serial terminal
5.A dual serialport singlechip with dual serial port is used as the main control chip on front terminal to collect the signals of elevator status,fault and field equipments, meanwhile communicates with the singlechip MODEM on front terminal in serial mode.It makes the front terminal communicate with the server through public telephone network,thus the functions of faults remote alarming,running status recording and server active calling is accomplished well.
7.On hardware design, we adopted chip TC45, the GPRS communication module which assembling JVM, ROM and ROM, as the control chip of mainframe. By analysis the chip structure and system design request, we accomplished design of external source, startup reset, SIM card, Pulse, Serial Port and signal bulb circuit of terminal.
