NI-9871 (RS485) with cDAQ?

[Slyfer]

Hi,

I am using NI-9178 cDAQ (also the 9174 with 4 slots), with some C module, namely some digital I/Os and one analog output.

It is used in the functional test of an electronic device.

This device under test (DUT) has also a serial port that uses RS485 2-wire + Modbus ASCII protocol.

My questions are:

1) can I use the NI-9871 with cDAQ to communicate (sending and receive modbus ASCII commands) with DUT??

2) is NI-9871 usable only with cRIO ? in that case how much additional programming effort require? should I program the cRIO FPGA?!

thanks

[MarcoMar]

Hi!!
NI-9871 is module designed for serial communication under RS485/RS422 protocol, so you can use it to communicate with any compatible devices  with RS485/RS422.

You can find the module manual at the following link:
http://digital.ni.com/manuals.nsf/websearch/67F50E6440D4510E862574B800535963

You can find more about C-series module compatibility at the following link:

 http://zone.ni.com/devzone/cda/tut/p/id/8136

Bye!

[Seth_B.]

To clarify,  at this time none of the Serial, CAN, or Motion modules are compatibile with any of the cDAQ chassis.  They can only be used with CompactRIO chassis using LabVIEW FPGA programming.

Regards,