Both boards support the Modbus protocol and Laurel’s Custom ASCII protocol, as well as half-duplex or full-duplex RS485 communications. See page 7 of the Laurel digital panel meter manual, page 7 of the Laurel counter manual, page 8 of the Laurel scale meter manual, or page 8 of the Custom ASCII protocol manual. To set up communications for your meter or counter, see the Serial Communications section of its user manual. Confirm serial port parameters such as baud rate, data bits, and stop bits: Baud rate should be configured according to the connected RS485 device, commonly used rates are 9600 and 115200; Refer to the device manual or contact RS485 device technical support for configuration, especially if set to Modbus mode, confirm if the function code matches. Read rates vary with counters, since they are normally controlled by the user entry Gate Time. Reliable Supports high data transfer rates without affecting PC performance.
This ensures that all security-related information and incidents are transmitted quickly and with high reliability. User connections are an RJ11/12 telephone style for the RS232, a 3 pin removable screw terminal strip for the RS485 port, and a 2.1 mm barrel connector, or a 3 pin screw terminal strip for the power. As a result, it has become challenging for the computers to take up as little room as possible, while maintaining power comparable or even sometimes offering greater functionality than their counterparts. A challenge is that Laureate meters use RJ11 jacks, while Laureate LT series transmitters use screw-clamp connectors for three discrete wires. RS485 is specified for multi-point communicates where multiples devices have their own address on the same communication line, while RS232 is only specified for point-to-point communications. In short, RS485 is a standard defining the electrical characteristics of serial lines for use in serial communications systems. RS485 is also used in performance venues to control lights and systems such as the one shown below.
RS485 main advantages as compared to other serial communication are tolerance to electrical noise, lengthy cable runs, multiple slaves in one connection, and fast data transmission speed. The cable shield must be earthed only in one point. The visualizer has two windows, one of which displays data sent to the Serial device, and another one displays data received from the Serial device.All subsequent packets are concatenated into a single data stream, which is displayed as sequence of hexadecimal, decimal, octal, binary data and text. Product offers a generic serial data/requests filtering feature, which allows you to configure filtering for different visualizers, create filtering schemes and quickly apply them to different visualizer windows.Additionally, you may change the appearance of visual elements for monitored packets in the data visualizers including MODBUS View, Request View (Serial, Bridge), Data View, PPP View. The search may be performed among the whole visualizer contents or among the selected area only.Some visualizers also provide advanced searching capabilities, including searching for text in different encodings or binary data and a search with regular expressions. In Complete mode the entire packet is decoded and all accompanying data is provided in Hex/ASCII view.The contents of the visualizer can be copied into the Clipboard or exported into the file in various formats.
Second part displays raw packet contents. The data rates, often termed baud, of RS-485 can vary from a rapid 10 Mbps (megabits per second) to a sluggish 9.6 kbps (kilobits per second). Under some conditions it can be used up to data transmission speeds of 64 Mbit/s. Most Modbus implementations use RS485 due to the allowance of longer distances, higher speeds and multiple devices on a single network. Termination resistors also reduce electrical noise sensitivity due to the lower impedance. Star and ring topologies are not recommended because of signal reflections or excessively low or high termination impedance. This provides high noise immunity and allows distances up to 4,000 ft (1200 meters). Cable jacket: Made from high-quality PVC, the outermost jacket layer has high elasticity, helping to protect the cable from strong environmental impacts. 1. Connect the RS485 and your PC/Laptop through a LAN cable. A Modbus RS485 connects a Master device to one or more Slave devices. This converter converts a USB port to not only RS485 but also RS232 and TTL, making it more versatile. Use a 485 to USB serial cable, connect it to the interface of the 485 device and the computer's USB port, assign a COM port on the computer, open serial debugging assistant software, set the serial port parameters consistently, input the corresponding COM port, and monitor the data from the 485 device.
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