153
3) Suitable soft components
*Notes: D includes D, HD; TD includes TD, HTD; CD includes CD, HCD, HSCD, HSD; DM
includes DM, DHM; DS includes DS, DHS. M includes M, HM, SM; S includes S, HS; T
includes T, HT; C includes C, HC.
If source data is not BCD code, SM409 will be ON (Operation error), SD409=4 (error
occurs).
As constant K automatically converts to binary, so it’s not suitable for this instruction.
For example: all the information stored in the clock information register SD13~SD19 of PLC
is BCD code, but we are used to using decimal value. The time information can be converted
from BCD code information to binary:
Source (BCD) → destination (BIN)
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