Technological modem “Mercury 223” is used for network addresses programming of subscriber devices (energy meters with built-in PLC-modems.
Technological modem “Mercury 223” (further TM) is used for network addresses programming of subscriber devices (energy meters with built-in PLC-modems series “Mercury”), intended for application as a part of automated data registration on power line “Меркурий-PLC”. For communication with outer world ТМ has two interfaces: technological PLC interface, used in meters programming process (on housing upper case socket) and computer USN 1.1. TM circuit diagram is given below. Together with TM the program “TMcomm.exe” is used.
During connection of TM to PC, virtual COM-port appears as PC device, through which programming process is further controlled by application software. For data exchange TM uses so called “technological” communication mode with subscriber device. In this mode data is transmitted to both directions with “fast” (100 bit/s) relative phase manipulation with frequency 20Hz and lowered in 10 times signal levels. Controlling packets format is described in document Sub_devs_interface.zip (Subscriber devices interface). Attention! Socket on TM upper case is intended only for connection and programming “Mercury” series meters. Usage with other purposes may cause breaking of device!