Product Introduction

8043-A1660-L1-13 Performance 107: When using CP340, CP341 to communicate with third-party products (such as PC, using VB, VC to read data), how to identify whether the connection is good? . Internet technology makes it possible to remotely operate and monitor the factory at any location. Bidirectional connection: connection between two CPUs: each CPU can send and receive a GD data packet. The technical parameters of the SM321-1CH20 and SM321-1CH80 modules are the same. The only difference is that SM321-1CH80 can be applied to a wider range of environmental conditions. Therefore, you do not need to change the hardware configuration. 45: If the CPU is cut off, does the 2-wire measuring transmitter continue to be powered? Application of modules with compact structure and space saving

Currently, there are many types of PLCs, but their basic structure and principles are the same, and their basic functions, instruction systems and programming methods are similar. Therefore, this teaching plan starts from practical application and selects the Siemens S7 300 series high-performance, small and medium-sized modular programmable controllers with the most characteristics and IEC standards as the background model.

S7-300/400 is a modular PLC, mainly composed of a rack, CPU module, signal module, function module, interface module, communication processor, power module and programming device.

1. S7 series: PLC products in the traditional sense, S7-200 is a small PLC for low performance requirements. S7-300 is a modular small and medium-sized PLC, which can be expanded to 32 modules at most. S7-400 is a large PLC that can be expanded to more than 300 modules. S7-300/400 can form MPI, PROFIBUS and Industrial Ethernet, etc.

2. M7-300/400: Using the same structure as S7-300/400, it can be used as a CPU or a function module. It has the functions of an AT-compatible computer and can be programmed in languages ​​such as C, C++ or CFC.

3. C7 consists of S7-300 PLC, HMI (human-machine interface) operator panel, I/O, communication and process monitoring system.

4. WinAC is based on Windows and standard interfaces (ActiveX, OPC) to provide software PLC or slot PLC

How does STEP 7 store POINTER parameter types in format?

STEP 7 saves POINTER parameters in 6 bytes. Table 4-1 shows the memory area used to save POINTER parameter types and the data saved in each byte. The POINTER parameter type saves the following information: DB number (0 if no data is saved in the DB). Memory area in the CPU (the table lists the hexadecimal codes for the various memory areas).

Address of the data (in Byte.Bit format). 

If you declare a formal parameter as a POINTER parameter type, only the memory area and the address are required. STEP 7 automatically converts the format of the input item to the pointer format.

What do the return values ​​of the function blocks DP_SEND and DP_RECV mean and how do you understand them?

The "DP_SEND" function block includes three parameters: "DONE", "ERROR" and "STATUS", which are used to indicate the status and success of data transmission. The "DP_RECV" function block includes four parameters: "NDR", "ERROR", "STATUS" and "DPSTATUS", which are used to indicate the status and success of data transmission. You can define the corresponding data address area to store these return values ​​and analyze the meaning of the returned values. When Error = False, STATUS = 0, DONE=True, and NDR = True, it means that the data exchange between the CPU and the CP342-5 is successful.

C98043-A1660-L1-13 Performance Possible reasons: module damage, power failure, or fault detection. Each rack cannot have more than 8 signal modules (SM, FM, CP), which are located to the right of the interface module. 40: Can SM321-1CH20 be used instead of SM321-1CH80 without changing the hardware configuration? 1) FM357-2 failed to start. But it is these differences that determine the selection of CPU in specific applications.

C98043-A1660-L1-13 Performance User Manual

Notes on multi-CPU environment in Siemens S7-400 plc

Running on sub-rack UR1 or UR2 with shared K bus and P bus without segmentation

? All CPU operating states (CPU operating system performance) operating on a common peripheral bus (P) and communication (K) bus will be automatically synchronized.
? A complex large task can be split into up to 4 CPUs for calculation.
? It is possible to achieve proportional performance upgrades by simply inserting CPUs.
? Increase system resources ( Memory, standard area, counters ...). However, the number of input/output points will not increase.
? It is possible to separate time-critical and non-time-critical process areas (i.e., fast control of a fast closed-loop controller).
? Multiple CPUs can share a CP template and external communication. I/O templates can only have one CPU. If one of them stops, the other CPUs will also stop.
? The following order numbers of S7-CPU support multi-CPU operation mode:
6ES7412-1XF01-0AB0
6ES7413-1XG01-0AB0
6ES7413-2XG01-0AB0
6ES7414-1XG01-0AB0
6ES7414-2XG01-0AB0
6ES7414-2XJ00-0AB0 Version 3

6ES7416-1XJ01-0AB0

6ES7416-2XK00-0AB0 Version 3 and above

6ES7416-2XL00-0AB0 Version 3 and above

? The M7-CPU 486-3 Pentium 75 MHz (formerly: CPU 488-4) and 488-3 Pentium 120 MHz (formerly: CPU 488-5) do not currently support multi-CPU operation.

Operation on segmented subrack CR2

? The segmented subrack contains two independent P-buses, 10 slots in segment 1 and 8 slots in segment 2.

? Each peripheral bus segment uses a CPU, and the I/O modules are assigned to the local CPU. The CPUs run independently, without synchronization of operating states.

