Model 115-Compatible Communications Protocols; 115 Update Mode - GE Corometrics 126 Service Manual

Model 115-Compatible Communications Protocols

115 Update Mode

Revision B
Peripheral Devices: Model 115-Compatible Communications Protocols
Two options provide backward-compatibility so that the 120 Series Monitor can
operate in a Model 115-compatible communication mode.
115 Update Mode: The 115 Update mode outputs all available information and
ignores requests from a host computer system.
115 Transmit/Receive: The 115 Transmit/Receive mode only outputs data
requested from a host computer system.
When the Model 115 Fetal Monitor was released, many customers developed their
own interfaces for communicating with the monitor. Setting the 120 Series Monitor
to one of these communication modes allows these users to use their existing
interfaces with the 120 Series Monitor as well.
The 120 Series Monitor emulates the Corometrics Model 830 Converter's
implementation of the 115 Communication Protocols. This protocol is named after
the Corometrics Model 115 Fetal Monitor in which it originated.
NOTE: The baud rate must match the external computer; however, the
recommended baud rate is 9600. Lower baud rates may result in some data
loss.
IMPORTANT
FETAL VS. MATERNAL—This is a "fetal" protocol, not a
"maternal/fetal" protocol. This protocol will output HR1, HR2,
UA, modes, and message annotations (including maternal vital
signs). This protocol will not send three heart rates, waveforms,
or HRC.
All information is transmitted from the 120 Series Monitor as soon as the
information becomes available.
IMPORTANT
DATA REQUESTS—When set to the 115 Update Mode, the 120
Series Monitor will not respond to any requests for information
sent from an external (host) computer.
Heart rate data is transmitted on a quarter second basis. Uterine activity is
transmitted eight times per second. Modes are transmitted once per minute, and
whenever a mode change occurs. Model 2115/2116 messages are sent as they are
received. Event marks are transmitted each time the
Fetal movement data is transmitted four times per second. Recorder status (PAPER
OUT) information is transmitted once per second, when active, until the condition is
resolved.
120 Series Maternal/Fetal Monitor
2015590-001
pushbutton is pressed.
Mark
11-9