IEC оператор для операции вычитания.
Разрешенные типы данных:
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 (LDT)
TIME - TIME = TIMELTIME - LTIME = LTIME
DATE - DATE = TIMELDATE - LDATE = LTIMETOD - TIME = TODLTOD - LTIME = LTODTOD - TOD = TIMELTOD - LTOD = LTIMEDT - TIME = DTLDT - LTIME = LDTDT - DT = TIMELDT - LDT = LTIME