Question 1

Where I can find Window 10 supported PLC USB Driver Suite version 3.18 IE28.

Accepted Answer

Use the attachment to download window 10 supported PLC USB Driver version 3.18 IE28.

Question 2

Type 2 coordination chart with MPCB at 415V

Accepted Answer

Find the attachment for the type 2 coordination chart for mpcb at 415 V.keywords: type2, coordination, mpcb, selection chart, DOL motor starter.

Question 3

Modbus Register address required for EM6400 meter ?

Accepted Answer

Please refer attached modbus register list for EM6400 series meters.

Question 4

Data sheet for meters DM6100, DM6300

Accepted Answer

Please find the attachment to download the data sheet for DM6100 and DM6300 meters.

Question 5

What is the function of bypass switch in Easy UPS 3S system?

Accepted Answer

A static bypass switch automatically and instantaneously transfers the load to the mains electricity supply when there’s an internal fault or failure with the UPS system. It is a common characteristic of an online UPS. In effect, running on bypasses the UPS circumvents (i.e., rectifier, batteries, and inverter) and ensures power continuity while the UPS is fixed or swapped out.This is known as a ‘safe failure to mains’ and occurs for various reasons, such as a fault within the UPS or an overload (short-circuit). Once the fault is cleared, the bypass automatically transfers the load back to the UPS.However, operating on bypass does not filter or condition the input or output supply as with typical double conversion online UPS systems, so should be used sparingly. Internal static bypass switches should not be confused with external maintenance bypass switches. This is an option that enables the UPS to be powered down manually for maintenance while the critical load is powered directly from the mains. External maintenance bypass switches tend to be mechanical in the form of a wraparound or rotary switch or a set of circuit breakers. Line Interactive and Offline UPS systems do not typically incorporate internal automatic bypasses. An alternative solution is to install an external maintenance bypass with an automated transfer feature. This automatically transfers the load to the mains if the UPS fails.Examples Of Static and Maintenance Bypass in A UPS SystemStatic Bypass Mode:The UPS supplies the load with power from the bypass source. If the conditions for normal or battery mode are not met, the load will be transferred from the inverter to the bypass source with no interruption in power to the load. Maintenance Bypass Mode: In maintenance bypass mode, the mains are sent via the external MBB to the load. Battery backup is not available in maintenance bypass mode.

Question 6

What steps I need to follow to upgrade OFS Server version 3.31 to version 3.50.

Accepted Answer

For upgrading the OFS Server version there is a simple procedure. Open the project backup in version 3.31 then you need to first take the backup of the project in old version as follows:

Go to File menu-->Save Archive As--> and save the archive of your project in XML format. It will store the backup of all the existing project.

Then Upgrade your OFS then you will be able to open your archive by just opening it from File and the Open. When you first opens your upgraded OFS version then it will automatically ask for importing the configuration settings from the previous versions.

Your license will get retained whenever you upgrade your OFS but if you uninstall and then reinstall your license will get lost. Thus we recommend you to only upgrade your project not uninstall and then reinstall.

Question 7

What is Modbus and How does it work?

