Opto22 - Resources & Tools

Case Study: Plant Extraction OEM Brings Control Systems In-House

Documents - 2445 - 11/20/2025

View in HTML Plant extraction is the process of separating useful compounds from plant material, relying heavily on temperature control, which is even more critical for cannabis where precise chilling...more

Your Business Can Count on Opto 22

Documents - 2446 - 11/18/2025

After you have confirmed that Opto 22 technology is the right technical fit, read on to find out why companies like yours - and over 70% of the Fortune 100 - have trusted us for over 50 years as their long-term business partner.

Privilege escalation vulnerability in groov View REST APIs may expose API keys of groov View admin users

Knowledge Base - KB91325 - 11/19/2025

A privilege escalation vulnerability in the groov View REST API may expose the API keys of admin user types to users with groov View Editor permission/privilege.

Vulnerability in groov Manage REST APIs may allow remote code execution

Knowledge Base - KB91326 - 11/19/2025

A remote code execution vulnerability in the groov Manage REST API could be exploited by an attacker if they obtain System-Wide Administrator permission. This vulnerability is described in CVE-2025-13087.

Computed Tags lose connection to OPC UA tags after restarting groov View

Knowledge Base - KB91038 - 11/20/2025

In your groov View project, if you assign an OPC UA tag as an input to a Computed Tag, the Computed Tag may lose the association with the OPC UA tag after restarting groov View.

groov RIO may not be able to access local I/O after booting up

Knowledge Base - KB91342 - 11/11/2025

Infrequently, a groov RIO unit may not be able to access its local I/O after booting up.

Emojis don't display on groov EPIC touchscreen

Knowledge Base - KB91335 - 11/19/2025

In groov View projects or in text fields in groov Manage, if you include an emoji character, when you view the page on your groov EPIC touchscreen, the character appears as a rectangle or empty box.

PAC Controller does not create all subdirectories on remote FTP server

Knowledge Base - KB91334 - 11/20/2025

In a PAC Control FTP communication handle, the controller should create all directories in a path. However, with this issue, the controller does not create the last directory listed in the path.

PAC Control "Convert Number to String Field" command incorrectly assigns asterisk to string variable

Knowledge Base - KB91298 - 11/19/2025

In PAC Control, the Convert Number to String Field command correctly assigns an asterisk to a string field when the length of the string field is smaller than the length needed. However, with this issue,...more

groov EPIC or RIO may not finish restarting if configured with port redirects

Knowledge Base - KB91297 - 11/19/2025

If you configured your groov EPIC processor or groov RIO module with port redirects, it may not finish booting up.

Unexpected behavior when stepping through a strategy

Knowledge Base - KB91284 - 11/19/2025

While debugging a PAC Control strategy running on a groov EPIC processor, when stepping line by line through a block that calls a subroutine, execution may continue out of order. When stepping over a...more

What is Machine Monitoring

Videos - 10/27/2025

In a factory setting, automation enhances speed and productivity. But, machine breakdowns can lead to significant downtime costs. This is where machine monitoring plays an important role...more

Switching between redundant Ethernet links may cause all digital output channels on a groov I/O module to turn on

Knowledge Base - KB91318 - 10/15/2025

If your strategy periodically turns on a digital output channel on a groov I/O module, and you have redundant Ethernet links (only available in PAC Control Professional) between an affected controller...more

Case Study: Automating Ecuador’s Largest Regional Water Project

Documents - 2444 - 10/9/2025

View in HTML When local leaders of Northern Ecuador commissioned a new regional water treatment plant to supply clean water to 300,000 people across five municipalities, the contractor knew that...more

POSTs to the SNAP PAC REST API may fail when the closing bracket is on a different line than the data

Knowledge Base - KB91226 - 10/8/2025

When attempting to send a POST to the SNAP PAC REST API, the POST may fail if the closing bracket is on a different line from the data.

Using 'Receive String Table' to read from a file may return -39 (timeout error)

Knowledge Base - KB91223 - 10/7/2025

Digital TPOs start operating upon I/O unit boot-up or after restart

Knowledge Base - KB91304 - 11/19/2025

After an I/O unit boots up or restarts, any I/O configurations that are stored in persistent memory are restored. If a TPO is restored, the TPO should not start controlling the digital output, but with this issue, it may.

Ignition gateway is restarted when it's already running

Knowledge Base - KB90793 - 10/1/2025

On the groov Manage Ignition page, if your selected platform is already running (you can see Running in the Status section) and you click Save, the platform is restarted (the gateway is...more

Tooltips appear incorrectly on graphics in PAC Display Runtime

Knowledge Base - KB91303 - 9/30/2025

When you hover your cursor over a graphic in PAC Display Runtime, you may see a tooltip appear in the wrong location with incorrect tag information, or a tooltip may not appear at all.

Attempting to download PAC Control strategy with redundancy fails

Knowledge Base - KB91152 - 9/30/2025

Case Study: Interlog Standardizes Solar Plant Monitoring Across Chile

Documents - 2443 - 9/9/2025

View in HTML Monitoring one solar plant is no small feat...so how about trying to monitor 30 of them scattered across 3,000 kilometers (1,864 miles), each with different hardware, software, and...more

Controller not reading in all characters of a file

Knowledge Base - KB91286 - 9/30/2025

On a SNAP-PAC-R1 (GEN2) controller, when you view the COM handle value through the Inspect dialog, it may show a smaller value of characters left to read than the actual number. When trying to...more

Filename from string tag may fail for trigger-based event in PAC Display

Knowledge Base - KB57406 - 5/23/2007

If a trigger-based event (such as a recipe or a historic data log) is configured to obtain a filename from a string tag in a PAC Control strategy, the filename retrieval may fail.

‘Find and Replace’ tool in PAC Control may not work correctly in OptoScript blocks

Knowledge Base - KB57575 - 5/23/2007

The Find and Replace function in PAC Control does not work correctly for OptoScript blocks. From the Find and Replace window, the Replace All button may cause the application to lock up or place the...more

In Ignition, dragging a tag into the Tag Browser changes status to Uncertain_LastKnownValue

Knowledge Base - KB91274 - 8/21/2025

In Ignition, when you drag a tag with a known good quality to the Tag Browser, the quality of the tag may change to Uncertain_LastKnownValue.