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The panel consists of basic ingredients: a Be1 generator controller, a general-purpose interface relay board, a state-of-art GSM Be148-1 gateway and a multiband MODEM. If there is no GSM field, you can optionally place the GSM gateway as far as 1000 meters. A reasonable distance will be 10 meters. If distance between router and master inverter 80m, then use extender or repeater. A CAT6 cable can theoretically carry data for 100m but after 80m, there would be signal attenuation and it would be impractical. Now there was certain instances I used STP wire for rs485 because I had a lot of devices connected in a long run chain (DMX512 lighting fixtures). Differences between Modbus and JBUS at that time (number of entities, server stations) are now irrelevant as this protocol almost disappeared with the April PLC series, which AEG Schneider Automation bought in 1994 and then made obsolete. The green indicator ‘Act’ will blink from time to time. The green indicators ‘Power’ and ‘Online’ will turn on. You can observe the modem status by looking at its three LED indicators.

Loose the two screws on the left side in a way that the door of the panel can pivot toward the left side. I’m wanting to use the photon/electron for an rs485 cable replacement between two pieces of equipment, no computer on either end. If you are planning to replace the cable between two existing RS485 nodes, you need a way to talk to the nodes on either side, and that would still be RS485. RS485 isn’t really a protocol but the definition of the electrical characteristics of the link between nodes. Modicon Modbus Protocol Reference Guide - Modbus Organization (1996). This is an obsolete Modbus specification, should only be used to address legacy issues. Enron Modbus - another extension of standard Modbus developed by Enron with support for 32-bit integer and floating-point variables, and historical and flow data. No standard way exists for a node to find the description of a data object, for example, to learn that a register value represents a temperature between 30 and 175 degrees.

The historical data serves to meet an American Petroleum Institute (API) industry standard for how data should be stored. Modbus is restricted to addressing 247 devices on one data link, which limits the number of field devices that may be connected to a parent station (again, rs485 cable Ethernet TCP/IP is an exception). Be1 does not have at least one active alarm. It sends a request to get information about active alarms. It sends a request to read the voltage and frequency of the generator. It sends a request to enter the AUTO mode of operation. It makes starting the engine (only if Be1 is in AUTO mode of operation). Be1 can periodically automatically start the engine based on your settings. You can connect here, in logic 'OR' fashion, start requests coming from the pressure switch, level switch, and a relay suitable for your application. MODBUS Application Protocol 2012, p. I’ll see if I can find more information on the protocol. You need to find some datasheets/appliction notes to get that info too before being able to make a educated choice. I guess if nothing else, I could use trial and error to find which one works; while not ideal, it may be my only option.

We need to test the operation of a computer Belden cable RS485 for one of our clients. This command works if the Be1 controller is in AUTO mode of operation (it does not work in MANUAL mode). After you start the engine using an SMS, this command stops the engine. When the Be1 receives or sends an SMS, the SEND RECEIVE turns on for a second. When the Be1-GSM panel detects a valid SMS, the yellow indicator SEND RECEIVE turns on for a second. The main output of the Be1-GSM panel is the FUEL SOLENOID. Be1 features adjustable settings for pre-glow and gas-purge solenoid. Connect your generator as indicated in the Be1 recommended wiring diagram section 17 of the Be1 installation manual. Carry out a full generator or engine test without GSM. In this case, you stop the engine and instruct the Be1 controller to enter the OFF mode. From the computer to the controller, there are multiple options, and since the controller is usually within sight of the computer, there is no need to reinvent the wheel, so to speak, on that. But You stated you are going to install this at a commercial setting, so it always better to use the worst case environment situations, and use shielded cable.