鼎晟达自动化 MDS-B-CVE-55
日期：2020-8-261、输入信号可靠性研究
要提高现场输入给PLC信号的可靠性，首先要选择可靠性较高的变送器和各种开关，防止各种原因引起传送信号线短路、断路或接触不良。其次在程序设计时增加数字滤波程序，增加输入信号的可信性。
在现场输入触点后加一定时器，定时时间根据触点抖动情况和系统要的响应速度确定，一般在几十ms，这样可保证触点确实稳定闭合后，才有其它响应。模拟信号滤波可采用图2b程序设计方法，对现场模拟信号连续采样3次，采样间隔由A/D转换速度和该模拟信号变化速率决定。3次采样数据分别存放在数据寄存器DT10、DT11、DT12中，当最后1次采样结束后利用数据比较、数据交换指令、数据段比较指令去掉最大和最小值，保留中间值作为本次采样结果存放在数据寄存器DT0中。
提高读入PLC现场信号的可靠性还可利用控制系统自身特点，利用信号之间关系来判断信号的可信程度。如进行液位控制，由于储罐的尺寸是已知的，进液或出液的阀门开度和压力是已知的，在一定时间里罐内液体变化高度大约在什么范围是知道的，如果这时液位计送给PLC的数据和估算液位高度相差较大，判断可能是液位计故障，通过故障报警系统通知操作人员检查该液位计。
又如各储罐有上下液位极限保护，当开关动作时发出信号给PLC，这个信号是否真实可靠，在程序设计时我们将这信号和该罐液位计信号对比，如果液位计读数也在极限位置，说明该信号是真实的；如果液位计读数不在极限位置，判断可能是液位极限开关故障或传送信号线路故障，同样通过报警系统通知操作人员处理该故障。由于在程序设计时采用了上述方法，大大提高了输入信号的可靠。
1、执行机构可靠性研究
当现场的信号准确地输入给PLC后，PLC执行程序，将结果通过执行机构对现场装置进行调节、控制。怎样保证执行机构按控制要求工作，当执行机构没有按要求工作，怎样发现故障？我们采取以下措施：当负载由接触器控制时，启动或停止这类负载转为对接触器线圈控制，启动时接触器是否可靠吸合，停止时接触器是否可靠释放，这是我们关心的。
X0为接触器动作条件，Y0为控制线圈输出，X1为引回到PLC输入端的接触器辅助常开触点，定时器定时时间大于接触器动作时间。R0为设定的故障位，R0为ON表示有故障，做报警处理；R0为OFF表示无故障。故障具有记忆功能，由故障复位按钮清除。
当开启或关闭电动阀门时，根据阀门开启、关闭时间不同，设置延时时间，经过延时检测开到位或关到位信号，如果这些信号不能按时准确返回给PLC，说明阀可能有故障，做阀故障报警处理。程序设计如图3b所示。X2为阀门开启条件，Y1为控制阀动作输出，定时器定时时间大于阀开启到位时间，X3为阀到位返回信号，R1为阀故障位。
结论
我们在胜利油田胜利采油厂胜砣注聚站自动控制系统设计中采用了以上方法，经过近2年的运行证明这些方法的采用对提高系统可靠性运行是行之有效的。
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漳州鼎晟达自动化设备有限公司
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【主营产品】
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Siemens Simatic S5 6ES5288-4UA11 6ES5 288-4UA11 E-Stand: 2
Siemens Moby E 6GT2302-2EE00 6GT2 302-2EE00
Siemens Simatic S7 / CPU 319-3 PN/DP / 6ES7 318-3EL00-0AB0
SIEMENS 6ES7-440-1CS00-0YE0 FNFP 6ES74401CS000YE0
SIEMENS 6ES5-095-8MD03 NSPP 6ES50958MD03
SIEMENS 6AV6-642-0DA01-1AX1 NSFP 6AV66420DA011AX1
Siemens CFT3B250 NSFP **GENUINE** Furnas
ITE SIEMENS CED63B030L NSFP CED63B030L
6DS1212-8AB, SIEMENS Teleperm, New in box sealed, 6DS12128AB
