Teledyne 651 operation manual Terminal Communications, Communications Parameters

Teledyne API Ultrafine Particle Monitor - Model 651 Computer Interface, Commands, and Data Collection

Table 8-1

Signal Connections for RS-232 Configurations

Pin Number	RS-232 Signal
2	RXD (Input to Model 651)
3	TXD (Output from Model 651)
5	GND

An external computer can be connected to the Serial or USB ports for basic instrument communications.

Communications Parameters

All serial communications with the Model 651 are accomplished using the following communications parameters:

∙Baud Rate: 115,200

∙Bits/Character: 8

∙Stop bits: 1

∙Parity: None

All data communications are performed through ASCII-based character codes.

All multi-field responses are comma separated values (CSV).

All input commands and output responses are terminated with a carriage return.

All input line feeds are ignored.

Terminal Communications

When you have made a Serial or USB connection between the Model 651 and host computer, you can use a terminal emulation program to communicate with the Model 651. You can choose from the following terminal emulation programs:

∙Tera Term—a free terminal emulator for Microsoft Windows® operating systems.

∙HyperTerminal—included with most Microsoft Windows® operating systems.

You should set up the terminal emulation software so that incoming carriage returns are translated into carriage return line feed sequences and therefore do not overwrite the previous line of data. Also, consider enabling local echoing of characters so that data typed on the keyboard is displayed on the screen.

When the terminal emulation software is connected and running, if you press the Enter key you will see an ERROR response from the

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