PLC glossary
Instance
The separate storage used by one timer or reusable block. Sharing the design does not mean sharing every machine's remembered values.
- Also called
- instance data, backing tag
- On site
- The duty and spare pumps have separate memory even though they use the same control block.
- Siemens
- Static timer instances; FB instances have instance data blocks or multi-instance storage.
- Rockwell
- Instruction backing tags and separate AOI instance tags.