1 PC Siemens Inverter S120/240 series 200kw/220KW Driver Board A5E00297617
Siemens 6SE92 Micro Master Kit (sealed box) - NIB
Siemens Simatic Hawkeye 6GF3060-OHT16-OCM0 Camera & Pentax C2514-M TV Lens
Siemens Simatic S7 6ES7 414-2XG04-0AB0 CPU 414-2 6ES7414-2XG04-0AB0
Siemens 6SN1124-1AB00-0CA1 (6SN11241AB000CA1)
Siemens 6ES7 214-1BD21-0XB0 PLC
SIEMENS 6ES7-215-2BD00-0XB0 NSFP 6ES72152BD000XB0
SIEMENS 1LA2060-2AA10 USPP 1LA20602AA10
SIEMENS M4260-E4 NSPP M4260E4
SIEMENS 6ES5-432-3BA12 USPP 6ES54323BA12
6ES5255-3AC12, SIEMENS, Simatic S5, Simatic S5, 6ES52553AC12
SIEMENS 1011550001 TELEGYR SYSTEMS PCB CIRCUIT BOARD MODULE D523320
Siemens Simatic TP27 Color,6AV3627-1QK00-0AX0,6AV3 627-1QK00-0AX0
Siemens Simatic Rack PCS 7 6ES7650-0LG16-0YX0 (PC 6)
Siemens Simatic Rack PCS 7 6ES7650-0LF16-0YX1 (PC 1)
Siemens 6SC6111-2AA00 (6SC61112AA00) OBO!
SIEMENS 6ES5-475-3AA11 USPP 6ES54753AA11
SIEMENS 6SE7-036-0EF85-0EA0 USPP 6SE70360EF850EA0
Siemens 6SC6100-0GB00 One Year Warranty !
6EA1730-0BA00-2AA1, SIEMENS, SIMATIC PG & software ST7, SIMATIC PG & software ST
Siemens 6ES54607LA13 NSFP **GENUINE** Furnas
**REPAIR** SIEMENS 6AV6645-0CB01-0AX0 (6AV66450CB010AX0) 3 Month Warranty!! OBO!
Siemens 6SL3120-1TE23-0AA3 (6SL31201TE230AA3)
SIEMENS 6FX1-122-2AA02 USPP 6FX11222AA02
Siemens MS100 6FX1113-0AA01
Siemens MS100 / MS102 6FX1113-0AA02
SIEMENS 6SC6-500-0UB02 USPP 6SC65000UB02
Siemens 6ES5 262-8MB12, New, 6ES52628MB12, Fast Shipping
Siemens 6FM1707-3AA10, , 6FM17073AA10, Fast Shipping
SIEMENS 6AV4-012-0AA10-0AB0 USPP 6AV40120AA100AB0
SIEMENS HLD63B600 USPP HLD63B600
SIEMENS 7ML50332AA01A LEVEL SENSOR *NEW IN BOX*
Siemens AAZ14068P026 Operator Controller 8150-1600-001
SIEMENS 6FC3541-0AA OPERATOR INTERFACE WITH 6EV3055-0BC POWER SUPPLY
Siemens 6SL3130-7TE23-6AA3 ACTIVE LINE MODULE 3AC 380/480V 50/60HZ DC 600V 60A
Siemens 6SX7005-0AF00 SLM Simolink Monitor ** Free Shipping!!
