slc 500 ni4 0-10vdc to 4-20ma conversion

[kphilman]

Hey guys,

I need to do a 0-10vdc to 4-20ma conversion using an allen-bradley NI4 analog card can anyone help I have to give an analog output to a toshiba inverter

 

[504bloke]

I dont quite understand, you will also need an Output card to give the 0-10 to the toshiba ?

Do you want to take a 4-20 into the PLC and then drive 0-10 from the PLC to the toshiba ?

 

[kphilman]

yeah you have got it I done this a while back and my brain has gone blank

 

[Mickey]

kphilman,
Tell us the which SLC500 you have, SLC5/01,SLC5/02,SLC5/03,SLC5/04,SLC5/05?
Also cat. no. of analog input card and output card. (The whole no.)
The more info the better.

 

[504bloke]

Ok well lets presume you have an NO4V card as well as the NI4 card

My example is for a 5/03 OS302 processor (or above) using the SCP command, if your processor is below this (ie 5/02 or 5/01) then this will not work as i have used the SCP instruction.

The manual for the NI4 and NO4V can be found here

The DIP switches will need setting up see the manual.

The NI4 on 4-20mA input gives 3277 - 16384

while the NO4V needs 0 - 32764 to give 0-10V output.

Slot 0 - 5/03 OS302
Slot 1 - NI4 Input Card Channel 0 configured for 4-20mA
Slot 2 - NO4V Output Card

You will only need rung 0002 but i have also included range error flags.

DISCLAIMER: This is UNTESTED!

 

[kphilman]

thanks man that helps alot it refreshed my memory