Hello everyone, I'm trying to write a tag from the designer, and I'm encountering this error. The connection to the PLC is good, and there don't seem to be any issues with that. Any suggestions for a fix? Thanks.
- What makes you think there are no issues with the PLC connection?
- What type of tag? OPC?
- Can you read the tag in Tag Browser?
- What is the tag's Quality value?
- Can you write to the tag in Designer's Tag Browser? (You need Full read/write gateway communication allowed" on the Designer toolbar.)
- When you got the error was it as a result of trying to write to the tag in the Tag Browser or was it generated by a script?
Tip: screengrabs are usually better than screen photos. Crop them properly!
OPC Tag
i can read the tag in tag browser
the quality is good
im in read/write mode
it is result of trying to write to the tag from tag browser
thanks!!
- Is the tag's CanWrite property enabled?
- What type of PLC.
- What is the datatype in the PLC?
- What is the OPC tag datatype?
- What value are you trying to write?
- Does the PLC have a configuration to enable/disable tag writes?
2 Likes
- Is enabled
- AllenBradley ControlLogix L72
- Boolean
- Ignition OPC-UA Server
- True
In previous days, this error didnt appear; the error persists
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Show the OPC Item Path in Ignition.
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Show that location in the PLC's Controller Tags, expanding the tree as needed, and showing the External Access column.