Siemens 6FC5371-0AA10-0AA2
Siemens Simatic S7 CPU 6ES7414-3XJ04-0AB0
Siemens 3 Phase Brushless Servomotor 1FT6086-1AF71-4AG1_1FT60861AF714AG1
SIEMENS 6AV6-642-0BA01-1AX0 USPP 6AV66420BA011AX0
SIEMENS 6FC3151-ZHB-Z CONTROL RACK **
SIEMENS CONTACTOR 3TK5222-0AV0 **
New, factory sealed SIEMENS 6FX1120-5BA01
NEW, FACTORY SEALED SIEMENS/SINUMERIK 880 SERVO-CPU 6FX1121-3BA01
NEW IN BOX SIEMENS FURNAS CONTROL MCC UNIT BUCKET 100A BREAKER W/Door ED63A100
SIEMENS 6ES7 314-5AE03-0AB0 **
SIEMENS 6ES5095-8MB02 **
SIEMENS 6DR5010-0NG00-0AA0 POSITIONER *NEW OUT OF BOX*
SIEMENS 6ES5-685-0UA11 USPP 6ES56850UA11
SIEMENS SIMATIC S7 ANALOG INPUT MODULE 6ES7 431-7QH00-0AB0
NEW SIEMENS AG 6SW1700-5JA00-5AA1 DRIVE ES BASIC COPY FOR V5.5 SP1 ON DVD
Genuine Siemens 6ES7315-2EH14-0AB0 SIMATIC S7-300 CPU Module, EAN 4025515077770
SIEMENS TELEPERM M 6DS1332-8BC,C79040-A6442-C958-01-86,C79040-A6430-C191-03-86
Siemens Simatic S7-300 CPU614 6ES7 614-1AH03-0AB3 w 6ES7 951-0KJ00-0AA0(13002)
Siemens Simatic S7-300 CPU614 6ES7 614-1AH03-0AB3 w 6ES7 951-0KJ00-0AA0(13003)
SIEMENS CONTROL CIRCUIT BREAKER MCC UNIT 65004001 / U01FA NIB
SIEMENS SIMODRIVE MASTER DRIVE 6SC9811 4BC20 6SC98114BC20 BAUGRUPPE REGELKARTE
Siemens 3RW3454-0DC34 One Year Warranty !
SIEMENS 6DD1-610-0AG1 USPP 6DD16100AG1
SIEMENS MOORE PRODUCTS 15737-69 R BCG MODULE ASMBLY ***NNB***
1FT5044-0AF71-1-Z Motor Siemens 145824, Z:G51+K31+K42+K85_M24
NOKIA SIEMENS NETWORKS A42024-L5449-A1-11 SYSTEM CONTROL BOARD (hiT7025/7035)
SIEMENS 6SC 6108-0SN00 6SC6108-0SN00 6SC61080SN00
SIEMENS 6SN1-123-1AA00-0AA2 FNFP 6SN11231AA000AA2
Siemens FM 357-2 4-AXIS-CONTROL 6ES7 357-4AH01-0AE0 ( 6ES73574AH010AE0 )
SIEMENS 115U CPU 945 6ES5 945-7UA23 6ES5945-7UA23 6ES59457UA23
ITE SIEMENS W411044 NSFP W411044
SIEMENS SIMATIC S5 6ES5944-7UB21 6ES59447UB21 6ES5-944 CPU 944B 115U PROCESSOR
SIEMENS MASTERDRIVE 6SE7031-6EB87-2DA1 6SE70316EB872DA1 6SE7 031 BREAKING UNIT
Siemens Simatic IPC427C MICROBOX PC 6ES7647-7BB30-3XM0 6ES76477BB303XM0 neu !
