How to control Solenoid valves with TC-32 in labVIEW

[Vishank Battar]

Hello,

I would like to use my TC-32 board to send digital outputs to a solid state relay rack to actuate a solenoid valve. However, I don't know how to send digital outputs from the TC-32 board, and I can't find useful blocks in the MCC user library in LabVIEW for controlling digital outputs. Does anybody know how to send digital outputs from the TC-32 board, or has anybody controlled solenoid valves with the TC-32 before?

 

Thank you.

[Fausto]

Hello @Vishank Battar.

To send a digital output signal from a TC-32, take a look at the 'Generate Values.llb' file, in the '\National Instruments\LabVIEW {version}\examples\ULx\Digital' folder, which is included with MCC's ULx for NI LabVIEW installation.

Select the 'ULx Write Dig Chan.vi' example.

 

When the example opens, you will need to change the 'Lines' field in the Channel Parameters.  Click on the down menu arrow and select 'Browse'.

 

Referencing MCC's Universal Library (UL) Help file (https://www.mccdaq.com/pdfs/manuals/Mcculw_WebHelp/ULStart.htm), it shows the TC-32's Port I/O with the output PortNum to be 'FIRSTPORTB', but a PortType of 'FIRSTPORTA' for Bit I/O.  If the list of channel options in the example only show 'Dev0/1stPortA/...', then the supported 32 digital output bits range from bits 8 thru 39, with 8 being digital output bit 0.  However, if the channel options show both 'Dev0/1stPortA/...' and 'Dev0/1stPortB/...', then 'Dev0/1stPortB/Do0' is digital output 0.  

 

Table 21 in the TC-32 User's Guide (https://www.mccdaq.com/pdfs/manuals/TC-32.pdf) shows pin 1 as digital output 0 (DOUT0).

 

With this example, you will need to remove the additional bit elements to test just the digital output 0 channel.

 

With regards to controlling a solenoid using a digital output channel, please reference the 'Digital Outputs/Temperature Alarms' section beginning on page 14 of the TC-32 User's Guide.  Take a look at Figure 7 which shows an example of controlling a relay.

 

Regards,

Fausto

[Vishank Battar]

On 1/23/2023 at 11:59 AM, Fausto said:

Hello @Vishank Battar.

To send a digital output signal from a TC-32, take a look at the 'Generate Values.llb' file, in the '\National Instruments\LabVIEW {version}\examples\ULx\Digital' folder, which is included with MCC's ULx for NI LabVIEW installation.

Select the 'ULx Write Dig Chan.vi' example.

 

When the example opens, you will need to change the 'Lines' field in the Channel Parameters.  Click on the down menu arrow and select 'Browse'.

 

Referencing MCC's Universal Library (UL) Help file (https://www.mccdaq.com/pdfs/manuals/Mcculw_WebHelp/ULStart.htm), it shows the TC-32's Port I/O with the output PortNum to be 'FIRSTPORTB', but a PortType of 'FIRSTPORTA' for Bit I/O.  If the list of channel options in the example only show 'Dev0/1stPortA/...', then the supported 32 digital output bits range from bits 8 thru 39, with 8 being digital output bit 0.  However, if the channel options show both 'Dev0/1stPortA/...' and 'Dev0/1stPortB/...', then 'Dev0/1stPortB/Do0' is digital output 0.  

 

Table 21 in the TC-32 User's Guide (https://www.mccdaq.com/pdfs/manuals/TC-32.pdf) shows pin 1 as digital output 0 (DOUT0).

 

With this example, you will need to remove the additional bit elements to test just the digital output 0 channel.

 

With regards to controlling a solenoid using a digital output channel, please reference the 'Digital Outputs/Temperature Alarms' section beginning on page 14 of the TC-32 User's Guide.  Take a look at Figure 7 which shows an example of controlling a relay.

 

Regards,

Fausto

I am running into this error. How do you suggest I go around this?

[Fausto]

The error message states 8 channels in the data and you only selected one channel (Do8) from the Channel Parameters list.

Did you delete the additional bit elements (1-7) or just hide them?

The screen capture below shows bits 3-7 as faded, which indicates a deleted/inactive state.  Right click on the Boolean switch and then select Data Operations - Delete Element.  Delete bits 1-7 and then retest the vi example.

 

 

[Russ2010]

This is adding to what is above. Running into the same issue. I do think I have the alarms turned off but still can to seem to get. I can run the labview code with no errors popping up. When I measure with a DMM the output is active is 0VDC  and when I turn it off it still remains 0VDC.  I did set up Do0 through DO7 the same way. per the attached picture. Do i have the setting right? for labview to control the outputs?