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Whenever you connect with ModSoft to a com port, you have a number of protocol options including "Modbus II".
A while ago I was verbally told by someone at Schneider that this was a derivative of Modbus-Plus designed to be tunneled across a serial link. It looked like Modbus/RTU with RTU CRC, but instead of the 1-byte Slave address of RTU it had the 5-byte path of ModbusPlus. This allowed the MB+ message to bridge thru serial links without loss of the path.
I'm curious if anyone out there has ever seen a formal definition of this "Modbus II" & can confirm this?
Thanks
Lynn August Linse, Senior Product Application Engineer
15353 Barranca Parkway, Lantronix Inc, Irvine CA 92618
[email protected] www.lantronix.com
Tel: (949)300-6337 Fax: (949)453-7132
A while ago I was verbally told by someone at Schneider that this was a derivative of Modbus-Plus designed to be tunneled across a serial link. It looked like Modbus/RTU with RTU CRC, but instead of the 1-byte Slave address of RTU it had the 5-byte path of ModbusPlus. This allowed the MB+ message to bridge thru serial links without loss of the path.
I'm curious if anyone out there has ever seen a formal definition of this "Modbus II" & can confirm this?
Thanks
Lynn August Linse, Senior Product Application Engineer
15353 Barranca Parkway, Lantronix Inc, Irvine CA 92618
[email protected] www.lantronix.com
Tel: (949)300-6337 Fax: (949)453-7132