SIEMENS 6DS1 143-8AA -- ; TELEPERM M SYNCHRONISIERBAUGRUPPE
SIEMENS 6SC-6100-ONA20 USPP 6SC61000NA20
Siemens 6FX1136-8BB00 (570 368 9002) & 6FX1134-2BA01 (570 342 9101.00 B)
SIEMENS 6ES7-216-2AF21-0XB0 USPP 6ES72162AF210XB0
Neuer Siemens Simatic Vision Sensor Typ 6GF1018-2AA10 Controller VS120 E-02
SIEMENS SB40TLSI USPP SB40TLSI
New Siemens 6GK7443-1EX30-0XE0 6GK7 443-1EX30-0XE0 SIMATIC S7-400 CP443-1 CPU
Siemens 6SC9830-0HA12 Anpassbaugruppe "Warranty"
Siemens 6SA8242-0BC01 Sinumerik "Warranty"
Siemens 6EW 1861-3AB or 6EW1861-3AB Modular Power Supply "Warranty"
Siemens 6EW 1890-2AA or 6EW1890-2AA Power Supply "Warranty"
Siemens 6FC5114-0AB01-0AA0 Power Supply "Warranty"
Siemens 6DD 1660-0AJ1 or 6DD1660-0AJ1 Kommunikationsmo "Warranty"
Siemens 6RB2000-0GA00 Simodrive "Warranty"
Siemens C98043-A1045-L3-11 Simoreg
Siemens 6SC9830-0HA82 Board "Warranty"
Siemens Simatic S5 WF470, 6FM1470-3CA20,6FM1 470-3CA20
SIEMENS 6ES5924-3SA12 Simatic Central Processor Module
Moore ACM APACS+ Advanced Control Module 39ACM24BAN V 3.03 PLC Siemens Quadlog
Siemens Permanent Magnet Motor 1FT5076-0AF01-0-Z _ Z: G44 G45 _ with Encoder
Brand New in Box SIEMENS 6SE7090-0XX84-1FK0 Programmable Logic Controller
Siemens 6DD 1607-0EA2 Simatic S7 6DD1607-0EA2
**REPAIR** SIEMENS 6AV3627-1QL01-0AX0 (6AV36271QL010AX0) 3 Month Warranty!! OBO!
**REPAIR** 6SN1145-1BB00-0EA0 (6SN11451BB000EA0) by SIEMENS - 3 Month Warranty!
Siemens Teleperm 6DS1723-8BB, 6DS 1723-8BB Baugruppe
SIEMENS R15E02-A186 USPP R15E02A186
SIEMENS 6DS1-330-8BA USPP 6DS13308BA
ITE SIEMENS JJ2B250 USPP JJ2B250
SIEMENS 6SL3-040-0MA00-0AA1 NSFP 6SL30400MA000AA1
ITE SIEMENS WLRLYCUB NSFP WLRLYCUB
Siemens Teleperm 6DS1101-8AB NEW
SIEMENS NEW 6GK5216-0BA00-2AA3 6GK5 216-0BA00-2AA3 PLC (AB8) Scalance X216
New Siemens 6ES5 928-3UB21 6ES59283UB21 CPU928B Processor Module
*NEW SEALED* SIEMENS 6AV6 640-0CA01-0AX0 Simatic TP170 MICRO 6AV6640-0CA01-0AX0
SIEMENS 3VF7112-1FK60-0AA0 NSFP 3VF71121FK600AA0
SIEMENS 6AV3515-1MA20-1AA0 USPP 6AV35151MA201AA0
Siemens 6FC5203-0AF02-0AA1 operator panel
SIEMENS 14-193-825-586 NSPP 14193825586
Siemens Teleperm M 6DS1826-8CA // 6DS18268CA
1 PC New Siemens 6AV2 124-0JC01-0AX0 6AV2124-0JC01-0AX0 In Box
Siemens 6SN1118-0DM21-0AA0 SIMODRIVE 611-D, NEU, inkl. Mwst.
