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The VEICHI AC300 PROFINET expansion card, AC300PN1, is designed to facilitate communication between VEICHI AC300 series frequency inverters (AC300 and AC310 models) and a PROFINET master station. The card itself is composed of two interconnected boards, AC300PN_CJ and AC300PN_CN, which communicate via a dedicated line. This design allows for robust and reliable integration into PROFINET-based control systems.
The primary function of the AC300PN1 card is to enable PROFINET communication for the AC300 series inverters. This involves transmitting control commands and frequency settings from the master station to the inverter, as well as providing operational status and frequency feedback from the inverter back to the master station. The card supports various PROFINET communication modes, including string and star connections, and can be integrated into complex network topologies through the use of network switches.
The communication configuration is highly flexible, allowing users to select different PZD (Process Data) lengths for data transmission based on specific application requirements. PZD is the core process data exchanged between the master station and the slave station (the AC300PN1 card). The master station periodically sends instructions to the frequency inverter and reads its current status. PZD1 and PZD2 are fixed configurations, handling inverter control commands and frequency settings from the master to the slave, and inverter status and frequency feedback from the slave to the master, respectively. PZD3 through PZD12 are configurable, allowing users to select specific control parameters (using 0x3xxx group addresses) for periodic instructions to the inverter, and monitoring parameters (using C00.xx group and part of 0x300 group addresses) for periodic data reading from the inverter. A value of 0xFFFF indicates an invalid parameter selection for these configurable PZDs.
The card also provides a comprehensive set of indicator lights to display its communication status. These indicators offer immediate visual feedback on various operational aspects, such as power supply status, inverter fault conditions, communication health between the expansion card and the inverter, and the status of the RJ45 port and network connection.
Integrating the AC300PN1 card into a PROFINET system involves several configuration steps. First, the relevant function codes on the AC300 series frequency inverter must be set to enable normal communication with the AC300PN1 card. These settings determine how the inverter receives run commands, frequency commands, upper limit frequency selections, and torque commands, ensuring that the PROFINET card is recognized as the control source. For example, specific function codes like F00.02 (Run command selection) and F00.03 (Frequency given source channel) need to be configured to accept commands from the "Purchase card" (which refers to the AC300PN1). Similarly, F00.10 (Upper limit frequency source selection) and F07.01 (Torque command setting) may also need to be adjusted.
The PROFINET master station (e.g., an S7-1200 PLC) requires configuration using software like TIA Portal. This involves building a new project, adding the S7-1200 master station, and then importing the GSDML (General Station Description Markup Language) file for the AC300PN1 card. The GSDML file provides the necessary device description for the master station to recognize and communicate with the AC300PN1. Once imported, the slave information needs to be configured, including setting the IP address and PROFINET device name for the AC300PN1 card. The system allows for automatic generation of PROFINET device names, or users can manually assign them.
A crucial step in the configuration is selecting the interactive data station, which involves defining the PZD length based on the number of parameters to be exchanged. The "device view" in the configuration software allows users to expand the "module" and select standard telegrams (e.g., PZD-2/2, PZD-4/4, up to PZD-12/12) that correspond to the desired data exchange volume. After selecting the telegram, users can further configure the specific parameters mapped to the configurable PZDs (PZD3-PZD12), linking them to inverter control parameters or monitoring values.
Finally, the configuration is downloaded to the PLC. This involves saving the configuration, ensuring the computer and PLC are in the same network segment, compiling the project, and then initiating the download. After the download, the device name must be assigned to the slave station, binding the PROFINET device name to its MAC address. This ensures that the master station correctly identifies and communicates with each slave station in the network.
The AC300PN1 card is designed with features that simplify maintenance, particularly in the event of a card failure. Direct replacement is possible under specific conditions, eliminating the need for a complete reconfiguration of the equipment. These conditions include:
For S7-1200 or S7-1500 PLCs, checking the "allow to cover all assigned IO device names" option can further simplify the process, effectively bypassing the first condition for direct replacement. This means that if a card fails, a new, unassigned card can be swapped in, and with the correct PLC settings, it will automatically adopt the configuration of the failed card without requiring manual device name assignment or extensive reconfiguration.
The process for direct replacement involves selecting the PROFINET interface of the master station in the hardware configuration, navigating to "advanced options" in its properties, and ensuring "support equipment replacement without replaceable media" is checked. Additionally, the topology view in the configuration software must accurately reflect the physical network wiring, dragging the PLC port to the corresponding port of the AC300PN1 card (P1 on the right, P2 on the left, facing the RJ45 interface). After confirming these settings and connections, the project is compiled and downloaded to the PLC, allowing the new card to seamlessly integrate into the existing system.
For optimal performance and reliability, it is recommended to use super-5m or above shielded network cables for communication to enhance anti-interference capabilities. The communication network lines between two cards should not exceed 100 meters. For longer distances, using a switching unit network (star connection) is advised to mitigate signal attenuation and maintain anti-interference performance. Furthermore, to ensure signal accuracy and reliability, it is crucial to avoid running communication cables parallel to power lines (R/S/T, U/V/W) as much as possible, maintaining a distance of at least 0.5m if parallel routing is unavoidable. Proper grounding of the shielded network cable port is also essential to effectively reduce interference.
General| Frequency Range | 0.1Hz-50kHz |
|---|---|
| Communication | Modbus RTU |
| Digital Outputs | 2 |
| Analog Outputs | 1 |
| Protection Features | Overvoltage, Overcurrent, Short Circuit, Overheating |
| Operating Temperature | -10°C to 50°C |
| Storage Temperature | -20℃~+60℃ |
| Humidity | 5%~95% RH, non-condensing |
