ADD

The IEC operator adds variables.

Allowed data types: __UXINT, __XINT, __XWORD, BYTE, DATE, DATE_AND_TIME, DINT, DT, DWORD, INT, LDATE, LDATE_AND_TIME, LDT, LINT, LREAL, LTIME, LTOD, LWORD, REAL, SINT, TIME, TIME_OF_DAY, TOD, UDINT, UINT, ULINT, USINT, WORD

Possible combinations for time data types:

• TIME  + TIME   = TIME
• TIME  + LTIME  = LTIME
• LTIME + LTIME  = LTIME

Possible combinations for date and time data types:

• TOD  + TIME   = TOD
• DT   + TIME   = DT
• TOD  + LTIME  = LTOD
• DT   + LTIME  = LDT
• LTOD + TIME   = LTOD
• LDT  + LTIME  = LDT
• LTOD + LTIME  = LTOD
• LDT  + LTIME  = LDT

Special feature in the FBD/LD editor: You can extend the ADD operator with function block inputs. The number of additional function block inputs is limited.

Samples:

ST:

nVar := 7+2+4+7;

FBD: