6ES7231-7PB22-0XA8電機轉動起來，控制部會再根據驅動器設定的速度及加/減速率所組成的命令（Command）與hall-sensor信號變化的速度加以比對（或由軟件運算）再來決定由下一組（AH、BL或AH、CL或BH、CL或……）開關導通，以及導通時間長短。速度不夠則開長，速度過頭則減短，此部份工作就由PWM來完成。PWM是決定電機轉速快或慢的方式，如何產生這樣的PWM才是要達到較精準速度控制的核心。

  高轉速的速度控制必須考慮到系統的CLOCK分辨率是否足以掌握處理軟件指令的時間，另外對于hall-sensor信號變化的資料存取方式也影響到處理器效能與判定正確性、實時性。至于低轉速的速度控制尤其是低速起動則因為回傳的hall-sensor信號變化變得更慢，怎樣擷取信號方式、處理時機以及根據電機特性適當配置控制參數值就顯得非常重要。或者速度回傳改變以encoder變化為參考，使信號分辨率增加以期得到更佳的控制。電機能夠運轉順暢而且響應良好，P.I.D.控制的恰當與否也無法忽視。

  之前提到直流無刷電機是閉回路控制，因此回授信號就等于是告訴控制部現在電機轉速距離目標速度還差多少，這就是誤差（Error）。知道了誤差自然就要補償，方式有傳統的工程控制如P.I.D.控制。但控制的狀態及環境其實是復雜多變的，若要控制的堅固耐用則要考慮的因素恐怕不是傳統的工程控制能完全掌握，所以模糊控制、專家系統及神經網絡也將被納入成為智能型P.I.D.控制的重要理論。

6ES7231-7PB22-0XA8
A Package FISHER Rosemount Cards ( 12Cards)
12P0247X032,12P0097X032,41B5222X362,12P1824X012......

Enlarge
FISHER ROSEMOUNT SCL-C-002-M2 WATER QUALITY ANALYZER

KJ4001X1-BA2 FISHER-ROSEMOUNT 2-WIDE CARRIER W/RED NEW 
A16B-1010-0430



A16B-1010-0510



 A16B-1100-0060


 A16B-1100-0080


  A16B-1100-0091



  A16B-1100-0200



  A16B-1100-0220



  A16B-1100-0221



  A16B-1100-0261



  A16B-1100-0280



  A16B-1100-0300



  A16B-1100-0310



  A16B-1100-0310



  A16B-1200-0080


A16B-1200-0150



  A16B-1200-0160



  A16B-1200-0230



  A16B-1200-0270



  A16B-1200-0310



  A16B-1200-0350



  A16B-1200-0360



  A16B-1200-0660


New Fisher Rosemount Discrete IO 12P1824X012 CL6721X1A4

Fisher Rosemount 0444rl1u1c2na temperaure 0444rl1u1 

FISHER ROSEMOUNT 0444RL2U1A2E5 0444RL2U1A2E5

FISHER ROSEMOUNT 3051 L3AA2FD21AA PRESSSURE TRANSMITTER

New Fisher-Rosemount PC Board CL7701X1-A1 32B7734X022

FISHER ROSEMOUNT Element from a 1151GP7E22S1M1B1

Fisher Rosemount Highway Data Link--HDL Data Highway II
NEW DH6032-A13/ LA10, 12P1122X032, Siemens HII

KJ3004X1-EA1 FISHER ROSEMOUNT FIELDBUS H1 INTERFACE 
Expedited shipping available

Rosemount-Fisher Pressure Transducer Transmitter; *A5

KJ3001X1-BH1 FISHER-ROSEMOUNT DO MODULE NEW IN BOX
Expedited shipping available

Fisher Rosemount Alphaline diaphragm pres. transducer

Fisher Rosemount Alphaline stainless pres. transducer

FISHER ROSEMOUNT 8711 8711-TSA30FR1E5 8711TSA30FR1E5

Fisher-Rosemount 01984-2512-0005 Marshalling Panel MPC

FISHER ROSEMOUNT 6" MAGNETIC FLOW METER W/ TRANSMITTER
TRANS MODEL: 8732CT12M4L171 FLOW MODEL: 8721CSA060AG

Fisher Rosemount Contact I/O Board 01984-1460-0003

FISHER ROSEMOUNT CONTROLS 3582-10 VALVE POSITIONER NIB

FISHER ROSEMOUNT TRANSMITTER 3144/3244MV MANUAL 00809
Expedited shipping available

FISHER ROSEMOUNT PROVOX MPU MULTILAYER CL7661X1-A11

FISHER ROSEMOUNT 1151DR2F12B2 PRESSURE TRANSMITTER 1151

FISHER ROSEMOUNT KJ3004X1-BA1 FIELDBUS H1 CARD DELTA V

KJ3001X1-BD1 FISHER ROSEMOUNT DI MODULE NEW IN BOX
Expedited shipping available

Fisher Rosemount Highway Data Link--HDL Data Highway II

2 Fisher-Rosemount HF200 Hart Series Filter HF210-A1

FISHER ROSEMOUNT EMERSON AS-I KJ3005X1-BA1 ACTUATOR

FISHER ROSEMOUNT 846 DS111 CURRENT TO PRESS. TRANSDUCER

FISHER ROSEMOUNT DI 24VDC DRY CONTACT CARD KJ3001X1-BB1

KJ3001X1-BK1 FISHER-ROSEMOUNT DO MODULE NEW IN BOX
Expedited shipping available

KJ4001X1-CC1 FISHER-ROSEMOUNT I/O TERMINAL BLOCK NEW
Expedited shipping available

KJ30001X1-BC1 FISHER ROSEMOUNT DI MODULE NEW IN BOX
Expedited shipping available

FISHER ROSEMOUNT CL7001X1-A9 CONFIG CONTROLLER