SIEMENS 6AV3-515-1MA22-1AA0 USPP 6AV35151MA221AA0
PEP VM662/642 VMEbus Single-Board Computer w ModPack PLC Kontron Eiko Siemens TI
SIEMENS SXL40 USPP SXL40
SIEMENS 1FT6-064-1AF71-3AG1 USPP 1FT60641AF713AG1
SIEMENS HFX3R150 NSFP HFX3R150
Siemens Simodrive 611 Regeleinschub 12 Monate Gew?hrleistung 6SN1118-1NK01-0AA1
SIEMENS 1FT6082-1AF71-1AG1 USPP 1FT60821AF711AG1
SIEMENS 1FT6082-1AF71-3AG1 USPP 1FT60821AF713AG1
Siemens Simatic 6ES7 414-3XJ00-0AB0 S7 6ES7414-3XJ00-0AB0 CP414-3
6ES7414-1XG00-0AB0, SIEMENS SIMATIC S7-400 ST74 6ES74141XG000AB0
SIEMENS CRL0F5022K6 NSFP CRL0F5022K6
SIEMENS 6DD1-641-0AC0/6DD16-41-0AC0/6DD1641-0AC0/6DD16410AC0 PC BOARD ***XLNT***
Siemens 6ES7613-1CA00-0AE3 C7-613 TOUCH 6ES7 613-1CA00-0AE3
NEW MODULE DRIVE BOARD A5E00825002 SIEMENS BOARD ONLY!LOCATION M
SIEMENS 6ES7 315-2AH14-0AB0 -FS-
SIEMENS 6ES7 315-2AG10-0AB0 -FS-
SIEMENS 6ES5-135-3KA31 USPP 6ES51353KA31
Siemens 6ES5943-7UA22 (6ES59437UA22)
**REPAIR** SIEMENS 6AV6545-0CC10-0AX0 (6AV65450CC100AX0) 3 Month Warranty!! OBO!
Siemens Teleperm 6DS1302-8AB, 6DS 1302-8AA Baugruppe
Siemens Teleperm 6DS1326-8BB, 6DS 1326-8BB Baugruppe
Siemens Teleperm 6DS1700-8BA, 6DS 1700-8BA Baugruppe
SIEMENS 6ES5-314-3UB11 USPP 6ES53143UB11
1pcs Siemens module 6ES7 336-1HE00-0AB0
SIEMENS WESTINGHOUSE CIRCUIT BREAKER 300AMP HLB3300 *REMANUFACTURED*
MOORE SIEMENS EAM 39EAMCAN ENHANCED 24VDC ANALOG MODULE
Siemens IGD1 Inverter Gate Driver Board - 6SE7031-0EE84-1JC0
Siemens 6ES7416-2FK04-0AB0 6ES7 416-2FK04-0AB0 SIMATIC S7-400F CPU 416F-2
Siemens 6ES5-524-3UA15/6ES55243UA15 FACTORY SEALED!!!! OFFERS ACCEPTED!!
