Opto22 - Resources & Tools

Porting C# application onto GRV native linux

I have a c# application that is running on an embedded PC which uses the .NET SDK (the dll) from Opto22 to gather data from I/O processors such as the SNAP-PAC-EB2. This application then interfaces to a...more

SNAP-PAC TLS cipher list

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Is there a document that list of supported TLS ciphers on SNAP-PACs? I recently updated a reverse proxy I use for a web service (caddy) and now I am getting TLS handshake errors from the PAC. -2103 error...more

Cannot get I/O reference count to zero

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I’m transferring a control strategy from SNAP to EPIC. I am going from Control Pro 9.6 to 10.2. I added an EPIC I/O system, made new I/O points, and then replaced them from the SNAP to the EPIC. All...more

HTTP Post from String Table error 202

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Does anyone know what error 202 is? The error lookup says unknown, and the help file doesn’t list it either....

Node-red and Groov View Text Area

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Greetings, Is that possible using node-red Groov Write Node to write data from text file into Text Area Gadget in Groov View? So that the Text Area Gadget could display data on Groov View. Or there is another way to show text file on Groov View? Eg: ...

Use a Serial to USB Converter with groov EPIC

Videos - 12/4/2019

This video walks you through the steps needed to use a serial to USB converter with your groov EPIC PR1 controller. Use the USB ports on the groov EPIC PR1 controller to communicate with a serial RS-232, RS-484, or RS-485 device.

SNAP Enet toolkit install using cmd

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I am working on creating a batch file that executes numerous commands to set up a computer. I have the PAC Project MSI file for use in command prompt. But I am having trouble with the SNAP Ethernet IO...more

Open source is the future of automation

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Opto 22 speaks up for open-source software. For this month’s IoT feature in Design World magazine, Opto 22 had the chance to weigh in on the value that open-source software brings to industrial...more

Any plans for I2C support?

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Wondering if there are any plans for adding software I2C support to any existing epic modules, or any plans for a hardware I2C module? Or, maybe the shortest path to I2C would be an arduino or raspi...more

Find the IoT Certified OptoPartner you need

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Three more companies join the OptoPartner program to give you cutting-edge IIoT product solutions. Do you need help integrating, installing, or updating your Opto 22 system? An OptoPartner can help...more

Implementing audible alarms using text-to-speech

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Hi everyone. Here’s my challenge…We have 3 groov EPIC units in the plant controlling equipment. We have sirens and horns and such rigged up to sound off whenever there is an alarm condition, but...more

Updating & New Admin User Account

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Updating your Epic system from Opto Groov Manage website. Do you need to create a new Admin User Account every time you Update your Epic to the latest version? Or does the Update process clear out the existing Admin User Account?...

Flow to set PAC Control variables using CSV recipes

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If you’ve ever needed to quickly change an entire strategy’s worth of PAC Control tags back and forth between specific pre-set values, this post is for you! This flow takes tag “recipes” as comma...more

Javascript equivalent for ShiftNumTableElements

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I want to build an array in a Node Red function block, similar to the technique in PacControl using the command ShiftNumTableElements. I am reading a float variable from the S2 Controller, which...more

Can't add a recently created user to a group

Knowledge Base - KB87382 - 11/22/2019

In groov View, when you edit a recently created user, if you add them to a group through the Edit User dialog, the user is not added to the group.

Incorrect tag data from multiple Modbus devices

Knowledge Base - KB88635 - 11/22/2019

If you have a Modbus gateway device with multiple devices behind it, groov View may display tag values for only one of the devices, repeating those values on the other devices.

Changes to name or data type of tag not reflected in gadget

Knowledge Base - KB86468 - 11/22/2019

In groov View, if you change the name or data type of a tag and the tag is attached to a gadget, the name change is not propagated to the attached gadget's properties.

Connection or communication errors with Data Simulator and System Devices

Knowledge Base - KB88679 - 11/22/2019

In groov View, your project accesses gadgets configured with both Data Simulator and System tags at the same time (normally because they are on the same page), your project may fail to communicate or connect to either or both.

Length field in I/O Unit Tag editor always displays 0x10

Knowledge Base - KB88665 - 11/22/2019

In groov View, when you edit a previously configured tag, the Length field displays 0x10. It saves the value correctly, but displays the wrong value.

Strings in groov View may contain extra text at the end

Knowledge Base - KB88664 - 11/22/2019

After writing a string to an I/O Unit tag, if the newer string is shorter than the previous string, the end of the previous string may still be visible.

Important news for PAC Control users

Blog -

If you are using PAC Control with either SNAP PACs or groov EPIC, please be aware of an urgent bug fix related to how the control engine configures PID loops. The issue affects: SNAP PAC firmware R10...more

Gadgets show "could not connect to the controller" message

Knowledge Base - KB88663 - 11/22/2019

If your groov View project has an I/O Unit device and contains gadgets configured to access a memory map address that is not 4-byte aligned, after groov View tries to access that address, it displays...more

groov View: Mouse clicks might be ignored after page refresh

Knowledge Base - KB88581 - 11/22/2019

In groov View, mouse clicks are ignored after page refreshes.

Momentary button doesn't write Release Value to tag

Knowledge Base - KB88580 - 11/22/2019

In groov View, when you release a Momentary button, it writes a value (Release Value) that differs from when it was pressed (Press Value). However, if you navigate away from the current page, the Release Value is not written to the tag.

Event conditions in groov View -- any way to use a % value?

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Is there any way we can use a % value in the limit fields when setting up the event conditions in groov View? I my case, every few hours the tag being monitored (e.g. actual feedrate) changes. We...more