| Acronym | Full-form |
|---|---|
| AB | Allen Bradley or Rockwell (It is one of the types of PLC Brand) |
| ABB | Asea Brown Boveri (It is one of the types of PLC Brand) |
| ABS | Absolute Instruction (It is one of the types of PLC programming instruction) |
| AC | Alternating Current |
| ACC | Accumulate or Accumulator |
| ACK | Acknowledgment |
| ACS | Arc Cosine Instruction (It is one of the types of PLC programming instruction) |
| ADD | Addition Instruction (It is one of the types of PLC programming instruction) |
| AFD | Adjustable Frequency Drive |
| AI | Analog Input |
| AIC | Active Infeed Converter |
| AFE | Active Front End |
| AMD | Advanced Micro Devices |
| ANSI | American National Standards Institute |
| AO | Analog Output |
| API | Application Programming Interface |
| APS | Auxiliary Power Supply |
| ARP | Address Resolution Protocol (It is one of the types of communication protocol) |
| AS | Auto Start |
| ASCII | American Standard Code for Information Interchange |
| ASD | Adjustable speed drive |
| AS-I | Actuator Sensor Interface |
| ASICs | Application-Specific Integrated Circuits |
| ASN | Arc Sine Instruction (It is one of the types of the mathematical Instruction of PLC) |
| ATN | Arc Tangent Instruction (It is one of the types of the mathematical Instruction of PLC) |
| AUI | Attachment Unit Interface |
| B | Bit/Binary |
| BCD | Binary to Decimal Code (Calculator) |
| BHI | Base Hardware Information |
| BNC | Bayonet Nut Connector |
| BOOTP | Bootstrap Protocol (It is one of the types of communication protocol) |
| BSAP | Bristol Standard Asynchrouns Protocol (It is one of the types of communication protocol) |
| BSL | Bit Shift Left |
| BSR | Bit Shift Right |
| C | Counter (It is one of the types of the mathematical Instruction of PLC) |
| CAN | Controller-area Network (It is one of the types of the protocol) |
| CCW | Connected Component Work |
| CDC | Change Data Capture |
| CE | Counting Enabled |
| CFC | Continuous Function Chart |
| CIM | Computer Integrated Manufacturing |
| CIP | Common Industrial Protocol (It is one of the types of communication protocol) |
| CIP | Control and Information Protocol (It is one of the types of communication protocol) |
| CIP | Critical Infrastructure Protection |
| CJ | Conditional Jump Instruction (It is one of the types of PLC programming instruction) |
| CMP | Comparator Instruction (It is one of the types of PLC programming instruction) |
| CMRR | Common-Mode Rejection Ratio |
| CNC | Computer Numerical Control |
| COB | Communication Object |
| COM | Component Object Model/ Common (Based on the Usage) |
| COP | Copy Instruction (It is one of the types of PLC programming instruction) |
| COS | Cosine Instruction (It is one of the types of PLC programming mathematical instruction) |
| COTS | Commercial Off the Shelf |
| CPU | Central Processing Unit |
| CRC | Cyclic Redundancy Check |
| CC | Up Counter or Counter Coil (It is one of the types of counter instruction) |
| CS | Control System or Communications Status |
| CSC | Convertible Static Compensatory |
| CSI | Current Source Inverter |
| CSMA/CD | Carrier Sense Multiple Access/Collision Detect |
| CT | Current Transformer |
| CTD | Down Counter Instruction (It is one of the types of counter instruction) |
| CTU | Up Counter Instruction (It is one of the types of counter instruction) |
| CTUD | Count Up/Down Instruction (It is one of the types of counter instruction) |
| CV | Current Value |
| DB | Data Block |
| DC | Direct Current |
| DCOM | Distributed Component Object Model |
| DCS | Distributed Control System |
| DS | Decelerating Status |
| DDC | Direct Digital Control |
| DEC | Digital Equipment Corporation |
| DEC | Decrement |
| DEC | Digital Equipment Corporation |
| DEG | Degree Instruction (It is one of the types of PLC programming instruction) |
| DH | Data Highway |
| DHCP | Dynamic Host Configuration Protocol |
| DI | Digital Input |