**REPAIR** 6ES7414-2XG04-0AB0 (6ES74142XG040AB0) by SIEMENS - 3 Month Warranty!
SIEMENS 6FX1-144-2BA00 USPP 6FX11442BA00
Siemens 6ES7 416-2FK04-0AB0 6ES7416-2FK04-0AB0 SIMATIC S7-400F CPU 416F-2
6DS1717-8CC, SIEMENS, Teleperm, Teleperm, 6DS17178CC
Siemens 6RB2160-0FB00 Simodrive Leistungsteil ungebraucht
SIEMENS 6DS1-103-8AB USPP 6DS11038AB
Siemens 6ES5470-4UA13 * 6ES5 470-4UA13 * 6ES5 470 4UA13
Siemens * OP395 * 6ES5395-0UA11 * 6ES5 395-0UA11 * 6ES5 395 0UA11
**REPAIR** SIEMENS 6FC5110-0DB02-0AA2 (6FC51100DB020AA2) 3 Month Warranty!! OBO!
Siemens 6ES5945-7UA13 * 6ES5 945-7UA13 * 6ES5 945 7UA13
Siemens Simadyn CS4 D 6DD1660-0AG0 Version B01 TOP
Siemens Simatic S5 CP 580 6ES5580-0UA12 6ES5 580-0UA12
**REPAIR** 6ES5581-0ED14 (6ES55810ED14) by SIEMENS - 3 Month Warranty!
Siemens Simatic 6ES7 513-1AL00-0AB0 FS05 CPU TOP Fast neu 6ES7 513-1AL00-0AB0
Siemens 6ES5185-3UA21 / 6ES5 185-3UA21 Simatic S5 Rack leer
SIEMENS 6SC6-100-0GC08 USPP 6SC61000GC08
Siemens C98043-A1214-L21-06 Bord Simoreg Repair
SIEMENS 6SN1-112-1AB00-0BA0 NSPP 6SN11121AB000BA0
SIEMENS 6SL3-120-2TE13-0AA0 USPP 6SL31202TE130AA0
SIEMENS 6SN2132-1CK11-1BA0 NSPP 6SN21321CK111BA0
Siemens 6SN1118-0DG23-0AA0 (6SN11180DG230AA0)
New Siemens 6SE7090-0XX84-1FK0 Simovert Master Drives Testbox AU
SIEMENS 6AV6 542-0BB15-2AX0 -RFUR-
SIEMENS 7ND3521-1BB1-1NA1 USPP 7ND35211BB11NA1
SIEMENS 505-5103 TURBO PARISON BLOW MOLDING MODULE
6AV3617-1JC20-0AX1 Siemens OP17 OP-17 - 12 Months Warranty
SIEMENS CXLFO1203 USPP CXLFO1203
SIEMENS MTA USPP MTA
SIEMENS 6GK7-343-1EX11-0XE0 USPP 6GK73431EX110XE0
SIEMENS 294-05994 ACTUATOR SKC62U **
Siemens Simovert P 6SE2127-3AA21
Siemens SIMATIC BOX PC 627B DC 6ES7647-6BG36-0DB0
Siemens 3RV1073-7GL10 KOMPAKTLEISTUNGSSCHALTER 3RV1 NEW NEU
6ES7750-0CA31-0SB2, SIEMENS, SIMATIC PG & software ST7, SIMATIC PG & software ST
Siemens Simatic S7 6ES7621-1AD00-0AE3 6ES7 621-1AD00-0AE3 C7-621
Siemens Simatic S7 6ES7621-1AD00-0AE3 6ES7 621-1AD00-0AE3 C7-621
Siemens Bedientafel 3M = 548.025.9026.01
Siemens 6ES7613-1CA00-0AE3 C7-613 TOUCH 6ES7 613-1CA00-0AE3 E-Stand:01
Siemens Simatic S7 6ES7621-1AD00-0AE3 6ES7 621-1AD00-0AE3 C7-621
Siemens 6ES5470-7LB13 6ES5 470 7LB13 Analogausgabe
Siemens Simatic S5 Cam Controller Module, 6ES5264-8MA12
Siemens 6FC5012-0CA03-0AA0 Sinumerik Interface 840C/CE, IM328-N, NEU OVP
SIEMENS 6GK5310-0FA00-2AA3 USPP 6GK53100FA002AA3
Siemens 3TK52220AV0 NSNP **GENUINE** 3TK5222 0AV0 Furnas
SIEMENS WF 705 6FM1705-3AA00 VERSION A07-OVP-VERSIEGELT
Siemens Teleperm M/ME 6DS1715-8BB 6DS1 715-8BB analog module
Siemens Simatic S7 6ES7467-5GJ02-0AB0 IM467 6ES7 467-5GJ02-0AB0 Neu Versiegelt
Siemens Teleperm M / ME 6DS1322-8BA 6DS1 322-8BA
Siemens Teleperm M / ME 6DS1302-8AB 6DS1 302-8AB I/O Bus Module
SIEMENS Simatic S5 6ES5457-4UA12 6ES5 457-4UA12 E-Stand: 6 -sealed-
Siemens Teleperm ME 6DS1400-8BA 6DS1 400-8BA Reglerbaugruppe