PLC-5/250: address mnemonics
Address mnemonics let you address members at the word or bit level according to their names. The available address mnemonics depend on the type of data (timer, counter, or control) and the program instruction that you want to address.
The following table shows some address mnemonics.
Instruction Type: | Data Type: | Word Level: | Bit Level: |
|---|---|---|---|
Bit Shift
BSL, BSR | R (control) | length (.LEN)
position (.POS) | enable (.EN)
error (.ER)
done (.DN)
unload (.UN) |
Block Transfer
BTR, BTW | BR (read control)
BW (write control) | done size (.DLEN)
request size (.PLEN)
error code (.EC)
time out (.TOUT)
file number (.FILE)
file index (.IDX) | enable (.EN)
start (.ST)
continuous (.CO)
enable wait (.EW)
synchronous done (.DN)
synchronous error (.ER)
asynchronous done (.AD)
asynchronous error (.AE) |
Counter
CTD, CTU | C (counter) | preset (.PRE)
accumulated (.ACC) | count up (.CU)
count down (.CD)
done (.DN)
overflow (.OV)
underflow (.UN) |
Diagnostic
DDT, FBC | R (control) | length (.LEN)
position (.POS) | enable (.EN)
error (.ER)
done (.DN)
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