| DIO | Discrete Input/Output |
| DIP | Dual In-line Package |
| DIV | Division Instruction (It is one of the types of mathematical PLC instruction) |
| DIX | Digital Equipment Corp., Intel, and Xerox |
| DLL | Dynamic Link Library |
| DLS | Data Log Status |
| DMS | Database Management System |
| DN | Done Bit |
| DNP3 | Distributed Network Protocol 3 (It is one of the types of communication protocol) |
| DNS | Domain Name Server |
| DO | Digital Output |
| DOL | Direct on Line Starter |
| DOS | Denial of Service |
| DOS | Disk Operating System |
| DP | Decentralized Peripherals |
| DTC | Direct Torque Control |
| EBCDIC | Extended Binary Coded Decimal Interchange Code |
| ECM | Enterprise Contact Management |
| ED | Error Detected |
| EDS | Electronic Data Sheet |
| EII | Event Input Interrupt |
| EEPROM | Electrically Erasable Programmable Read-Only Memory |
| EDM | Electrical Discharge Machining |
| EGD | Ethernet Global Data |
| EIA | Electric Industries Alliance |
| ELCB | Earth-Leakage Circuit Breaker |
| EMC | Electromagnetic Compatibility |
| EMI | Electromagnetic Interference |
| EMP | Electromagnetic Pulse |
| EN | Enable Bit |
| ENC | Encoder |
| EPC | Electrical Power Control |
| EPICS | Experimental Physics and Industrial Control System |
| EQU | Equal to Instruction (It is one of the types of PLC comparator instruction) |
| ER | Error Code |
| ERP | Enterprise Resource Planning |
| ES | Ethernet Status |
| ESD | Electrostatic Sensitive Devices |
| F | Float |
| FB | Function Block |
| FBD | Function Block Diagram |
| FCS | Fuzzy Control System |
| FDDI | Fiber Distributed Data Interface |
| FE | Function Enabled |
| FINS | Factory Interface Network Service Protocol (It is one of the types of communication protocol) |
| FLL | Fill File Instruction (It is one of the types of PLC programming instruction) |
| FOC | Field Oriented Control |
| FOIRL | Fiber Optic Inter Repeater Link |
| FTP | File Transfer Protocol (It is one of the types of communication protocol) |
| GE | General Electric (It is one of the types of PLC Brand) |
| GEQ | Greater than or Equal to Instruction (It is one of the types of PLC comparator instruction) |
| GET | Greater than Instruction (It is one of the types of PLC comparator instruction) |
| GM | General Motor |
| GMII | Gigabit Media-Independent Interface |
| GND | Ground |
| GPIO | General Purpose Input/Output |
| GPS | Global Positioning System |
| GUI | Graphical User Interfaces |
| H | High/Hydraulic |
| HART | Highway Addressable Remote Transducer Protocol (It is one of the types of communication protocol) |
| HMI | Human Machine Interface |
| HP or hp | Horse Power |
| HPI | High Preset Interrupt |
| HPM | High Preset Mask |
| HPR | High Preset Reached |
| HSC | High-Speed Counter |
| HSL | High-Speed Counter Load |
| HSSDC | High Speed Serial Data Connector |
| HTTP | Hypertext Transfer Protocol (It is one of the types of communication protocol) |
| HV | High Voltage |
| HVAC | Heating Ventilation & Air Conditioning |
| I | Input/Integer (Based on the usage) |
| IANA | Internet Assigned Numbers Authority |
| IC | Integrated Chip |
| ICMP | Internet Control Message Protocol (It is one of the types of communication protocol) |
| ICS | Industrial Control System |
| IDB | Instance Data Block |
| IDC | Industrial Development Corporation |
| IEC | International Electrical Commission |
| IEEE | Institute of Electrical and Electronics Engineers |
| IETF | Internet Engineering Task Force |
| IFM | Integrated Function Module |
| IGBT | Insulated Gate Bipolar Transistor |
| IGMP | Internet Group Management Protocol (It is one of the types of communication protocol) |
| IIOT | Industrial Internet of Things |
| IL | Instruction List |
| IM | Interface Module |
| IN | Integer |
| INC | Increment |
| I/O | Input/Output |
| IOS | I/O Status |
| IP | Internet Protocol (It is one of the types of communication protocol) |
| IPV | Internet Protocol Version |
