The Valve_HMI links information to display to the operator on the HMI via a global object. This data type is an InOut parameter for AOI_ValveSolenoid, so the AOI has read/write privileges. We will pass the AOI the tag Valve_HMI which is a user-defined data type. For a solenoid valve, we will use an AOI from DMC’s internal Rockwell library called AOI_ValveSolenoid. Here at DMC, we use AOIs to improve code modularity and save time. The other two are for mapping inputs and outputs. One is an Add On Instruction or AOI in Device Control. There are three rungs total in this project.
I have also included a picture of controller tags to help explain some of the tag definitions. There are two programs in the MainTask: Inputs and Device Control. To keep the focus on emulation, we will use a simple PLC program for a solenoid valve.
We will explain the rationale for this latter. After clicking next, set the revision to 31 and put the controller in slot 2. When selecting a controller, select Emulate 5570 Studio 5000 Logix Emulate Controller. We will start in Studio 5000 Logix Designer and create a new project. Rockwell has more information on version compatibility. It is critically important to have compatible versions. This example will use Studio 5000 Logix Designer V31.01.00, FactoryTalk View Studio V10.00.00, Studio 5000 Logix Emulate V32.00.00, and RSLinx Classic V4.11.00. To emulate, you must have four applications. This blog will walk you through how to do so using Rockwell’s Studio 5000 and FactoryTalk VIEW ME. The solution I discovered was to use FactoryTalk Linx Gateway as an OPC-UA server, and add that server to the Ignition Gateway.Emulating a controller is a useful way to test PLC code and an HMI project when physical hardware is not available. It didn’t show any errors or indicate a problem, it just wouldn’t work. I could establish a connection with RSLinx Classic, but I couldn’t actually get any of the tags to show data. SoftLogix isn’t going to work for me, because I want to use v31 and SoftLogix will not support v31. I found some threads that said to use SoftLogix, because then the Logix driver would work, and some threads said they have had some success using RSLinx Classic. Of course, I turned to Google and YouTube to find a solution. You can’t just add a device and expect it to work. First of all, Studio5000 Emulate does not allow Ethernet IP communications and Ignition does not have a driver that works with Emulate. You would think that setting this up would be pretty straight forward, spoiler alert, it is not.
However, I don’t have a PAC on hand, but I could use the most recent emulator from Rockwell Automation. I recently wanted to create an Ignition SCADA to work with Allen Bradley’s ControlLogix Programmable Automation Controller (PAC).
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