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Sonalika
Sonalika
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Region: BD
Monday 28 September 2026 04:49:43 GMT
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user1jv2vmpn53
ইমানের পিচ্চি আম্মু :
🥰🥰🥰
2026-10-07 12:31:10
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farayajislam4
পঞ্চগড়ের ছেলে আমি 😊 :
💞💞💞
2026-09-28 13:44:51
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amanli908
Emon Ali :
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2026-09-28 04:51:21
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أكبر من الالكترونن #مدرسة #شرح #fyp #fypシ #capcut
أكبر من الالكترونن #مدرسة #شرح #fyp #fypシ #capcut
13 de maio..
13 de maio..
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#ikoh #ikohroz
200gram 8/10 with 2by6 100k Contact : +2348163431719 #hairbyhairboy
200gram 8/10 with 2by6 100k Contact : +2348163431719 #hairbyhairboy
Marino Tech Academy Empowering Seafarer's Through Knowledge Topic: “CONTROL ROOM SAYS OPEN… BUT THE VALVE IS CLOSED! 😱” 1. The control room shows VALVE OPEN. The PLC receives the command, the OPEN indication appears on the screen, and there’s no obvious alarm. But when someone checks locally—the valve is still completely CLOSED. How is that possible? 2. First, don’t assume that an OPEN indication means the valve actually moved. The PLC normally depends on a feedback signal from a limit switch or position transmitter to determine the valve position. 3. Now check the valve locally. Did the actuator actually receive its electrical, pneumatic, or hydraulic command? If the actuator never moved but the PLC already shows OPEN, start questioning the feedback circuit. 4. A stuck or misadjusted limit switch, shorted feedback wiring, faulty relay contact, incorrect position signal, or PLC input problem can create a false OPEN indication. The automation system may be receiving confirmation even though the valve never reached that position. 5. The lesson: command, feedback, and actual valve position are not the same thing. Always verify the physical condition before trusting the screen during critical operations. This is Marino Tech Academy—Empowering Seafarers Through Knowledge.
Marino Tech Academy Empowering Seafarer's Through Knowledge Topic: “CONTROL ROOM SAYS OPEN… BUT THE VALVE IS CLOSED! 😱” 1. The control room shows VALVE OPEN. The PLC receives the command, the OPEN indication appears on the screen, and there’s no obvious alarm. But when someone checks locally—the valve is still completely CLOSED. How is that possible? 2. First, don’t assume that an OPEN indication means the valve actually moved. The PLC normally depends on a feedback signal from a limit switch or position transmitter to determine the valve position. 3. Now check the valve locally. Did the actuator actually receive its electrical, pneumatic, or hydraulic command? If the actuator never moved but the PLC already shows OPEN, start questioning the feedback circuit. 4. A stuck or misadjusted limit switch, shorted feedback wiring, faulty relay contact, incorrect position signal, or PLC input problem can create a false OPEN indication. The automation system may be receiving confirmation even though the valve never reached that position. 5. The lesson: command, feedback, and actual valve position are not the same thing. Always verify the physical condition before trusting the screen during critical operations. This is Marino Tech Academy—Empowering Seafarers Through Knowledge.
#busega #kibumboro #majjeug
#busega #kibumboro #majjeug

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