up to the motor, or throttle. There is some info on the led en status output pins in the manual.

What kind of interface did you try to use?

Regards,
Edwin
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Unread 09-26-2010, 03:54 PM   #142
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Join Date: Sep 2010
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Default Re: Programming Curtis Controller

Thank you for responding satfrx! :)

Yes, I have 4-pin molex and according to SAE 81c91 inside I really have CAN communication.
Power board have 1243 designation.
Status blinks mean HW failure, but what this does mean realy, power part, controller part or both. In any case, PIC 16C77 is alive.
I have try with TTL RS232 like people explained here. I need some kind of CAN gateway like manual says (or 1309 RS232 CAN converter :) ).

Regards,
Paolo
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Unread 09-27-2010, 12:13 PM   #143
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Default Re: Programming Curtis Controller

One would expect the 4-pin connector to be RS232. Is there 6-pin connector as well, this usually is CAN-bus I believe.

HW failure, is this like missing a motor connection, or throttle not connected? I have not enough experience with these controllers to know what is ment by hardware failure. I expect it to be external hardware.

You did use the rs-232 to ttl interface and invert it using the hex-inverter chip sn74ls04? Remember PC port TX connects to RX port on 4-pin molex connector. PC port RX connects to Cutris TX port.
If you are not sure, just reverse pins, nothing will get damaged.

Did you use enhanced serial or just serial to connect. It seem to differ with the type of controller one has.

Regards,

Edwin
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Unread 10-02-2010, 02:09 PM   #144
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Default Re: Programming Curtis Controller

Hello, i am new here and i am very happy that i found a lot of information here for my repairs ( not for the money, just hobby ).

I finely can program the 1225-2401 controller from Curtis.

Thanks to all the info on this forum.

I tell how:

I became a RS232 to TTL converter from the internet, a little one that fits in the serial connector and placed a inverter ( the HEF40106 ) in the TTL signals. Now i have a connection between the pc and the controller.

I place later picture's of the interface, just find out how.
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Unread 10-02-2010, 02:24 PM   #145
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Default Re: Programming Curtis Controller

The picture's:

















Greatings
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Unread 10-08-2010, 11:03 AM   #146
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Arrow Re: Programming Curtis Controller

I hope this helps somebody:

I have a Curtis 1238 controller and had trouble programming it. The software would never connect.

The problem ended up being the buffer settings for my USB to RS-232 serial converter. Go to device manager, then COM ports. Right click on your adapter and go to properties. On the port settings tab, click advanced. Then turn down any buffers as low as they can go and Especially turn down any delay that might be there. Then it should work.

I tried three different USB-serial cables. One was from Radio Shack, a GigaWare piece of crap that kept giving me the bluescreen. I think that the driver just did not support win7. (By the way, the Curtis software does work on win7 just fine.) The second was a Prolific chip based converter and I still was not able to make it work. The third was an FTDI chip based converter. This is the one that I was able to make work, after I turned the buffers and delay as low as they could go.

For the output of RS-232, I connected a MAX-232 and 7404 Not gate inverter (as mentioned earlier in this thread) powered with a 7805 5-volt regulator which was powered by the Curtis +12V and ground wires. My controller cam with a wiring harness which included a connector for the Curtis 840 display. This is a 6-pin connector, but only uses 4 (+12V, GND, serial TX, serial RX).

Using an O-scope, I was getting a 0V nominal +5V pulse, as I expected, to and from the controller, but the 1314 software would not see it. Using a terminal program on my computer, I was able to read the constant stream of serial data from the 1238 controller. And when I would a character, I knew it received it because it would interrupt the serial transmission and wait for more data.

My understanding is that if you can find a computer with a hardware (built-in) 9-pin serial connector COM port, you will be fine. You will still need to convert it to TTL serial though, using either the MAX chip setup, or the official Curtis cable ($375), or a RS-232 to 5V TTL converter like the one that B&B Electronics sells for $50.

On a separate note, I had another issue with setting-up my 1238. The contactor I have is an EV200AANA "with coil economizer". This contactor has a circuit inside the box on the side that takes the voltage and creates a PWM signal so that the contactor does not use a ton of electricity and get really hot. The problem was that the 1238 contactor output was set to send out a PWM. So the PWM into a PWM circuit caused problems. Evidently you are supposed to use an LEV200 contactor that does not have this coil economizer. I guess that usually it wont even close the contactor, but for me it was. However, my AC-20 motor was just ticking or clicking and not spinning. I think that when the controller tried to pull current through the contactor it must have been partially opening up, or maybe it never fully closed and only let a small amount of electricity through. Anyway, I simply pulled the board off and connected straight to the coil and everything was dandy.

I hope this helps,
JonR
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Unread 10-18-2010, 08:21 AM   #147
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Default Re: Programming Curtis Controller

Quote:
Originally Posted by lalunatech View Post
Hiya,
I made up a serial level converter to your design Edwin (satfrx) and it worked well on a Curtis 1228 off a mobility scooter, thanks for sharing! The enhanced serial didn't work for me but the standard mode did, probably the different model of controller. Photo attached. I will put a longer cable on the RS232 computer side to make it easier to place the laptop but I guess the TTL level side needs to be short to cut down signal degradation.

I have bought a USB to Serial (FT232RL Breakout) - 5.0 V module from hotsolder.co.uk and I'll report back if I get anywhere with it.

Dan (UK)
I see you have managed to make a converter to interface with a Curtis 1228 controller. I have been trying to reprogram one of these for a few weeks now on my Wife's Mobility scooter. I'm really not into electronics and got lost when everyone started talking about converting RS232 to TTL. Just making a serial cable to go to the 4 pin molex did not work of course. I just ordered a converter from Ebay an was wondering if you think that this would work for me "http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380248198003&ssPageNam e=STRK:MEWNX:IT".
I do have a serial port on my laptop and a USB to serial adapter as well.
I would apreciate any feedback you would be willing to supply.
Thanks
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Unread 10-18-2010, 01:43 PM   #148
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Default Re: Programming Curtis Controller

I believe I added an image before, but was unable to find it.

Here it is again.



With the serial to TTL you are almost there.
You only need to add one chip sn74LS04 to invert the TTL signals.

Remember, TX from the PC goes to RX on the controller and vv.

Regards,

Edwin
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Unread 10-18-2010, 03:03 PM   #149
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Default Re: Programming Curtis Controller

Quote:
Originally Posted by satfrx View Post
I believe I added an image before, but was unable to find it.

Here it is again.



With the serial to TTL you are almost there.
You only need to add one chip sn74LS04 to invert the TTL signals.

Remember, TX from the PC goes to RX on the controller and vv.

Regards,

Edwin
Thanks
This clears things up a lot.
I guess I wasn't following the group when you posted the picture.
I think I even I can handle this level of wiring with such a clear diagram..........
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Unread 10-29-2010, 03:19 PM   #150
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Join Date: Jun 2009
Posts: 33
Default Re: Programming Curtis Controller

Hey Guys,

So I got my little fun box all wired up but I still can't connect. I just get Time out errors. The only thing is that Im using a serial to usb adapter...does that have anything to do with it. I have my box made up exactly to the spec with the Rs232 ttl converter, 5v regulator,etc

Tried flipping Tx and Rx wires but nothing. Any ideas?
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