Resources & Tools

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Celebrating 50 Years of Opto 22
Videos - Published:
Happy 50 year anniversary to Opto 22! Follow along on this 5 decade journey to see what products started it all and how far technology has come.
Case Study: Varland Plating Upgrades 30-Year-Old Legacy System
Documents - 2423 - Published:
View in HTML Based in Cincinnati, Ohio, Varland Plating has been specializing in providing high quality, precision barrel plated finishes to their customers since 1946. For years, Varland manually...more
Case Study: Open-Source Platform Supports OEM Integration
Documents - 2421 - Published:
Gurtler Industries, a third-generation family business based in the United States Midwest, remains a leading provider of laundry chemical products, services, and support for many industries including...more
Obsolete G4 Digital Dry Contact Output Modules Technical Note
Documents - 2413 - Published:
This technical note contains information you may need about obsolete G4 Digital Dry Contact Output modules you’re still using. Included are part numbers, descriptions, specifications, wiring...more
Obsolete G4 Digital DC Output Modules Technical Note
Documents - 2413 - Published:
This technical note contains information you may need about obsolete G4 Digital DC Output modules you’re still using. Included are part numbers, descriptions, specifications, wiring diagrams...more
Obsolete G4 Digital AC Output Modules Technical Note
Documents - 2413 - Published:
This technical note contains information you may need about obsolete G4 Digital AC Output modules you’re still using. Included are part numbers, descriptions, specifications, wiring diagrams...more
Some channels not set to zero on groov RIO EMU module
Knowledge Base - KB90881 - Published:
If you modify the default minimum threshold values for Minimum Voltage Threshold Ratio, Minimum Current Threshold, or Power Creep Adjustment (power threshold), if the threshold is not met for a phase...more
Case Study: Streamlining Alarm Management at Cambrex
Documents - 2422 - Published:
View in HTML Over the last 40 years, Cambrex has been a leading contract development and manufacturing organization (CDMO) with more than a dozen global locations. They deliver drug substance, drug...more
Generate N Pulses with N set to 0 starts a TPO when using groov I/O
Knowledge Base - KB90786 - Published:
In your PAC Control strategy, if 0 is specified for the Number of Pulses parameter of the Generate N Pulses command, then no TPO pulses should be started. However, groov I/O incorrectly treats a 0 as a signal to start TPO pulses.
PAC Control COM handle with ‘b’ to open a file fails with -6 error code
Knowledge Base - KB90874 - Published:
On your groov EPIC processor, if you have a PAC Control strategy that uses a communication handle (COM variable) to open a file that specifies b for the mode, the open fails with a -6 (Invalid Data Field) error.
User with Node-RED Dashboard UI permission prevents other users from making requests to PAC Control REST APIs
Knowledge Base - KB90739 - Published:
A message that normally indicates you are using an invalid API key can also indicate you have this issue: any users with the Node-RED Dashboard UI permission on your groov EPIC processor prevents other...more
After viewing the Data Service page on EPIC touchscreen or external display, groov Manage becomes unusable
Knowledge Base - KB90783 - Published:
If you view the Data Service Status page from either the touchscreen or an external HDMI display, the groov Manage pages look and behave strangely: the navigation is misplaced and pages start to merge together.
When downloading "Support Download" file, contents may be truncated
Knowledge Base - KB90833 - Published:
When you click Download from the Download Support Info page (from the groov Manage Home page, click Info and Help > Support Download), the contents from the generated may be truncated if there are...more
Status fields on groov Manage pages might display explosion/collision emoji characters
Knowledge Base - KB90837 - Published:
The Status field in several groov Manage pages typically displays text, like Enabled or Running. With this issue, a Status field may occasionally display collision/explosion emojis (💥).
Data Services OPC UA server may not report new values after PAC Control strategy download or I/O reconfiguration
Knowledge Base - KB90892 - Published:
After downloading a PAC Control strategy or reconfiguring I/O or modifying Scratchpad values, you may observe—in your OPC UA client—that data reported by the Data Services OPC UA server...more
Tags deleted/modified on groov EPIC/RIO continue to show valid value in OPC UA client
Knowledge Base - KB90875 - Published:
When you delete or modify tags, the Data Service's OPC UA server should report these tags as "bad" quality. However, with this issue, the Data Services OPC UA server may still report a valid value.
MQTT and OPC UA may display a variety of symptoms due to scan/communication timeout
Knowledge Base - KB90789 - Published:
You may have this issue if you observe the following behaviors: MQTT with Sparkplug payloads publish a Sparkplug Device Death followed by a Device Birth on the OptoMMP device; MQTT with String...more
OPC UA tag browsing may time out when opening folders with large number of tags
Knowledge Base - KB90870 - Published:
While browsing through tag folders from an OPC UA catalog, if you click on a folder with such a large number of tags (may be more than thousands) that a read timeout is exceeded and the browser may remain stuck, displaying Retrying on that folder.
New SSL port configuration method in R4.5a for groov Server for Windows
Knowledge Base - KB90708 - Published:
This is an informational KB article. groov Server for Windows is behaving correctly. If you configured groov Server for Windows to run on a custom SSL port, you may notice it running on the default port 443 after upgrading to R4.5a or higher.
Database error when modifying a user in groov View Build mode
Knowledge Base - KB90856 - Published:
When attempting to modify an existing user in groov View Build mode, you may encounter the following error message: “Error: There was a database error when updating the user.” Your changes are not applied.
groov View Momentary Button may not work on a Windows device with a touch screen
Knowledge Base - K90818 - Published:
When you attempt to use a groov View Momentary Button on a Windows device with a touchscreen while in View mode, you may encounter a context menu appearing instead of the button being activated.
Changing the Page menu display results in an empty page when viewed on the EPIC touchscreen or external HDMI monitor
Knowledge Base - KB90805 - Published:
When choosing to display the Page menu as a folder tree in the Project Settings panel in groov View Build mode, you may encounter an empty page when viewing the project on the groov EPIC touchscreen or...more
Using groov View Build mode from an external HDMI monitor connected to groov EPIC devices may cause application to hang
Knowledge Base - KB90804 - Published:
When attempting to use groov View Build mode from an external HDMI monitor connected to groov EPIC processors, the application may hang while displaying “Loading pages…”. Note...more