Welch Allyn SureTemp PlusModule - User Manual - Manual (Page 30)

Introduction SureTemp Plus Module OEM Implementation
30 Confidential Welch Allyn OEM Technologies
8 - Communications Protocol
Introduction
The SureTemp Plus module is a command-driven slave device communicating with a host
system over an asynchronous serial communication line. The host initiates communications by
sending a command block; the SureTemp Plus module always responds with a response block.
The SureTemp Plus module and the host system are referred to below as “module” and “host”
respectively.
The protocol description includes three main sections:
Communications Interface
9600 baud rate
8 data bits, no parity, 1 stop bit
full duplex
Asynchronous using standard non-return to zero (NRZ) format
Non-isolated module power and communications are provided at J1
System EEPROM
The system EEPROM contains system configuration and operational constants that are encoded
by Welch Allyn. While the majority of parameters pertain to Welch Allyn manufacturing and
operational defaults, the OEM can customize some parameters, such as the following, to
accommodate requirements:
Packet Structure describes the protocol
Commands and Responses describes the commands
Command and Response Examples provides examples
Thermometer Algorithm The algorithm—oral or axillary—used when the oral probe is
installed. (Default: Oral)
Temperature Method Predictive or monitor mode. (Default: Predictive)