使用恒定掃描時基模式的一個原因是可以保證V0在恒定時間間隔內(nèi)被更新。另一個原因是保證輸出掃描和下次掃描的輸人掃描之間有一定量的時間間隔,使從程序中接收輸出數(shù)據(jù)后接收輸入信號。如果在掃描完成前恒定掃描定時器計滿，則包括窗口在內(nèi)的整個掃描便完成。不過,在下次掃描開始時會記錄一個重疊掃描錯誤。

Sanki PFC-110AN Feeding System Controller

419231-01B Keypad W/ Display

Modicon PC-0984-680 Programmable Controller

IWATSU IX-16PSUB 16 Port Station Circuit Board

Mitel 9400-300-312NA Control Resource III Card

Mitel MC312AB Peripheral Switch Controller II

GE Fanuc IC610CHS130A Rack W/ Hi Cap Power Supply/10

466482 00 Circuit Board

Modicon AS-H827-209 Primary Rack 11Slot

PB235501 E.S. Controller Board

PB228602 Omega Expansion System

PB1742-04 Combination Interface Board

Lucent PWPQAEDAAA Power Unit 430 AB S1:1

JC Systems C83240-188 Dual Setpoint Programmer

Pelco VA-112 Sequential Switcher

Adept 87A243 8A840/4727 Motor Encoder

Robicon 463990.01 REV M Power Interface Control Board

Polyspede PRD8 E1511E-02 Driver Board

Protection Controls M2101 Protectofier Flame Safety U

Lot of 5 Allen-Bradley 1305-BA06A Micro Drives 380-480V

Lot of 74 Opto 22 G4 0DC5 Output Modules 60VDC 3A

Habermann 1445-0015-00000 Transformer PRI:400/470V SEC:

Habermann 1372-0107-00000 Transformer PRI:230V SEC:20V