| IS | Idle Status |
| ISA | Industry Standard Architecture/ International Society of Automation |
| ISDN | Integrated Services Digital Network |
| ISO | International Organization for Standardization |
| ISU | IGBT Supply Unit |
| JMP | Jump Instruction (It is one of the types of the PLC programming instruction) |
| JMPN | Jump Not Instruction (It is one of the types of the PLC programming instruction) |
| JSR | Jump to Subroutine Instruction (It is one of the types of the PLC programming instruction) |
| L | Line/Low (based on the usage) |
| LAN | Local Area Network |
| LBL | Lable Instruction (It is one of the types of the PLC programming instruction) |
| LCI | Load Commutated Inverter |
| LCU | Load Control Unit |
| LD or LAD | Ladder Diagram (It is one of the types of the PLC programming languages) |
| LED | Light Emitting Diode |
| LET | Lesser than Instruction (It is one of the types of the PLC programming instruction) |
| LEQ | Less than or Equal to Instruction (It is one of the types of the PLC programming instruction) |
| LIM | Limit Instruction (It is one of the types of the PLC programming instruction) |
| LLC | Logical Link Control |
| LPI | Low Preset Interrupt |
| LPR | Low Preset Reached |
| LQFP | Low- Profile Quad Flat Package |
| LN | Natural Log Instruction (It is one of the types of the PLC programming instruction) |
| LOG | Log to Base 10 Instruction (It is one of the types of the PLC programming instruction) |
| LSB | Least Significant Bit |
| LV | Low Voltage |
| M | Memory |
| MAC | Media Access Control |
| MAU | Media Attachment Unit |
| MC | Cycloconverter or Matrix Converter |
| MCB | Miniature Circuit Breaker |
| MCCB | Molded Case Circuit Breaker |
| MCR | Master Control Relay |
| MCRA | Master Control Relay Activate (It is one of the types of the PLC programming instruction) |
| MCRD | Master Control Relay Deactivate (It is one of the types of the PLC programming instruction) |
| MCR< | Master Control Relay Less (It is one of the types of the PLC programming instruction) |
| MCR> | Master Control Relay Greater (It is one of the types of the PLC programming instruction) |
| MCS | Master Control set Instruction (It is one of the types of the PLC programming instruction) |
| MES | Manufacturing Execution System |
| MIB | Management Information Base |
| MII | Media Independent Interface |
| MMF | Multimode Fiber |
| MMI | Memory Module Information |
| MOV | Metal Oxide Varistor/Move (MOV is one of the types of PLC programming instruction) |
| MPC | Mechanical Power Control |
| MPI | Multi-Point Interface (It is one of the types of the communication protocol) |
| MSB | Most Significant Bit |
| MUL | Multiplication Instruction (It is one of the types of the PLC programming instruction) |
| MV | Medium Voltage |
| N | Negative/Neutral/Node (based on the usage) |
| NAC | Navy Automation Controller |
| NC | Normally Closed |
| NCS | Network Computing System |
| NEMA | National Electrical Manufacturer Associations |
| NERC | North American Electric Reliability Corporation |
| NFS | Network File System |
| NIC | Network Interface Card |
| NO | Normally Open |
| NOT | Not or Inversion or Inverter (It is the one of the types of the logic gates) |
| NPN | Negative-Positive-Negative |
| NRT | Near Real-Time |
| NRZ | Non-Return to Zero |
| NTP | Network Time Protocol (It is one of the types of communication protocol) |
| NVT | Network Viral Terminal |
| O | Output |
| OB | Organisation Block |
| ODT or (S_ODT) | On Delay Timer (It is one of the types of the timer instruction) |
| ODTS or (S_ODTS) | On Delay Extended Timer (It is one of the types of the timer instruction) |
| ODVA | Open Device Net Vendors Association |
| OEM | Original Equipment Manufacturer |
| OF | Overflow |
| OFI | Overflow Interrupt |
| OffDT or (S_OffDT) | Off Delay Timer |
| OFDM | Orthogonal Frequency-Division Multiplexing |
| OLR | Overload Relay |
| OMAC | Open Modular Architecture Controls |
