Interview Questions.

Top 100+ Programmable Logic Controller (plc) Interview Questions And Answers

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Top 100+ Programmable Logic Controller (plc) Interview Questions And Answers

Question 1. What Are The Plc Ranges Available In Rockwell?

Answer :

Pico: Non modular small PLCs
Micrologix a thousand, 1200 and 1500 Series
SLC: SLC 5/01, five/02, 5/03 ….
Control Logix Flex Logic and Soft PLC
Question 2. What Is The Software Used With Ab?

Answer :

For Pico smooth for Pico PLC programming
RS Logix 500 for Micrologix and SLC PLCs programming
RSLogix 5000 for Controllogix PLCs programming
SCADA – RS View in advance Control View
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Question three. What Is Use Of Rs Linux Software?

Answer :

RS Linux software program is used to perform following responsibilities:

Configure verbal exchange drivers
View configured drivers and energetic nodes
Enable communication duties along with uploading, downloading, going on-line, updating firmware and sending messages.
Question 4. What Is Use Of Rs Logix Software?

Answer :

RS Logix is PLC programming software program. It contains all of the commands needed for PLC programming. We can increase the program, down load / add the program, work on-line / off line and pressure the I/Os the usage of the software.

RS Logix 500 is used for Micrologix and SLCs
RS Logix 5000 is used for Control Logix PLCs
Question 5. How To Creating Linkage Between Plcs And Plc Programming Software?

Answer :

The RS Linux software program is used for linking the PLC and software Either you can manually configuration the conversation settings or By the use of Auto Configure facility the software program will stumble on the communication settings robotically.

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Question 6. What Is The Meaning Of Upload And Download?

Answer :

Upload approach moving the program statistics from PLC to PC.

Download approach transferring the program facts from PC to PLC.

Question 7. What Are The Various Communication Interfaces Supported By Ab?

Answer :

The typically used communication protocol in AB includes DH+, DH485, ETH, Modbus, Device Net and Control Net.

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Question eight. Give Information About Dh, Control Net, Device Net And Ethernet Protocol?

Answer :

Data Highway: The proprietary records community utilized by Allen Bradley PLCs to communicate information to and from other PLCs on the network or to and from host computers connected to the community.

Control Net: A real-time, manage-layer network providing high-velocity delivery of both time- crucial IO facts and messaging statistics, such as upload/down load of programming and configuration data and peer-to-peer messaging, on a single physical media link

Device Net: A low-value verbal exchange link that connects industrial gadgets to a network. It is primarily based on broadcast-orientated communique protocol – the Controller Area Network (CAN).

Ethernet: The wellknown for local communications networks developed jointly by using Digital Equipment Corp., Xerox, and Intel. Ethernet baseband coaxial cable transmits statistics at hastens to ten megabits per 2nd. Ethernet is used because the underlying delivery automobile via several top-stage protocols, consisting of TCP/IP.

Question nine. What Is Latency In Communication?

Answer :

The put off time between the end of 1 verbal exchange and the begin of another. During this time, the approaches associated with the communique are hung up and can not preserve. The latency needs to be minimal.

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Question 10. How The Communication Protocols Are Distinguished?

Answer :

The protocols are outstanding with following specifications

No. Of nodes supported, total network period, Speed of verbal exchange.
Question eleven. Is Allen Bradley Rockwell?

Answer :

Allen–Bradley is the emblem-call of a line of Factory Automation Equipment synthetic by means of Rockwell Automation (NYSE ROK).

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Question 12. What Is Rslogix?

Answer :

The RSLogix™ own family of IEC-1131-compliant ladder logic programming applications helps you maximize overall performance, shop assignment development time, and enhance productivity.

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