在一個每次掃描都不調(diào)用的程序塊中使用OFDT,除非定時器復(fù)位，不然在程序塊內(nèi)的定時器計時。這意味著OFDT功能塊象–個比主程序塊中定時器掃描更慢的定時器一樣運行。對那些長時間的非活動的程序塊，對OFDT編程時應(yīng)該考慮到這種追趕特性。

Imperial Eastman Hydraulic Hose 1 1/2″ Diameter #23067

Imperial Eastman Hydraulic Hose 1 1/4″ Diameter #23069

Hydraulic Hose 1″ Diameter #23070

Markwel Hydraulic Hose 1/2″ Diameter #23072

Omron Temperature Controller E5C4-R40J, 50/60 Hz, 3 Amp

Heater Band A212971-01 #35886

Nemic-Lambda Power Supply PWB-79G #38269

Heater Band A213251-01 #35889

Heater Band A212961-01 #35892

Heater Band A212981-01 #35894

Heater Band A213273-01 #35895

Heater Band A213241-01 #35897

Heater Band A213262-01 #35901

Hubbell Watertight Receptacle 460R7W #36030

Legacy Grease Filler Pump and Guide L3065 #20470

Allen Bradley 1494V-DS30 Disconnect Switch #29336

Sharp JW-10PG Hand Held Programmer #23258

Warner Swasey 8100-0059 A Circuit Board #23242

Square D Interlock Safety Switch EK-300-1 #29768

Allen Bradley 16 Slot I/O Chassis 1771-A4B #29095

Parametrics PC Digital Board 600048E #23093

Numatics Valve 3SAD4O #13432

Caloritech TMC404336 Heat Element #18219

Caloritech TMC404327 Heat Element 1200 Watt #18220