Accepted Answer

What is Modbus? Modbus is a serial communication protocol developed by Modicon published by Modicon® in 1979 for use with its programmable logic controllers (PLCs). In simple terms, it is a method used for transmitting information over serial lines between electronic devices. The device requesting the information is called the Modbus Client and the devices supplying information are Modbus Servers. In a standard Modbus network, there is one Client and up to 247 Servers, each with a unique Server Address from 1 to 247. The Client can also write information to the Servers.The official Modbus specification can be found at https://modbus.org/ What is it used for? Modbus is an open protocol, meaning that it's free for manufacturers to build into their equipment without having to pay royalties. It has become a standard communications protocol in industry, and is now the most commonly available means of connecting industrial electronic devices. It is used widely by many manufacturers throughout many industries. Modbus is typically used to transmit signals from instrumentation and control devices back to a main controller or data gathering system, for example a system that measures temperature and humidity and communicates the results to a computer. Modbus is often used to connect a supervisory computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems. Versions of the Modbus protocol exist for serial lines (Modbus RTU and Modbus ASCII) and for Ethernet (Modbus TCP). How does it work? Modbus is transmitted over serial lines between devices. The simplest setup would be a single serial cable connecting the serial ports on two devices, a Client and a Server. The data is sent as series of ones and zeroes called bits. Each bit is sent as a voltage. Zeroes are sent as positive voltages and a ones as negative. The bits are sent very quickly. A typical transmission speed is 9600 baud (bits per second). What is hexadecimal? When troubleshooting problems, it can be helpful to see the actual raw data being transmitted. Long strings of ones and zeroes are difficult to read, so the bits are combined and shown in hexadecimal. Each block of 4 bits is represented by one of the sixteen characters from 0 to F. Each block of 8 bits (called a byte) is represented by one of the 256 character pairs from 00 to FF. How is data stored in Standard Modbus? Information is stored in the Server device in four different tables. Two tables store on/off discrete values (coils) and two store numerical values (registers). The coils and registers each have a read-only table and read-write table. Each table has 9999 values. Each coil or contact is 1 bit and assigned a data address between 0000 and 270E. Each register is 1 word = 16 bits = 2 bytes and also has data address between 0000 and 270E. Coil/Register Numbers can be thought of as location names since they do not appear in the actual messages. The Data Addresses are used in the messages. For example, the first Holding Register, number 40001, has the Data Address 0000. The difference between these two values is the offset. Each table has a different offset. 1, 10001, 30001 and 40001. What is the Server ID? Each server in a network is assigned a unique unit address from 1 to 247. When the client requests data, the first byte it sends is the Server address. This way each server knows after the first byte whether or not to ignore the message. What is a function code? The second byte sent by the Client is the Function code. This number tells the server which table to access and whether to read from or write to the table. What is a CRC? CRC stands for Cyclic Redundancy check. It is two bytes added to the end of every modbus message for error detection. Every byte in the message is used to calculate the CRC. The receiving device also calculates the CRC and compares it to the CRC from the sending device. If even one bit in the message is received incorrectly, the CRCs will be different and an error will result. . What are the formats of Modbus commands and responses? What are data types? The example for FC03 shows that register 40108 contains AE41 which converts to the 16 bits 1010 1110 0100 0001 Great! But what does it mean? Well, it could mean a few things. Register 40108 could be defined as any of these 16-bit data types: A 16-bit unsigned integer (a whole number between 0 and 65535) register 40108 contains AE41 = 44,609 (hex to decimal conversion) A 16-bit signed integer (a whole number between -32768 and 32767) AE41 = -20,927 (hex to decimal conversion that wraps, if its over 32767 then subtract 65536) A two character ASCII string (2 typed letters) AE41 = ® A A discrete on/off value (this works the same as 16-bit integers with a value of 0 or 1. The hex data would be 0000 or 0001) Register 40108 could also be combined with40109 to form any of these 32-bit data types: A 32-bit unsigned integer (a number between 0 and 4,294,967,295) 40108,40109 = AE41 5652 = 2,923,517,522 A 32-bit signed integer (a number between -2,147,483,648 and 2,147,483,647) AE41 5652 = -1,371,449,774 A 32-bit double precision IEEE floating point number. This is a mathematical formula that allows any real number (a number with decimal points) to represented by 32 bits with an accuracy of about seven digits. AE41 5652 = -4.395978 E-11 Here is a spreadsheet IEEE float calculator for inputs of 4 bytes or 2 words. To download a copy, right click and select Save Target As... A four character ASCII string (4 typed letters) AE41 5652 = ® A V R More registers can be combined to form longer ASCII strings. Each register being used to store two ASCII characters (two bytes). What is byte and word ordering? The Modbus specification doesn't define exactly how the data is stored in the registers. Therefore, some manufacturers implemented modbus in their equipment to store and transmit the higher byte first followed by the lower byte. (AE before 41). Alternatively, others store and transmit the lower byte first (41 before AE). Similarly, when registers are combined to represent 32-bit data types, Some devices store the higher 16 bits (high word) in the first register and the remaining low word in the second (AE41 before 5652) while others do the opposite (5652 before AE41) It doesn't matter which order the bytes or words are sent in, as long as the receiving device knows which way to expect it. For example, if the number 29,235,175,522 was to be sent as a 32 bit unsigned integer, it could be arranged any of these four ways. AE41 5652 high byte first high word first 5652 AE41 high byte first low word first 41AE 5256 low byte first high word first 5256 41AE low byte first low word first What is a Modbus Map? A modbus map is simply a list for an individual server device that defines - what the data is (eg. pressure or temperature readings) - where the data is stored (which tables and data addresses) - how the data is stored (data types, byte and word ordering) Some devices are built with a fixed map that is defined by the manufacturer. While other devices allow the operator to configure or program a custom map to fit their needs. What is the difference between Modbus ASCII and Modbus RTU? Modbus RTU and Modbus ASCII talk the same protocol. The only difference is that the bytes being transmitted over the wire are presented as binary with RTU and as readable ASCII with Modbus RTU. important to note about RTU is that the RTU message does not have a Start_of_text indication. The receiving party in the communications uses a "silent" time in order to determine the start of a new message. ASCII does have a start-of-text token. Binary messages are shorter than ASCII and therefore theoretically faster to transmit/receive. You may be happy to see update rates of about 100 ms in your HMI/SCADA and could choose either communication.Summary:- use RTU is possible- use ASCII in case RTU is giving timeout problems on WinNT or when using slow communications media like 300 bps or dialup modems Most OPC Servers for Modbus support ASCII as well as RTU communications.. What are extended register addresses? Since the range of the analog output holding registers is 40001 to 49999, it implies that there cannot be more than 9999 registers. Although this is usually enough for most applications, there are cases where more registers would be beneficial. Registers 40001 to 49999 correspond to data addresses 0000 to 270E. If we utilize the remaining data addresses 270F to FFFF, over six times as many registers can be available, 65536 in total. This would correspond to register numbers from 40001 to 105536. Many modbus software drivers (for Client PCs) were written with the 40001 to 49999 limits and cannot access extended registers in server devices. And many server devices do not support maps using the extended registers. But on the other hand, some server devices do support these registers and some Client software can access it, especially if custom software is written. How does 2-byte server addressing work? Since a single byte is normally used to define the server address and each server on a network requires a unique address, the number of server on a network is limited to 256. The limit defined in the modbus specification is even lower at 247. To get beyond this limit, a modification can be made to the protocol to use two bytes for the address. The client and the servers would all be required to support this modification. Two byte addressing extends the limit on the number of servers in a network to 65535. By default, the Simply Modbus software uses 1 byte addressing. When an address greater than 255 is entered, the software automatically switches to 2 byte addressing and stays in this mode for all addresses until the 2 byte addressing is manually turned off. How can you send events and historical data? Enron Modbus includes commands for moving events and historical data.. What is Enron Modbus? Enron Modbus is a modification to the standard Modicon modbus communication protocol developed by Enron Corporation. See Enron Modbus for details.

