I have SL7000 meter and GSM Modem iRZ. When i send by using RS-485 cable - everything work. But when i'm trying to use GSM modem i'm getting issues. When i send SNRM like this: 7E A0 0A 00 22 00 51 03 93 6A 34 7E I get normal UA. But when i try to send SNRM like this: 7E A0 21 00 22 00 51 03 93 6B 21 81 80 12 05 01 80 07 04 00 00 00 02 08 04 00 00 00 01 3D 93 7E (It's from DXDLMSDirector) I get nothing. Absolutely! Maybe there is some trick to use hdlc with gsm modem? Maybe special delays or something?
Problem with sending HDLC frames by using GSM modem
110 Views Asked by Димон ИМХО At
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If both of these frames work via the RS-485, and not via the GSM, then there are a couple of possible answers: 1) the addressing you are using is not permitted if this is a seperate port 2) if it is the same port on the meter, then the GSM Modem is not directing traffic to the same RS485 address