ALLEN BRADLEY 1336F-B100-AN-EN-HCS2-L6多段操作的一個(gè)特點(diǎn)是按照周期輸入值自動(dòng)增減周期：在周期增量區(qū)輸入一個(gè)正值將增
加周期；輸入一個(gè)負(fù)值將減少周期；輸入0 值將不改變周期。當(dāng)需要人為終止一個(gè)正進(jìn)行中的PTO
包絡(luò)時(shí)，只需要把狀態(tài)字節(jié)中的用戶終止位（SM66.5 或SM76.5）置為1。
當(dāng)PTO 包絡(luò)執(zhí)行時(shí)，當(dāng)前啟動(dòng)的段落數(shù)目保存在SMB166（或SMB176）中。表2-13 為多
段PTO 操作的包絡(luò)表格式。
ALLEN BRADLEY 1336F-B100-AN-EN-HCS2-L6包絡(luò)表數(shù)值計(jì)算
PTO/PWM 脈沖發(fā)生器的多段包絡(luò)表功能多應(yīng)用在運(yùn)動(dòng)控制中，特別是對(duì)步進(jìn)電機(jī)、伺服電
機(jī)的控制。
下面將以一個(gè)對(duì)步進(jìn)電機(jī)控制的具體應(yīng)用示例來說明在實(shí)際應(yīng)用中如何計(jì)算多段包絡(luò)表。對(duì)
步進(jìn)電機(jī)的控制包括3 段：*段從起始（4k）輸出200 個(gè)脈沖后加速到一個(gè)固定電機(jī)轉(zhuǎn)速（20k），
演示如何加速步進(jìn)電機(jī)；第二段在固定轉(zhuǎn)速（20k）下輸出3000 個(gè)脈沖，演示如何以恒速控制步
進(jìn)電機(jī)；第三段從固定轉(zhuǎn)速（20k）輸出200 個(gè)脈沖后減速到起始轉(zhuǎn)速（4k），演示如何減速步進(jìn)
電機(jī)。見圖2-19。
圖2-14 步進(jìn)電機(jī)控制頻率－時(shí)間圖
在該示例中使用如下的計(jì)算公式來計(jì)算每列脈沖串周期的周期增量值：
（該段結(jié)束時(shí)的周期值 － 該段起始時(shí)的周期值）/該段脈沖數(shù)

LINEAR STAGE TABLE 3 AXIS MANUAL 2-1/2" X 2-1/2" X 1"Z

HIWIN LINEAR RAIL 23.5" LONG & 2 BEARING BLOCK MGN15 

REHOSTAT VARIABLE TRANSFORMER, ADJUSTABLE 0-600V. 300W.

GEARED MOTOR 12VDC OR 24VDC TORQUE 50 OZ-IN. 30-60 RPM

EUCHNER INDUCTIVE PROXIMITY SWITCH SENSOR NIB SW101

EUCHNER INDUCTIVE PROXIMITY SWITCH SENSOR NIB SW103

EUCHNER INDUCTIVE PROXIMITY SWITCH SENSOR NIB SW108

LINEAR STAGE ACTUATOR TABLE 5.75" TRAVEL W/ 2 LIMITS

SPROCKET TIMING BELT PULLEY GEAR 1/2" BORE LOT 60

SYNCHRO RESOLVER TEST CONSOLE & VOLTMETER POWER SUPPLY

SYNCHRO STANDARD MODEL# A1204S-5 MFG. ASTRO SYSTEMS

ROLLON LINEAR STAGE ACTUATOR & AMP STEP MOTOR

TRANSISTOR DEVICES DC POWER SUPPLY 5VDC @ 70AMPS NEW

NEMIC LAMBDA DC POWER SUPPLY HIGH QUALITY 18VDC @ 11.5A

BOURNS TRIM POT POTENTIOMETER 20K 24 TURN LOT OF 50

HELIPOT TRIM POT POTENTIOMETER 200K 20 TURN BOX 100

NEMIC LAMBDA DC POWER SUPPLY HIGH QUALITY 15VDC @ 20AMP

CONDUIT FLEXIBLE LIQUID TIGHT 1/2" 100FT. GRAY NEW BOX

NEMIC LAMBDA DC POWER SUPPLY HIGH QUALITY 10VDC @ 30AMP

COPLEY CONTROLS DC SERVO AMPLIFIER MODEL# 306AP

PMI MODEL# U9FB 12VDC DC SERVO MOTOR LOW PROFILE

ATC FIBEROPTIC BEAM SWITCH SENSOR + FIBER OPTIC CABLE

TRANSICOIL DC MOTOR TACHOMETER PERMANENT MAGNET 12VDC

EAD LINEAR ACTUATOR STEP MOTOR 6" TRAVEL LA23GCKJ-200

SLIP RING ASSY. HIGH QUALITY MILITARY GRADE 40 CIRCUITS

SLIP RING ASSY. HIGH QUALITY MILITARY GRADE 40 CIRCUITS

LINEAR STAGE ACTUATOR TABLE 24" TRAVEL 0.25" LEAD 

HIWIN LINEAR RAIL P/N LGR30P LENGTH 1040mm (2) NEW

DC MOTOR AND ENCODER MATSUSHITA ELECTRIC P/N MPX-40C4WA

EDYNE ENCODER OPTICAL INCREMENTAL 6000 counts/rev