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Hello dear, happy to answer for you. The main product introduction of Siemens S7 series is as follows: Siemens' PLC consists of multiple series, which can meet the needs of a variety of automation control.
Among them, the most widely used is the S7 series PLC, including the small S7-200PLC, the medium and large S7-300 PLC and S7-400 PLC. This article takes S7-200PLC as an example. The SIMATIC S7 programmable controller family includes the miniature PLC (S7-200) series, the low energy series (S7-300) and the medium and high energy series (S7-400).
The SIMATIC M7M7 PLC system brings the XING capabilities of an AT-compatible machine to the PLC or, conversely, adds the functions of the PLC to the computer and maintains a familiar programming environment. The complete system of the SIMATIC C7 series consists of a PLC (S7-300), an HMI operator panel and a process monitoring system. The integration of the PLC with the operation panel can make the entire control equipment smaller and better.
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1. Siemens S7-200 series PLC indicator description.
The S7-200 series PLC indicator usually includes SF, RUN, STOP indicators and on-in and out-out indicators, the current running state of the CPU can be judged through the SF, RUN and STOP three indicators, and the status of the PLC on-in and out-out points can be judged through the on-in and out-out indicators, which are as follows:
1. SF indicator: only the PLC is lit (red) when there is a fatal error, and it is off in other cases; In the fault state, you can view the corresponding fault information and fault ** through the PLC information in the menu bar, and the detailed fault information and fault ** comparison table are attached to the PLC help file, which can be used for troubleshooting.
2. RUN indicator: light up (green) when the CPU is in the running state, and turn off when the CPU is in the stopped state;
3. STOP indicator: light up (green) when the CPU is in the stop state, and turn off when the CPU is in the running state;
4. Open in and out indicator: located on each open in and out module, according to the bit indication, the bit is lit when it is 1 (green), and it is off when the bit is 0.
2. Siemens S7-200 series PLC DIP switch description.
The S7-200 series PLC CPU module DIP switch contains three positions: Run, Temp, and Stop, which are described as follows:
1. Run: The PLC will automatically enter the running state when powered on; The PLC cannot be run (run) and stop (stop) operation in the programming software; In the running state, the DIP switch is turned to the temp position, which does not affect the operation; In the running state, the DIP switch is directly hit to the STOP position, and the PLC enters the stop state.
2. TEMP: PLC will automatically enter the running state when powered on; The PLC can be run (run) and stop (stop) operation in the programming software; In the running state, the DIP switch is turned to the run position, which does not affect the operation; When the DIP switch is turned to the STOP position in the running state, the PLC enters the stop state.
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