Forum Weekly
05 Sep. 2025
This week’s exciting content:
1. Follow-up on PLC remote maintenance and debugging: Keywords, Siemens PLC VPN remote connection.
2. In 2025, how do you map and use IO points in PLC programming?
3. Encountering strange issues with Xinjie XDM
5. Issues with inverter output current
6. Schneider ATV610 inverter output voltage differs by about 30V, causing significant motor vibration and failure to start
7. After long use of servo motors, should the automatic tuning response parameters be adjusted due to mechanical influences?
Previous Highlights▼
Issue 704 | ABB/ACH580 Troubles; A terrifying hour trapped in an elevator; Issues with indicator light button switches
Issue 703 | Siemens MM440-11KW random shutdown without alarm during operation; Today I was shocked by 500V…
Issue 702 | Air conditioning repair – the cost of laziness; Standards for wire diameter detection; Omron CP1H series PLC encapsulation function block using indexed registers
Issue 701 | A factory’s electromagnetic heating device frequently explodes; Why should the electric meter wire use 4 square mm?; Will cumulative errors occur if the servo pulse equivalent cannot be divided evenly?
Issue 700 | Old sayings, selection of braking resistors for inverters; A post on Xinjie PLC repair and disassembly
Issue 699 | A puzzling electrical fault; Why can’t the inverter handle large loads?
Issue 698 | Why doesn’t touching the grounding flat iron on the transformer side with 210V electric shock you?
Issue 697 | Disassembling a Tamagawa 2500-line incremental encoder; What are the reasons for an inverter to report overcurrent as soon as it starts?
Issue 696 | This domestic imitation of FX3U has some issues during operation and debugging; The simplest method to judge software quality under amateur conditions
Issue 695 | A classic case of small equipment repair; The review exam for electrician certificates is becoming increasingly cumbersome
Issue 694 | Breaking open an antique circuit breaker from Schneider; InTouch and Omron CJ2M Ethernet communication; I really can’t believe it, a simple calculation error
Issue 693 | Omron NX1P2 non-protocol serial communication master station video tutorial; How to rescue a starving lithium battery!
Issue 692 | Being serious, does a 2500-line encoder really have 2500 lines?
Issue 691 | Compilation of video tutorials on STM32 microcontroller Modbus TCP/RTU/ASCII communication
Issue 690 | Confusion about PID control of hydraulic pumps in Omron PLC!
Issue 689 | A glance at the lifespan of domestic inverters!
Issue 688 | Asking about Schneider ATV610 reporting SCF1 (motor short circuit) and INFR (internal error 27 repair ideas)
Issue 687 | A crane with too long a line trips the main contactor under load, happening dozens of times a day, what’s going on?
Issue 686 | Using Liko configuration software and STM32 microcontroller to achieve Modbus RTU serial communication
Issue 685 | An early infinite loop on-off timer (relay) compared to a modern timer.Issue 684 | A brief note on modifying the household distribution box
Issue 683 | A cable exploded, suspected to be caused by human factors?Issue 682 | Repair history of the steel neck plate of the ring spinning frame Xiwei SPA AX4 BPM DRIVER servo
Issue 681 | Detailed video tutorial on Modbus RTU communication protocol message format; Siemens TIA Portal V12-19 virtual machine, family package, free download
Issue 680 | Detailed video tutorial on Modbus TCP communication protocol message format; Mitsubishi A740 reporting E.UvT undervoltage is too difficult to handle!
Issue 679 | Just got a job, how to quote?; Can this time relay be used this way? Controlling the power supply of the time relay?
Issue 678 | The battery won’t charge, what could be the cause? Have you encountered this situation; Daily routine of factory maintenance electricians; The most troublesome leakage protector replaced today
Issue 677 | Fixing everything, tool car Corolla SRS light fault repair (airbag light); Fuji inverter CPU separate power supply issue
Issue 676 | Under what circumstances should the wire diameter of the neutral line be the same as that of the live line?; Have you encountered any supernatural events in elevators?
Issue 675 | T1000A 37KW output current 36A, why doesn’t it alarm for phase loss?
Issue 674 | Regarding Mitsubishi servo MR-J2S alarm AL30 issue; Why are Mitsubishi PLC soft component annotations so convoluted?
Issue 673 | HLP-A-2.2KW inverter powers on normally, reports E.OC.A and shielding fault example
Issue 672 | Does this leakage protector still need to be connected in series with an air switch?
Issue 671 | A 75KW inverter burned a sensor at the moment of startup!
Issue 670 | Practice makes perfect—wiring methods for switches and sockets in the bedroom!
Issue 669 | Mitsubishi fx3g PLC data issues, how to judge the value range of multiple registers?
Issue 668 | Huichuan EASY521+660N servo, torque feedback zero point finding (recording process, program attached)
Issue 667 | KV-X310 first experience: “Is var programming mainstream?”
Issue 666 | Simple circuit, bizarre fault, everyone come and take a look!
Issue 665 | What to do if the hidden wire sparks and smokes?
Issue 664 | Improper timing of power-on caused the machine to explode!Issue 663 | How to design safety interlock signals between PLC and robots?; Is it necessary to connect these two IO signals of Yaskawa servo?Issue 662 | The motor just tripped and is overheating, what to do if the multimeter keeps fluctuating when measuring motor resistance?
Click below 【Read Original】
To view the latest complete weekly issue on mobile!