Belajar PLC dan SCADA

Just another Blog about Programmable Logic Controller & SCADA.

FAQ: Battery Backup for EEPROM - OMRON PLC

Written by Kang Abu on 10:00 PM


Is a battery for EEPROM memory backup required when using an EEPROM Memory Cassette with C200HS or C200HX/HG/HE Programmable Controllers?


 No, the EEPROM Memory Cassette does not require a battery.



Can a single sensor output be connected to multiple Programmable Controllers Input Units in parallel?


 The conditions for setting up this type of connection are as follows:

1.The sum of the total input currents of the Input Units must be below the maximum switching capacity of the transistor in the sensor output.

2.The leakage current from the transistor in sensors output may prevent the inputs to the Input Units from turning OFF. You must be sure that the inputs will turn OFF when sensors output turns OFF.
As a condition for this, the input impedance of the Input Unit and the leakage current can be used to calculate the voltage when the sensor output is OFF. You must be sure that this voltage is less than the OFF voltage of the Input Unit.

3.Sensors signal must be long enough to be detected by the Input Units. The ON/OFF signal from Sensors must be longer than the Programmable Controllers' scan time.

The following formula must be satisfied by the above conditions.

Sum of all leakage currents < Maximum switching capacity of transistor in sensors output

The leakage currents of the pulse output for the transistor in the sensor pulse output when it is turned OFF will not cause the Programmable Controllers input circuit to turn OFF (i.e., satisfies the following condition).
Leakage current of output transistor when OFF x Input impedance of input circuit on Programmable Controllers < Voltage at which Programmable Controllers input turns OFF

The Programmable Controllers must be able to detect the sensor’s ON/OFF signal.
Shorter of ON or OFF signal for sensor/pulse output > Length of one Programmable Controllers scan



Can a single-phase motor be controlled by a 3G3EV Inverter with a single-phase 100-V input?


 No, a single-phase motor cannot be used. Doing so will cause a failure.

The Inverter creates a virtual alternating current with high-speed switching.

If the Inverter is connected to a single-phase capacitor-start induction motor, the capacitor will overheat and burn due to repetitive charging and discharging, so do not connect to this kind of motor.

In addition, if the Inverter is connected to a split-phase-start induction motor or repulsion-start induction motor, the motor's internal centrifugal switch will not operate, and the starting coil may overheat, so do not connect these kinds of motors. Use a three-phase motor.

Related Posts by Categories

Widget by Hoctro | Jack Book
Related Posts with Thumbnails

Our Advertising

Bantuan Pencarian

Jika anda seorang pemula dan tertarik untuk belajar PLC silahkan cek artikel di arsip artikel atau gunakan bantuan pencarian artikel di bawah ini. TQ Bro..

Email Subscribe

Dapatkan informasi dan artikel yang update dari situs ini. Jika anda barminat silahkan masukan email address anda di bawah ini. Terimakasih! (Please write email to subscribe our news).

Enter your email address:

Delivered by FeedBurner

Disclaimer (Privacy Policy)

No PDF Files stored in this site. are not responsible if you download and distribute files or links. Noted that not related in any way with upload files with a copyright material that available for download. Just we collects the information using google search and other search engines links hosted or posted by other website. The link Free Book Download available here are for EDUCATIONAL PURPOSES ONLY... and its recommended to buy the products from the original Owner or Publisher.

For Detail Please Click Here!

Jika anda mempunyai artikel sepurtar dunia automation (PLC dan SCADA) dan ingin sharing buat teman-teman blogger silahkan kirim ke

Jika anda menginginkan semua berita yang ada disitus dan links yang ada di situs ini menjadi bagian dari situs yang anda punyai silahkan masukan address ini (copy & paste): di fungsi RSS Feeder situs anda.