Opto22 - Resources & Tools

Opto Groov Manage API - Set Counter Value

I’m working with an Opto Groov controller with a Digital Input with Quadrature module attached to it. I have the feature set to Counter and would like to be able to Set the value of that counter via the...more

Activating Your groov EPIC Processor

Documents - 2312 - 10/27/2020

This document comes in the box with your groov EPIC processor (GRV-EPIC-PR1 or GRV-EPIC-PR2). It shows you how to activate your groov EPIC processor with the latest firmware after you have...more

Output sinewave via 0-10v analog output

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This might be silly, but I wonder, If I create a program in groov pac control that outputs a sine wave 0-10V via one of analog output channel that will run continuously , would I wear the output module or cpu?...

PAC Control Digital Input: Allow Write Capability disabled?

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Hey all, I’m using a Digital Input channel on a GRV-MM1001 module to monitor for a button press, with the intention of reading the Onlatch from an OPC tag and clearing it after read. When trying to do...more

Version Compatibility?

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If I have an older controller with a strategy file on it that I want to pull from the controller to my computer, do I need to have my version of PAC Manager match the firmware version or the version of...more

Best Practices for Securing PAC Control Systems?

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Hi all, I’m currently working on a PAC Project-based setup and was wondering what steps others here take to secure their control systems. We’re using PAC Control and PAC Display in a small industrial...more

During EPIC boot up, GRV-OVMAILP-8 voltage outputs may not be at zero volts

Knowledge Base - KB91176 - 5/16/2025

When a groov EPIC unit with a GRV-OVMAILP-8 module is booting up or when the module is hot swapped, any channels configured as a voltage output may output a non-zero voltage for a few seconds.

Any way to restore file

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I need assistance regarding a SNAP-PAC-R1 controller that has stopped responding through the RS-232 serial port after being disconnected from the power supply for an extended period (+4 years). Issue...more

Groov Manage White Screen when switch from Groov View to Groov Manage in Build Mode

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image851×720 16.5 KB How to fix this problem except restarting EPIC by hand, because I am not nearby the project Site. I cannot find way to restart EPIC in Build Mode...

How toPass Groov view Tags from Siemens Device to PAC to Code

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Groov view as a web server, and pac in Epic as a Core Controller. In EPIC, I Create Tags Read from such as OPC UA, Modbus Devices, Pac in EPIC…, My question is how could I pass these Tags to Pac in Epic to Code....

Kiosk Automatic Login URL to Open GrooV View

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May I Login URL with name and password, I would rather go straight to Open GrooV View automaticlly....

Issue with PAC Display not updating tags in real time

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Hi everyone, I’m working with PAC Display and noticed that some of my tag values aren’t updating in real time—they only refresh when I reopen the screen. The strategy is running fine in PAC Control...more

Multiple connections using same client ID to MQTT broker are closed

Knowledge Base - KB91163 - 5/3/2025

Access to SNAP-R1 Firmware 10.4

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We have a fresh out of the package Gen1 SNAP-PAC-R1. When we attempt to update the firmware to the latest version (10.5g) available from the website, the updater fails with an “incompatible hardware...more

Warning messages repeated from apt-get update command

Knowledge Base - KB90935 - 5/20/2025

SNAP analog input modules using R2.0a firmware may not operate normally

Knowledge Base - KB91167 - 5/21/2025

An impacted SNAP analog input module running the R2.0a firmware version may no longer appear in PAC Manager and may not operate normally.

Consecutive variable imports via .csv files crashes PAC Control

Knowledge Base - KB91101 - 5/1/2025

When attempting another variable import after a successful variable import using comma-separated values (.csv) files, PAC Control may crash.

Random OptoOPCServer errors and/or PAC Display Runtime crashes

Knowledge Base - KB91057 - 5/1/2025

You may experience random errors in OptoOPCServer and/or OPC clients. When using PAC Display Runtime, you may experience random errors in both programs, and PAC Display Runtime may crash with the error...more

Inaccurate status information in PAC Control for I/O units configured for redundant networking

Knowledge Base - KB91042 - 5/1/2025

When inspecting I/O units configured for redundant networks in Debug mode in PAC Control Professional, the Address section on the Information tab of the Inspect dialog box may not accurately show the current network status.

URL command to start Flow in Node-Red

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Hello everyone, I have this Node-Red flow and I want to start it with URL. How can I do it? I try this ULR: https://192.168.12.33/node-red/set_daq_stop; https://192.168.12.33/node-red/cmd/set_daq_stop...more

EPIC or RIO users with "Do Not Expire" option are logged off

Knowledge Base - KB91169 - 5/21/2025

Case Study: Preventing a Data Center Shutdown

Documents - 2437 - 4/21/2025

View in HTML After an HVAC retrofit in 2022, the headquarters of a nationwide bank in Australia encountered an unplanned shutdown of their data center, which was critical to their banking operations...more

Json to excel from one system to another

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hey , currently I am managing opencore dashboard from machine A and I have installed openrpa in machine 2 . I trigger workflows from machine A which runs on machine B . now the solution or idea I need...more

Ignition access to serial ports

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I am trying to access the serial ports from Ignition running on the Epic. I have tried both the usb ports AND the serial module on slot 3. image918×879 28.7 KB I only ever get an error about not able to open the port. Any advice?...

Some full-feature groov I/O modules may disrupt communication with groov I/O simple and serial modules

Knowledge Base - KB91168 - 4/17/2025

If an affected groov I/O module is inserted in one of the first five slots (positions 0 through 4) of the chassis, groov simple modules in positions 0 through 7 and groov serial modules (only supported...more