The TF1100 has communication protocol. Its hardware directly supports a modem, a composition of flow data monitoring system that is economical, reliable and based on telephone line transmission. It can also be connected to a RS-485 or RS232C connectors based on jumpers on circuit board for user’s option. Two basic schemes can be chosen for networking, i.e. the analog current output method only using the TF1100 or the RS232 communication method via serial port directly using the TF1100. The former is suitable to replace dated instruments in old monitoring networks.The later is used in new monitoring network systems. It has advantages such as low hardware investment and reliable system operation. When the serial port communication method is directly used to implement a monitoring network system, the address identification code (in window M46) of the flowmeter is used as network address code. Expanded command set with [W]is used as communication protocol. Thus analog current loop and OCT output of TF1100 can be used to control the opening of a control valve. The relay output can be used to power-on/off other equipment. The analog input of the system can be used to input signals such as temperature. The system provides an RTU function for flow measurement. RS-232C (0~15m) or RS-485(0~1000m) can be directly used for data transmission link for a short distance. Current loop, radio transmission and modem can be used in medium or long distance transmission. When the TF1100 is used in a network environment, various operations can be performed at the host device, except for programming of the address identification code, which needs to be done at the TF1100 keyboard.
The command answer mode is used in data transmission, i.e. the host device issues commands and the flowmeter answers correspondingly. Common/special flow/thermal data monitoring system developed by our company can be used for flow data collection. Based on characteristics of the TF1100 flowmeter, the system makes full use of software and hardware designs with flowmeter features. The systems are simple, clear, low cost, and reliable in operation.
Post time: Nov-13-2022