Recent content by ptewari75

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    Connecting to Rayleigh Meter Using Modbus

    Hi, Referring to page 3 (under readable parameter table) of the attached document shows data in Input Registers with data type float (2 registers). Floating points can be read as "little endian", "little endian byte swapped", "big endian" and "big endian byte swapped" so use any of these format...
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    Modbus Write command format

    Hi As you are getting "Illegal data address" which occurs if you are reading or writing registers which are not in slave. So suggest to use address 4 for writing holding register "40005" and check. Regards,
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    ModBUS TCP/IP Issue - Multiple Connections

    Hi, As Modbus works on client/server concept so UPS modules may have limitation of only 1 client connection that is why when WebCTRL is disconnected you are able to connect. You have to check with UPS if they can allow more then 1 client connection. Regards, Prasoon Tewari
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    Profibus DP to Modbus RTU Gateway

    Hi, Thanks all for their suggestion. Regards, PT
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    Profibus DP to Modbus RTU Gateway

    Hi Max, I want to use Gateway to convert Profibus DP slave devices data into Modbus RTU. If any good gateway you know, please suggest. PT
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    Profibus DP to Modbus RTU Gateway

    Hi, We need to read data from Profibus DP. So anyone can suggest reliable gateway to convert date from Profibus DP to Modbus RTU? Regards, PT
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    Modbus TCP Communication Issue

    In Modscan tool check what is the exception code. This you can know by using the option of "Setup > Display options > Display traffic". If IP address, port and Id is correct, the you will see one grey part that is request from Modscan and another part which is received message from PLC will be...
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    Modbus TCP Communication Issue

    In Modbus TCP you require to define IP address, Port number (usually it is 502), and Slave ID. As in Modbus TCP one byte in MBAP header is used for unit identification. So test with Modscan tool.
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    Modbus Control for Digital Dial Gauge Data Logger

    As the data sheet is in Chinese but thanks to Google as language is not barrier. As per document page 7:- " Seven display box data output protocol 1. Data frame format:  MODBUS RTU mode  Communication parameters: baud rate 38400, 19200, 9600, 4800  Data frame: 1 start bit, 8 data...
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    Want to Control a Blower, But No Experience w/Modbus

    As you mentioned you want to read Modbus data of Delta VFD-L in Artisan software. I gone through Delta VFD-L User Manual document and found that Delta VFD-L supports Modbus ASCII. Please check what is there in your site. So your software should support Modbus ASCII. If not, then you have to use...
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