Question 8

Modbus register address list for iEM3000 series meters.

Accepted Answer

Kindly find the attachment below:

Question 9

How to differentiate power consumption & power dissipation .

Accepted Answer

The power Consumption in VA is Bus Current * Voltage And the Power dissipation is "lost" or wasted power, represented by the power converted to lower forms such as heat that are no longer useful in that system. In relation to a power supply the dissipated power is the difference between the input and the output power, as the rest is wasted or dissipated. So power dissipation is not fixed for these hardware but what we can say is it will be approx. 10% of Power consumption on full load. Just for an example for TM3DI16 – typical power consumption is 7mA at nominal supply 24 VDC from External power supply When all inputs are ON, current drawn on internal 5VDC bus is 40 mA => For External power supply , power consumption is (24 VDC x 0.007 A) = 0.168 Watts ( not 1.68) : this value is so low we can nearly forget it when sizing the 24V external power supply For 5VDC internal bus supply, power consumption is (5VDC x 0.04) = 0.2 Watts; yes but this characteristic is not so important, as the 5V is provided internally by the PLC itself , and as this module has very low consumption within 5V, this create never a problem to have this module into the TM3 configuration ( from 5V point of view)

Question 10

What is Rated short-time withstand current: Ik (A)?

Accepted Answer

This is the rms value of the current which the switchgear can carry in the closed position during a specified short time. Short time is generally 1 s, and sometimes 3 s.

Question 11

What is the difference between the REFLEX mode and the POLARISED REFLEX mode on photo-electric sensors?

