托管开发者只须创建一个使用首选的传输和通讯协议的应用程序来接收更新程序包。
The managed developer simply needs to create an application using their preferred transport and communication protocol to receive the update packets.
系统压力或差压变送器信号输出采用HART现场总线协议，数字信号传输通过RS485进行MODBUS通讯。
HART field-bus protocol is used in output of system pressure or differential pressure transmitter, digital signals is transmitted with MODBUS via RS485.
通过在单片机方和PC机方制定相应的通讯协议，该卡能直接用于采用计算机技术、对要求数据传输速率比较高的工业现场控制系统中。
By making relative communication protocol in the SCM and the same in the PC, the card can be directly used in an industrial field control system with highspeed data transmission.
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