Modbus Byte order for PM2100 Series Meter Forum Home › Forums › Communicating with Devices › Modbus › Modbus Byte order for PM2100 Series Meter Tagged: manjey73 This topic contains 4 replies, has 3 voices, and was last updated by Mikhail 1 year, 9 months ago. Viewing 5 posts - 1 through 5 (of 5 total) Author Posts May 8, 2018 at 5:50 am #3678 dineshkumargowdParticipant Dear Sir, I am trying to read holding register from Schneider Easylogic PM2100 series power meter, but unable to read it. I am getting following errors 1. Device 102 “11KV Swst” : error 2018-05-08 09:48:03 Communication session with the Device 102 “11KV Swst”, type: KpModbus, address: 10 Request element group “Voltage group” Send (8): 0A 03 0B CA 00 02 E7 6A Receive (5/5): 0A 83 03 70 F3 Device error:  ILLEGAL DATA VALUE! I have tried with multiple byte order like ab cd, dc ba, ba dc, cd ab but in every sequency same errors were occurring. Kindly do needful ASAP May 8, 2018 at 7:00 am #3679 manjey73Participant A link to the list of registers PM2100. Perhaps when prompted in RapidScada need to specify the address of the register + 1 May 8, 2018 at 7:09 am #3680 manjey73Participant https://www.schneider-electric.ru/ru/faqs/FA334611/ Read the document carefully. The voltage starts from the register 3020, it may be necessary to add to the registers +1, that is, to start with 3021 Since there is no register between 3018 and 3020, you get an error from the device This reply was modified 1 year, 9 months ago by manjey73. May 8, 2018 at 7:48 am #3682 dineshkumargowdParticipant Dear Manjey73, Yes i have started the addres from 3020 to 3021 and it worked. thanks for your valuable reply. May 8, 2018 at 2:38 pm #3684 MikhailModerator Perhaps when prompted in RapidScada need to specify the address of the register + 1 In addition, you can choose addressing (zero based or 1 based) in the template settings. Author Posts Viewing 5 posts - 1 through 5 (of 5 total) You must be logged in to reply to this topic.