How do I send a zero command over Profibus using a HI 3030?

We have a Hardy HI 3030 weigh controller that was provided as part of a system from an OEM. I need to zero two of the three scales that are connected to it by issuing a command over Profibus (optional communications module is installed). How do I send a zero command over Profibus using a HI 3030? Also, where can I find the Profibus GSD file since this unit shows up in my hardware configuration as an Anybus device?

You can download the GSD file from the CD ROM sent with the controller or from the Hardy Process Solutions web link shown below. Your hardware configuration may still say Anybus Device, but functionality is the goal. Different PLC manufactures use the GSD files as they wish for third party devices.

Go to: http://www.hardysolutions.com/products/HI-3030-multi-scale-weight-controller

Select the 3000 model you are using and select the "DOCs and Programs" pull down

To send a ZERO command across Profibus you will need to access the built in web page of your HI 3030 using a PC with a crossover cable or both hooked into an Ethernet hub. There are examples to help perform this task in the HI 3000 series manual. The HI 3000 series manual contains all the information for communications set up. Using the Ethernet port and the configuration/mapping, You will map the destination using CONTROL pull down as a ZERO command (HO1.4) on the 1st mapping page.  Click on the jump to destination page button.  Then select the NETWORK pull down and a Profibus input type Boolean word and bit, (CI0.0, in this example is word 0 bit 0) and map.
HO1.4 = +CI0.0 appears in the equation.
And that translates to:
HO1.4(Zero 1 command) = +CI0.0(Comm. Network Boolean Input)  
Now when that first bit of the first word is transmitted from the host as a one.  If the scale is out of motion and the weight is within the accumulated AUTO zero tolerance parameter, the controller's gross weight will be zero. You will need to perform some programming in the PLC logic to send the ZERO command one time and then verify the Gross weight is indeed zero.

The conditions that allow the ZERO command to work are as follows.
1. The scale must be out of motion. This weight change verification takes a minimum of 1 second.
2. The Auto Zero Tolerance parameter is accumulative. The total amount of Gross weight zeroed cannot exceed this parameter setting.

You can download the above referenced manual at www.hardysolutions.com by selecting the controller in question.