| OMB | Output Mask Bits |
| OPC | OLE for Process Control |
| OPC-UA | Open Platform Communications Unified Architecture |
| OS | Operating System |
| OSGP | Open Smart Grid Protocol (It is one of the types of communication protocol) |
| OSF | One Shoot Fallng Instruction |
| OSR | One Shoot Rising Instruction |
| P | Positive/Pneumatic (Based on the Usage) |
| PAC | Programmable Automation Controller |
| PAD | Portable Application Description |
| PAM | Plant Asset Management |
| PAS | Process Automation System |
| PARC | Palo Alto Research Center |
| PB | Press Button or Push Button |
| PC | Personal Computer |
| PCB | Printed Circuit Board |
| PCI | Peripheral Component Interconnect |
| PCMCIA | Personal Computer Memory Card International Association |
| PCN | Process Control Network |
| PD | Powered Device |
| PDO | Process Data Object |
| PFN | Program File Number |
| PHY | Physical Layer |
| PID | Proportional Integral Derivative |
| PING | Packet Internet Grope |
| PLC | Programmable Logic Controller |
| PLR | Programmable Logic Relay |
| PLS | Programmable Limit Switch |
| PM | Peripheral Module |
| PM | Programmer Monitor |
| PNP | Positive-Negative-Positive |
| PoE | Power over Ethernet |
| PPI | Point to Point (It is one of the types of communication protocol) |
| P2P | Peer to Peer |
| PRE | Preset |
| PROFIBUS | Process Field Bus (It is one of the types of communication protocol) |
| PS | Power Supply |
| PSE | Power Sourcing Equipment |
| PSxT or (S_PSxT) | Pulse Extended Timer |
| PT | Potential Transformer |
| PTO | Profinet Trade Organization or Pulse Train Output |
| PUR | Polyurethane |
| PV | Preset Value |
| PVC | Polyvinyl Chloride |
| PWM | Pulse-width Modulation |
| Q | Output |
| QCS | Quality Control System |
| R | Reset/Rack (Based on the usage) |
| RAC | Reset Accumulated Value |
| RAD | Radian Instruction |
| RAM | Random Access Memory |
| RARP | Reverse Address Resolution Protocol (It is one of the types of communication protocol) |
| RC | Reset Counter |
| Res | Reset |
| RFID | Radio-Frequency Identification |
| RH | Relative Humidity |
| RI | Routing Information |
| RJ | Registered Jack |
| RMON | Remote Monitoring |
| ROM | Read-Only Memory |
| RP | Ramp Profile |
| RPC | Remote Procedure Call |
| RPM | Real-Time Performance Management |
| RQ | Reset Coil |
| RS | Recommended Standard/Reset Set (Fil-flop)/ Run Status (Based on the usage) |
| RST | Reset |
| RT | Real-Time or Timer Reset |
| RTC | Real-Time Clock |
| RTD | Resistance Temperature Detector |
| RTO | Retentive Timer On |
| RTOS | Real-Time Operating System |
| RTPS | Real-Time Publish/Subscribe |
| RTU | Remote Terminal Unit |
| Rx | Receive |
| RZ | Return to Zero |
| S | Set/Status (Based on the usage) |
| SAE | System Architecture Evolution |
| SBR | Subroutine Instruction |
| SCADA | Supervisory Control and Data Acquisition |
| SCP | Scale with Parameter |
| SCR | Silicon Controlled Rectifier |
| SDB | Shared Data Block |
| SDO | Service Data Object |
| SDSP | Smart Distributed System Protocol (It is one of the types of communication protocol) |
| Sec | Second |
| SFB | System Function Block |
| SFC | Sequential Function Chart |
| SIN | Sine Instruction (It is one of the types of PLC programming instruction) |
| SIS | Safety Instrumented System |
| SLC | Smart Link Communication |
| SM | Signal Module |
| SMPS | Switch Mode Power Supply |
| SMTP | Simple Mail Transfer Protocol (It is one of the types of communication protocol) |
| SNA | Systems Network Architecture |
| SNMP | Simple Networking Management Protocol (It is one of the types of communication protocol) |
| SOAP | Simple Object Access Protocol (It is one of the types of communication protocol) |
| SP | Set Parameters |
| SPI | Serial Peripheral Interface |
| SQ | Set Coil |
| SQC | Sequencer Compare Instruction (It is one of the types of PLC programming instruction) |
| SQI | Sequencer Input Instruction (It is one of the types of PLC programming instruction) |
