2801-N22+++2801-N22++2801-N22

2801-N22
2801-N22
2801-N22
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。

SIEMENS 6GK5 491-2AB00-8AA2 SIMATIC NET INDUSTRIAL ETHERNET MODULE

SIEMENS 6ES7951-0KJ00-0?AA0 MEMORY CARD, 512KB, SHORT VERSION

SIEMENS 6ES7 158-3AD01-0XA0 SIMATIC COUPLING MODULE PN/PN COUPLER

SIEMENS 6ES7-132-4BD02-?0AA0 DIGITAL OUTPUT MODULE 24VDC 0.5A, SEE DESC

SIEMENS 6ES7-132-4BD02-?0AA0 DIGITAL OUTPUT MODULE 24VDC 0.5A, SEE DESC

SIEMENS 6ES7 131-4EB00-0AB0 INPUT MODULE, 2-POINT, 120VAC, 15MM, SEE DESC

SIEMENS 6ES7-131-4BD01-?0AA0, SEE DESC

SIEMENS 5SY4180-7 MINI CIRCUIT BREAKER, 230/400V, 1-POLE, CURVE C

MARATHON 1443614 3/8-16 STUD LINE/LOAD 600V 840A

ALLEN BRADLEY 105-C09NZJJOV SERIES A REVERSING CONTACTOR 3P 3HP 24V

ALLEN BRADLEY 700-CF310DJ SERIES A MCS-CF CONTROL RELAY 3 N.O. / 1 N.

SIEMENS 5SY4 550-8 MINI CIRCUIT BREAKER, 230V, 15KA, 1P+N, 50A

SIEMENS 5SY4 120-7 MINI CIRCUIT BREAKER 1 POLE 230/400V

SIEMENS 5SY4 101-5 MINI CIRCUIT BREAKER, 230/400V, 1-POLE, 1A, CURVE A

SIEMENS 5SU1 356-7KK16 CIRCUIT BREAKER, 30MA, 6KA, 230V, 16AMP

SIEMENS 5ST3 013 AUXILIARY CIRCUIT SWITCH, LOW OUTPUT

SIEMENS 3TA2LG600LN BREAKER, ALUMINUM LUG KIT

SIEMENS 3TA2JG250 VL ALUMINUM LUG, *KIT OF 3* 3/0-250 KCMIL

SIEMENS 3RW4046-1TB04 AC SEMICONDUCTOR MOTOR SOFT START STARTER 80AMP

SIEMENS 3RV19-65-2BA0 EXTENDED CABLE TERMINAL FOR 3RV1.6, SEE DESC

SIEMENS 3RU1146-4LB0 OVERLOAD RELAY, 90AMP, 220VDC

SIEMENS 3RT1017-2BB41 RELAY, 4-POLE, 120VAC, 2NO/2NC

SIEMENS 3RT1017-2BB41 RELAY, 4-POLE, 120VAC, 2NO/2NC

SIEMENS 3RN1062-1CW00 THERMISTOR SENSOR, MODULE, 24-240VAC/DC

SIEMENS 3RB20262QB0 RELAY, OVERLOAD, 600VAC, 50/60HZ, B600/R300

SIEMENS 5SY4110-7 1 POLE 15MM CIRCUIT BREAKER 230-400V

SHAWMUT 69182 POWER DISTRIBUTION BLOCK, 600V, 170AMP, 2-POLE

SEW EURODRIVE MDX61B0040-5A3-?4-0T MOVIDRIVE, DRIVE CONTROL UNIT

SCHNEIDER ELECTRIC LC1D09BD 3 POLE CONTACTOR 24VDC 4KW/400V 5HP/480V

SCHNEIDER ELECTRIC 60107 MINI CIRCUIT BREAKER, C60, 6 AMP, 240VDC

SCHNEIDER ELECTRIC 140 XBP 010 00 TSX QUANTUM BACK PLANE

ROCKWELL AUTOMATION AK-R2-360P500 SERIES A DYNAMIC BRAKE RESISTOR

RITTAL TS 8800.080 CABLE ENTRY PLATES 800MM WIDTH

RITTAL TS 4697.000 DEPTH RAIL FOR 800MM ENCLOSURE, SEE DESC