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TOPIC: Reading/Writing Holding Registers

Reading/Writing Holding Registers 5 months 1 week ago #1293

  • Wolfgang
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I have some questions about data flow control:
1. I suggest only tags actual needed on a screen are red. Right?
1.a. if so how can I force a update independent from screens.
2. I suggest a tag is written only if the value changes. Right?
2.1. If I write a modbus tag in a script, will this tag written to plc independend of value change?
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Reading/Writing Holding Registers 5 months 1 week ago #1294

  • fatkhrus
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Hello,
1.Yes, tags only bind to objects on current screen are read. You can force read of tag if you Enable alarms or Enable History for tag. Also it's possible if you use tag in General type script.
2. No, you can write value manually if value is the same. You can write value to PLC independent of the value change or not by using script.

Best regards,
Ruslan
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Reading/Writing Holding Registers 4 months 4 weeks ago #1299

  • fatkhrus
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In the new version (2.41) we've implemented possibility to write value into the tag independently of the value changing if you check "Output differs" in Tag settings.

Best regards,
Ruslan
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