Review PLC Siemens S71200 1212C

Summary

This video explains the setup and operation of the Siemens S7-1200 PLC, focusing on its digital and analog inputs and outputs. The presenter covers the use of digital signals (on/off) for detecting objects, switches, and other inputs, as well as the configuration of analog inputs for voltage measurements. Key details about wiring, power sources, and the DC-AC conversion process are highlighted. The importance of checking specifications and ensuring correct wiring for safety and proper function is emphasized. Additional modules like the SM131 are introduced to expand the PLC’s capabilities.

Takeaways

• 😀 Digital inputs in the PLC Siemens S7-1200 range from X00 to X07 and use DC 24V as the standard input voltage for the system.
• 😀 The digital output range for the Siemens S7-1200 PLC is from Y00 to Y05, and it can be configured for both AC and DC outputs depending on the setup.
• 😀 Analog inputs in the PLC system, such as AI00 and AI01, receive signals up to 10V as standard, providing flexibility for various analog sensor integrations.
• 😀 Digital outputs (DO) in the PLC are used to send signals to actuators, with six DO pins ranging from 0 to 5, enabling control of devices like motors or valves.
• 😀 The Siemens S7-1200 PLC uses additional modules like the SM131 to expand its capabilities, specifically adding more analog inputs.
• 😀 Understanding digital inputs involves recognizing that they are electronic on/off signals, used for detecting objects, switches, and buttons.
• 😀 Before using the PLC, it is essential to verify the type of current (AC or DC) and check the specifications of both the digital and analog inputs and outputs.
• 😀 Wiring and power supply installation should be done carefully, ensuring the 24V DC power supply is connected to the appropriate ports for proper operation.
• 😀 Proper inspection of cables, such as checking for damage or ensuring correct wiring between live and neutral connections, is crucial to avoid short circuits or fire hazards.
• 😀 The DC-DC relay system in the Siemens S7-1200 PLC converts AC power into DC, providing stable power to the system and supporting both input/output signals and relay operations.

Q & A

What is the function of digital inputs (X0 to X7) in the Siemens S7-1200 PLC?

The digital inputs (X0 to X7) in the Siemens S7-1200 PLC are used to receive binary signals such as detecting objects, switches, or buttons. These inputs are connected to a 24V DC power source and are crucial for interacting with various external devices.

What are the key characteristics of digital outputs (Y0 to Y5) in the Siemens S7-1200 PLC?

The digital outputs (Y0 to Y5) are used to send control signals to actuators. These outputs can handle both AC and DC power, depending on the configuration, and are used for controlling devices such as motors or relays.

How does the Siemens S7-1200 PLC handle analog inputs?

The Siemens S7-1200 PLC has built-in analog inputs that can handle signals in the range of 0-10V. Additional modules, such as the SM131 module, can be used to expand the number of analog inputs, allowing for more sensor inputs to be processed.

What is the role of the DC-DC relay in the Siemens S7-1200 PLC?

The DC-DC relay in the Siemens S7-1200 PLC is responsible for converting the incoming AC power to DC, which powers the PLC's internal circuits. It also ensures that the input and output signals operate on DC voltage for proper system functionality.

What type of power supply is required for the Siemens S7-1200 PLC?

The Siemens S7-1200 PLC requires a 24V DC power supply to operate. This power is connected to the PLC's L+ and L- terminals, providing the necessary energy for both the system and the connected input/output devices.

How should the wiring be checked before powering on the Siemens S7-1200 PLC?

Before powering on the Siemens S7-1200 PLC, the wiring should be thoroughly checked to ensure that all connections are correct and secure. This includes verifying that the cables are intact and free of damage, and ensuring that the live and neutral wires are properly separated to avoid short circuits.

What is the purpose of the SM131 module in the Siemens S7-1200 PLC system?

The SM131 module is an expansion module that adds additional analog input channels to the Siemens S7-1200 PLC. It provides 4 extra analog inputs, allowing the PLC to handle more sensors or devices that require analog signal processing.

What should be considered when choosing between AC or DC for PLC inputs and outputs?

When choosing between AC or DC for PLC inputs and outputs, it is important to consider the specifications of the devices being controlled or monitored. This includes matching the voltage type (AC or DC) with the devices' requirements and ensuring proper relay configurations to handle the power needs.

What safety precautions should be followed during the setup of the Siemens S7-1200 PLC?

During setup, safety precautions include ensuring that all wiring is correct and securely connected, checking for any potential faults in cables, and verifying that the correct voltage levels are applied. It’s also important to avoid short circuits by ensuring proper insulation and separation of live and neutral wires.

Why is it important to review the data sheet before using new PLC components?

Reviewing the data sheet before using new PLC components is essential to ensure compatibility with the physical setup and to verify the specifications, such as voltage ratings and input/output capabilities. This helps prevent installation errors and ensures that the system will operate safely and efficiently.