Operator ‘SUB’¶

The IEC operator subtracts variables.

Permitted data types: BYTE, WORD, DWORD, LWORD, SINT, USINT, INT, UINT, DINT, UDINT, LINT, ULINT, REAL, LREAL, TIME, LTIME, TIME_OF_DAY (TOD), LTIME_OF_DAY (LTOD), DATE, LDATE, DATE_AND_TIME (DT) LDATE_AND_TIME (DT)

Possible combinations for time data types:

• TIME - TIME = TIME
• LTIME - LTIME = LTIME

Possible combinations for date and time data types:

• DATE - DATE = TIME
• LDATE - LDATE = LTIME
• TOD - TIME = TOD
• LTOD - LTIME = LTOD
• TOD - TOD = TIME
• LTOD - LTOD = LTIME
• DT - TIME = DT
• LDT - LTIME = LDT
• DT - DT = TIME
• LDT - LDT = LTIME