09-04-2014 06:36 AM
Hey,
We are working on a project including a power supply (with an RS232 interface card), a cRIO 9024 and the RS232 Serial Module 9870.
It is possible to read values from the power supply via those components but writing new values to the power supply is terminating the connection to the cRIO. (without any error message, just a lost connection)
The used drivers are working properly (reading and writing) if we connect the power source directly to the RS232 port of a Computer running Windows.
Are there any diffrences between the 9870 RS232 Port on the C Series Modules and the PC Port which we should know of?
Or are there any Software based diffrences which could cause this error?
Best regards,
Chris
09-04-2014 10:37 AM
Did you connect an isolated DC supply to the 9870?
09-04-2014 10:52 AM
I connected it to the same 24V supply which serves as the power supply for the cRIO.
It's this one: http://www.block.eu/en_US/products/power_supplies/product/2359334/
Do you think thats a sufficient method?
Best regards and thanks so much for your help
Chris
09-04-2014 11:21 AM
@ChristophBielefeld wrote:
I connected it to the same 24V supply which serves as the power supply for the cRIO.
It's this one: http://www.block.eu/en_US/products/power_supplies/product/2359334/
Which one? There's 13 options there. I'd have to look at the specs for the cRIO and the module, but you could be hitting the current limit of your power supply.
09-04-2014 12:37 PM - edited 09-04-2014 12:39 PM
oh I'm sorry for the inconvenience.
it's this one PVSE 230/24-5
thanks so much 🙂
strange thing is that the reading of values at the (controlled) target power supply the (EA-PS 8080 120 U) works just fine. Just the writing of setpoint doesn't.
09-04-2014 03:16 PM
Suggest you double check your connections between 9870 and power supply. Handshake lines?
09-05-2014 03:13 AM
09-11-2014 05:43 AM
09-11-2014 06:38 AM
Chris,
Only thing I can think of is a small experiement using a separate DC supply to power the 9870 module. Wondering if any of the symptoms will change.
10-07-2014 06:16 AM
Hey,
we tried the different DC supply but it didn't make any difference. Still the same problem.
cRIO error protocol shows:
<DEBUG_OUTPUT>
10/07/14 12:50:38.590 PM
DAbort 0xDAAD3994: ConvertNum called with Empty Data
source/NumericSupport.cpp(88) : DAbort 0xDAAD3994: ConvertNum called with Empty Data
does this have anything to do with our problem?
Thanks for your support 🙂