Accepted Answer

Note that we no longer sell these devices, this FAQ is for information only. Both systems comprise a transmitter and receiver (usually within a single-body sensor), and a reflector. The transmitter sends a beam which is bounced back by the reflector and detected by the receiver. An object passing through the beam blocks the reflection and triggers the sensing signal.REFLEX mode sensors may not be suitable for detecting reflective objects, as a shiny target may bounce the beam back to the sensor in the same way as the reflector. The sensor may not be able to tell the difference between the target and reflector and will therefore fail to detect the object. For maximum effectiveness the targets should be opaque or near opaque and should not be highly reflective in nature. However, the advantage of reflex mode sensors is that they give relatively long sensing distances.POLARISED REFLEX mode sensors have polarising filters over both the transmitter and receiving sensor. The filters are at 90 deg to each other which means that the receiver cannot see the transmitted beam as it will be blocked by the receiver filter. The reflector turns the polarised light waves through 90 deg so that the receiver can see them. Light bouncing off other objects is not rotated so it will not trigger the sensor. This means that the polarised reflex can be used to detect very reflective surfaces, even mirrors, polished metal and semi transparent materials. However, the sensing distance is shorter than REFLEX.

Question 12

What is Rated Transient Recovery Voltage (TRV)?

Accepted Answer

This is the voltage that appears across the terminals of a circuit breaker pole after the current has been interrupted. The recovery voltage wave form varies according to the real circuit configuration. A circuit breaker must be able to break a given current for all transient recovery voltages whose value remains below the rated TRV.

Question 13

What Is Tropicalization and tropicalization category T2 with respect to IEC 60068 standard?

Accepted Answer

The Tropicalization term is related to the damp heat environmental conditions.
It means the product have been internally testing based on damp heat cycling test according to IEC 60068-2-30 Std (Test Db) as per severity 2 : cyclic test at 55°C and 95% relative humidity, two 24h cycles (12h + 12h).”

Question 14

How can I cable to the PNP and NPN type outputs for sensors / detectors, using the wiring diagram?

Accepted Answer

PNP and NPN type outputs are available as 3-wire sensors with a DC voltage power supply (the voltage limits are dependent on the specific sensor): PNP type: switching on the positive voltage load NPN type: switching on the negative voltage load These outputs are typical of photoelectric detectors, inductive proximity and other types of sensors.For a detailed explanation of PNP vs NPN, see the following FAQ: FA142566 PNP output The load (relay coil, contactor relay input, PLC input) must be connected between the "-" negative terminal and the midpoint. The corresponding PLC input is Sink. NPN output The load must be connected between the "+" positive terminal and the midpoint. The corresponding PLC input is Source. Some sensors have two PNP and NPN outputs (4-wire sensors) which are wired according to the diagram below.Note that we no longer sell sensors. Telemecanique Sensors, who were previously part of the Schneider Electric brand, were sold in 2023. You can go to their website - www.telemecaniquesensors.com - for more information, including contact details.

Question 15

We are having issue regarding web deployment, any changes made in SCADA at server is not reflected at web client screen during compiling the new project , some warning and message Failed to create web deployment files shows.

Accepted Answer

There is an issue in Vijeo Citect v7.20, where the parameter [WebServer]deployRoot does not recognize as a valid value a path enclosed in double quotes.
As a workaround, please use an access path without spaces in it, and do not enclose it in double quotes. e.g. [WebServer]DeployRoot=C:\\temp\\deploy. or install the latest service pack 4 as this issue has been fixed in the service pack.

Question 16

What is the selection criterion of Circuit Breakers for the Capacitor bank application.

Accepted Answer

The selection should be done after derating the Circuit Breaker taking into consideration voltage variation and capacitors tolerances that could increase nominal current up to 1.5In. The Derating factor of 1.5In Where In = Q/ ( Square root of 3 ) Un Q = Capacitor Power Un = Nominal Voltage Choose the Micrologic with delay time selection, so that the Circuit Breaker does not trip due to initial high inrush current. Also to be taken into account are the parameters like supply frequency, operating voltage & harmonics level of the power system for such application. Refer the attached sheet for further details for selection of Circuit Breaker for Capacitor duty application. Note: Use the phase barrier between the phases in Circuit Breaker to prevent flashover due to heavy inrush current.