Comments (5)
I would say yes. Write your own function that performs a read based upon the scan rate timeout you wish to have.
from node-ethernet-ip.
I meant natively rather than using setInterval to perform individual reads, which is less efficient than subscriptions.
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I wouldn't use a setInterval. track the last time each tag was read and then get the oldest one most needing to be read. Add several to a tag group and read the tag group is also an option. A feature request for this library may be to add a scan rate to tag groups.
while( true ) {
await getNextTagThatIsAgedEnough()
await readThatTag()
await extraDelayWhenNoTags()
}
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A feature request for this library may be to add a scan rate to tag groups.
Great idea. Appreciate your insight.
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I always just read tag groups in a loop with a delay, similar to what Nate shows. But I do end up setting up different controllers for each tag group and even run each controller on its own server. Usually 4 total for my standard HMI framework. But some of that may be specific for my application.
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Related Issues (20)
- Class1 Implicit message
- TCP connection leaking on closing connection HOT 1
- Add an option to configure the timeout of "Unconnected Send" messages HOT 1
- Changed Event is missed for previously written tags
- Waht is the max Size of a TagGroup? HOT 2
- Decimal precision is not correct HOT 4
- Question: Can I get tag descriptions? HOT 3
- High PLC CPU utilization and large number of connection errors. HOT 14
- Can't Read Tag by using attribute ID HOT 1
- Error: TIMEOUT occurred while reading Controller Props. - Micrologix 1100 HOT 5
- tag.generateReadMessageRequest is not a function
- Error connecting to PLC: Error: TIMEOUT occurred while reading Controller Props. HOT 4
- Is this Project Still Maintained? HOT 4
- Preferred disconnection or unsubscribe method?
- String Tags in Compact Logix / Control Logix HOT 1
- Micro820 PLC , Error: <SCAN_GROUP> TIMEOUT occurred while writing Reading Tag Group HOT 1
- PLC.foreach() doesn't work HOT 1
- Software name HOT 1
- Micro Queue is already full at size of 100 HOT 2
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