| SQL | Sequencer Load Instruction (It is one of the types of PLC programming instruction) |
| SQO | Sequencer Output Instruction (It is one of the types of PLC programming instruction) |
| SQRT | Square Root Instruction (It is one of the types of PLC programming instruction) |
| SR | Set Reset (Fil-flop) |
| SRTP | Service Request Transport Protocol (It is one of the types of communication protocol) |
| SS | Selector Switch |
| SSID | Service Set Identifier |
| SSL | Server-Side Language |
| SSR | Solid State Relay |
| ST | Structured Text or String |
| STEP | Siemens Technical Education Program |
| STI | Selectable Time Interrupt |
| STP | Shielded Twisted Pair |
| SUB | Subtraction Instruction (It is one of the types of PLC programming instruction) |
| SUS | Suspend Instruction (It is one of the types of PLC programming instruction) |
| SVPWM | Space Vector Pulse Width Modulation |
| T | Trigger/Timer (Based on usage) (Timer is one of the types of PLC programming instruction) |
| TAN | Tangent Instruction (It is one of the types of PLC programming instruction) |
| TCI | Tag Control Info |
| TCP | Transmission Control Protocol (It is one of the types of communication protocol) |
| TFTP | Trivial File Transfer Protocol (It is one of the types of communication protocol) |
| TIA | Telecommunications Industry Association |
| TIA | Totally Integrated Automation |
| THD | Total Harmonic Distortion |
| TLS | Transport Layer Security |
| TND | Temporary End Instruction |
| TON | On Delay Timer |
| TOFF | Off Delay Timer |
| TOS | Type of Service |
| TPR | Time Pulse Repeat |
| TRIAC | Triode for Alternating Current |
| TT | Timer Timing Bit or Timer Trigger |
| TTL | Transistor-Transistor Logic/Time to Live (Based on the Usage) |
| TV | Time Variable |
| Tx | Transmit-Out |
| UCMM | Unconnected Message Manger |
| UDP | User Datagram Protocol (It is one of the types of communication protocol) |
| UF | Underflow |
| UFI | Underflow Interrupt |
| UFM | Underflow Mask |
| UIE | User Interrupt Enable |
| UIX | User InterrupT Executing |
| UIL | User Interrupt Lost |
| UIP | User Interrupt Pending |
| UNIX | Uniplexed Information and Computing System |
| UPS | Uninterruptible Power Supply |
| USB | Universal Serial Bus |
| UTP | Unshielded Twisted-Pair |
| VAC | AC (Alternating Current) Voltage |
| VDC | DC (Direct Current) Voltage |
| VFD | Variable Frequency Drive |
| VIN | Vehicle Identification Number |
| VPN | Virtual Private Network |
| VSAT | Very Small Aperture Terminal |
| VSD | Variable Speed Drive |
| VSI | Voltage Source Inverter |
| VVVF | Variable Voltage Variable Frequency |
| W | Word |
| DW | Double Word |
| WAN | Wide Area Network |
| WEP | Wired Equivalent Privacy |
| WPA | WiFi Protected Access |
| WPAN | Wireless Personal Area Networks |
| X | Input (PLC Program Input) |
| XML | Extensible Markup Language |
| XOR or EX-OR | Exclusive OR Gate |
| XNOR or EX-NOR | Exclusive NOR Gate |
For Example:
What does PLC stand for?
PLC stand for "Programmable Logic Controller".
You can use this as short hand industrial automation dictionary. And you can read more Electrical and Electronic Abbreviations.
In industrial automation study we used different short abbreviations.
I’m listing down those abbreviations in alphabetical order. Along with the full form, some of the abbreviations are linked to an article that will describe that terminology in detail like definitions, formulas, and usages.
I have completed master in Electrical Power System. I work and write technical tutorials on the PLC, MATLAB programming, and Electrical on DipsLab.com portal.
Sharing my knowledge on this blog makes me happy. And sometimes I delve in Python programming.
Mam, I think AFD is not correct, it is VFD (Variable frequency drive).
Both are correct, Pankaj. AFD stands for the “Adjustable-frequency drive”.
Sometimes, AFD is called as “Variable-frequency drive (VFD)”.