Power supply wiring: S7-1200PLC power terminal L+ connects to the switch power supply +V, terminal M connects to the switch power supply -V. PLC's 3L+ connects to +V, 3M connects to -V.
Output wiring: 3L+ is connected to +V, 3M is connected to -V. Terminal 14 of the intermediate relay KA1 coil is connected to the output terminal Q0.0 of the PLC, and terminal 13 of the intermediate relay coil is connected to the M terminal (0V). Terminal 14 of the intermediate relay KA2 coil is connected to the output terminal Q0.0 of the PLC, and terminal 13 of the intermediate relay coil is connected to the M terminal (0V).
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Recommended ReadingLatest update time:2024-11-16 09:38
GOTO jump instruction of Siemens TIA Portal SCL
Using the "Jump" instruction, you can continue program execution from a specific point marked with a jump label.
The jump label and the "jump" instruction must be in the same block. In a block, the name of a jump label can only be specified once. Each jump label can be the target of several jump instructions.
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SIMATIC S7-1500 PLC communication and its application - PROFIBUS structure and type
PROFIBUS Communication Overview
PROFIBUS is Siemens' fieldbus communication protocol and one of the fieldbus standards in the IEC61158 international standard. The fieldbus PROFIBUS meets the important requirement of field-level data accessibility in the production process. On the one hand, it covers the communi
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PLC field example electrical schematic diagram explanation
Reduced Voltage Starting Control of Three-phase Asynchronous Motor
1. Y-△ step-down starting control of three-phase asynchronous motor
The relay contactor control of the Y-△ step-down starting of the three-phase asynchronous motor is transformed into a PLC control system.
(1) Determine the I/O signal
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About PLC programming applications and diagnosis
1. Electrical knowledge
Which skill is the most basic and important for electrical engineers? In addition to electrical engineering knowledge, there is nothing else. Many people who have engineering experience in large state-owned enterprises know that the drawings of the design institute often cannot match the
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Modbus to Profinet gateway connects the inverter to the PLC
Project case operation:
This case is about connecting the data of Danfoss inverter to Siemens 1200PLC through Netess' Modbus to Profinet gateway device. The devices used are a Siemens 1200PLC, a Modbus to Profinet gateway, and a Danfoss inverter.
Modbus to Profinet gateway configuration method:
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About the Standard Writing of Siemens PLC Program
1. Unified program structure
OB1: main program;
OB100: Initialization program (no need to call the main program);
OB35: 100ms (modifiable) interrupt (no need to call the main program), can call the PID module;
OB80, OB82, OB85, OB86, OB87, OB121, OB122: fault diagnosis module (no need to call the
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How to connect pt100 temperature sensor to plc (principle of PT100)
Resistive temperature sensors, or RTDs, are a class of sensors whose resistance changes when the temperature of the medium they are inserted into changes.
This change in resistance is proportional to temperature and varies in a somewhat linear fashion with temperature.
This means that as the te
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Siemens develops new electric vehicle charging device that can "simultaneously charge" while driving
Beijing time, May 10th, according to German media reports, Siemens has developed a technology in Germany to charge electric vehicles through overhead suspended cables, which can realize "synchronous charging" and "contactless wireless charging" of electric vehicles while driving. Siemens has reportedly tested the t
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Siemens PLC Programming Technology and Application Cases (Edited by Liu Zhenquan, Wang Hanzhi, Yang Kun, etc.)
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