Answer the following statement(s) true (T) or false (F)
1. Function block programming is one of the languages that IEC 61131-3 specifies.
2. An IREF can be a tag or a number.
3. Tags must be used in OREFs.
4. Each OREF must also have at least one corresponding IREF.
5. Function block diagram (FBD) programming is one of the IEC 61131-3 languages
1. True
2. True
3. True
4. False
5. True
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