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KEYBOARD 3为自动键,若设置为自动时,如果接收罐水位低于低位限制值,L/B输出一个逻辑1,因自动键3输出为逻辑1,触发器被置位,与门1输出逻辑1,经或门2使触发器7置位,水泵起动;如果接收罐水位高于高位限制值,L/A输出一个逻辑1,为防止液位开关抖动而设置TDON,因触发器3在自动时输出1,与门9输出1,经或门11使触发器7复位,水泵停止。(TDON即ONDELAY。ONDELAY算法延迟输出将要变为 TRUE的时间。当输入为TRUE且本算法允许时,定时器输出按指定的时基累积时间直到等于定时器延迟时间数值。此时,定时器输出停止累积且其值保持为延迟时间数值,输出变为TRUE。
五.应用心得体会
1.热电阻的量程变换系数有在线计算和离线计算两种方法。在线计算使用Sensor Calibrate工具,离线计算使用Coefficient Calc工具。在线计算工具直接修改控制器中点的参数,使用时注意会使点变为坏质量时,点的扫描会停止,这将影响回路操作。在完成计算后要使用 Reconcile工具将数据传送到数据库中。离线计算工具修改数据库的参数,不影响实时操作,但下装到控制器后才起作用,若已计算有转换系数,则它不再计算,需注意参数填写完整。
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DRESSER 8364 0486 220 SS PIPE REPAIR CLAMP 4.45-4.86IN X 12IN WIDE D591143
JOY 01760407-0031 GARDNER DENVER COMPRESSOR SEAT-DISCH VALVE D549158
INTERFACE DEVICES P045/45-RGPM-1GA AIR-DRIVEN INTENSIFIER LIQUID PUMP D593864
VICTAULIC 12/323.9 77 PIPE COUPLING 12IN D575420
KIMBERLY CLARK A20 3688001 KLEENGUARD WHITE BOOT COVER D567761
BABCOCK WILCOX BA9234400 SPG BOLT BRZ UNS NUT D568250
LEGRIS 1100U08 00 TUBEPACK 8MM OD 60M LENGTH CLEAR TUBING D572611
PUNCH-LOK P-1000 LOKING TOOL D568619
GARDNER DENVER 00217270 JOY COMPRESSOR VALVE GUARD D549097
VEKTEK P1-5141-00 SWING CLAMP BOTTON FLANGE 1 1/2 RH D538773
LEEMAN 120-3748 1 PIECE TORCH WITH BALL JOINT AQUEOUS 550-20 D523777
HARVARD 3210 GEAR OIL LUBE HIGH VISCOSITY FILTER ELEMENT D573226
HARVARD 3210 GEAR OIL LUBE HIGH VISCOSITY FILTER ELEMENT D573233
BECK 14-9730-08 DAMPER ACTUATOR GEAR MODULE ASSEMBLY D582918
RIVETING MACHINE TOOL UNIT ASSEMBLY 4000PSI D563164
BABCOCK WILCOX BA9226623 SPG BOLT BRZ UNS NUT D568252
GARDNER DENVER 01608788-0023 JOY COMPRESSOR PISTON RING D549001
LEEMAN 120-3748 1 PIECE TORCH WITH BALL JOINT AQUEOUS 550-20 D523774
RAYCHEM MCK-5-2L IN-LINE 3PHASE 8.7KV MOTOR CONNECTION KIT D584373
HACH 27425-45 TEST N TUBE REACTIVE PHOSPHATE 0-5MG/L REAGENT SET D585153
HACH 26053-45 TEST N TUBE NITRAVER X REAGENT SET D585152
JOY 241337 IAP COMPRESSOR CARRIER BULL RING 8IN D548966
MARSHALL V-PL45CS-1 TV PINHOLE LENS D536788
NORTH BC89150000 RED SAFETY BUMP CAP D563877
RUB S.92 S92B41 1/4 IN NPT BRASS BALL VALVE D566275
RUB S.92 1/4 IN NPT BRASS BALL VALVE D566278
PENBERTHY TME 1-1/2IN NPT PP CIRCULATING IN-TANK MIXING EDUCTOR D567682
BAND-IT CP12 GALVANIZED STEEL CENTER PUNCH CLAMP D567973
HONEYWELL 364950 TOOL KIT FOR INDUCTION/SNCHRONOUS MOTORS D528591
JOY 1760260-0003 IAP COMPRESSOR CARRIER RING 8 IN D548964
NSW 2000A SERIES 2000 PNEUMATIC BOLT TORQUE UNIT 0-4700LB-FT D541377
WOODHEAD TB50-15 AERO-MOTIVE TOOL BALANCER D536969
LOCTITE 97105 RESERVOIR D522946
SLOAN SBP-1P SB-2000 3/16 LUBRICATION SYSTEM PUMP D545786
THOMAS&BETTS AB241-3/8HDGC SUPERSTRUT SQUARE CHANNEL WASHER D556297
BURGER & BROWN FTF2-75 SMARTFLOW FASTIE TIE-IN 2 IN COUPLER 3/4-10M D556198