? The common communication bus allows communication between subunits without the need for additional hardware.

? Thus, 2 separate controllers can be configured in one CR. This saves space in the cabinet.
? Cost savings, since only one subrack and one power supply unit are required.
? Both S7-400 and M7-400 CPUs can be used without any restrictions, i.e. even S7 and M7 CPUs can be placed together in a CR2. (Warning: To run an M7-CPU 486-3 together with a 488-3 in a CR2, only M7-SYS V2.0 and STEP7 basic software V3.1 are available. The original CPUs 488-4 and 488-5 cannot be run in a CR2).

C98043-A1660-L1-13 Performance 6ES7323-1BL00-0AA0 SIMATICS7-300, digital module SM323, opto-isolation, 16DI and 16DO, 24VDC, 0.5A, current 4A, 40-pin 6RA8085-6FV62-0AA0 78: STEP7 stores POINTER parameter type in format? STEP7 saves POINTER parameters in 6 bytes. 2. Remove the coding pin of the front connector from the module Before starting to install a new module, the upper flat coding pin of the front connector should be removed from the module (as shown in Figure 2-12). 3. Open to *automation structure An obvious technical trend in the field of automation is that the modularity of the system has been greatly improved, that is, the automation structure composed of technical modules with intelligent functions. 30: How are variables stored in temporary local data?

Module installation steps

Insert the bus connector into the CPU and the Xinxi module, function module, communication module, and interface module.

Each module (except the CPU) has a bus connector.

When inserting the bus connector, you must start from the CPU and remove the bus connector of the next module.

Insert the bus connector into the previous module.

* The next module cannot be installed with a bus connector.

Hang all modules on the rail in the order specified by the modules. Slide the module to the left side of the module. Then install the module downward.

Use a 0.8 to 1.1mm instrument screwdriver to tighten the screws and fix all modules

Label the modules

After the modules are installed, give each module a slot number. Insert the slot number label on the corresponding module as shown in Figure 2-9. The slot number label is included in the CPU.

Why is the system always in STOP state after powering on, even if the CP342-5 switch has been turned to Run? You should check whether the STEP7 program and configuration are correct (delete the program and only download the hardware configuration), check whether the 24V power line connected to the CP342-5 is normal, whether the M terminal is short-circuited with the M terminal of the CPU, whether the communication cable is connected correctly (confirm that the communication cable is not internally short-circuited), and whether the CP firmware is correct. If you confirm that the above reasons can be eliminated, then your CP342-5 may be damaged, please replace it.

How to configure a PROFIBUS slave station with CP342-5?

1. Create a new project in STEP7 and insert an S7-300 station.

2. Select a S7300 rail and the corresponding CPU in the hardware configuration window.

3. In the Hardware Configuration window, select the CP342-5 corresponding to your order number and version number in the path "SIMATIC 300 > CP 300 > PROFIBUS > CP342-

5" and insert it into the corresponding slot of the S7300 station. Note that if you purchased Version5.1 and can only find Version5.0 in the configuration, you can use Version5.1 instead of Version5.0.

4. When inserting the CP342-5, a PROFIBUS properties window will pop up. Click the "New..." button to create a PROFIBUS network PROFIBUS(1) and set the station address of the CP342-5 as a slave to 3.

5. Double-click the CP342-5 to open the CP342-5 properties window. Select the "DP Slave" option under the "Operating Mode" tab. A warning window will pop up to inform you that if you want to use CP342-5 realizes the communication between CPU and PROFIBUS slave station. It must call FC1 (DP_SEND) and FC2 (DP_RECV) function blocks to realize the data exchange between CPU and CP342-5, while the data exchange between CP342-5 and PROFIBUS is completed automatically without programming. FC3 and FC4 are used for diagnosis and communication function control, and generally do not need to be called

C98043-A1660-L1-13 Performance initialization module: OB100, which is only called once when the system starts running, can be used to initialize certain data. 68: After the entire system is powered off, why does the CPU remain in the stopped state after the power is restored? The entire system consists of a DP master station S7-300/400 and a slave station. 3. Confirm that the power grounding complies with the technical regulations. Use a programming cable to connect the programmer and CPU. For 8-bit type modules, input and output each occupy one byte, and they have the same byte address. If fixed slot addressing is used and SM323 is inserted into slot 4, the input addresses are I4.0 to I4.7 and the output addresses are Q4.0 to Q4.7.

I think you'll find our product offers great value for money！

It's my pleasure to introduce our latest product, which will be a great addition to your current offerings！

We're thrilled to introduce you to our latest product, which we believe will meet your needs perfectly！

We believe this product can help to expand your market share. We look forward to the opportunity to work with you！

We sincerely welcome your calls and consultations and provide you with quality service 24 hours a day！

· Many products are not yet on the shelves please contact us for more products.

· If there is inconsistency between the product model and the display picture, the model shall prevail, please contact us for specific product pictures, we will arrange to take pictures in the warehouse to confirm!

.Technical Team Service Hotline：wujinghan102@gmail.com     +86 13376990653

                                                         csyili980622@gmail.com        +86 13306931261