How to write to registers on the Watlow SD Controller

[lwdugas]

I am having difficulty writing a packet to my Watlow SD controller.  I can read any register with no problems, but when it comes to writing to a register I haven't been able to figure it out.  The entire package I have been using is included in the zip file along with the modbus format used by the watlow.  If anyone could explain this to me I would greatly appreciate.   This is my first attempt at Modbus.  The drived in the .zip are downloaded from the Watlow website.

[Mr.F]

I took a look at your program and it appears that you wrote a lot of this code from scratch. Have you taken a look at the Modbus library available for download? It can be found here:

https://forums.ni.com/t5/Reference-Design-Content/LabVIEW-Modbus-API/ta-p/3524019

[Watlow]

Please contact us at our Watlow technical support number of 507-494-5656. Ask for Randy.