Estop; Communication Hardware (Rs-232 Configuration) - GE T2100-ST1 Service Manual

board. The micro controller will interpret this data in order to
enable the elevation subsystem by asserting EN_ELEV signal on
J11 and, based on the actual elevation status, assert/deassert
the UP/DOWN signal on J11 until the requested elevation is
achieved. The elevation range is from 0 to 25% grade.
The elevation position is constantly monitored by counting and
recording changes in the state of the elevation micro switch
sensor. Each debounced state is counted as positive if the
elevation motor is engaged in the up direction and negative if it
is engaged in the down direction. Using this count and the
calibration numbers, the elevation position is controlled by
turning on the motor in the desired direction and counting until
the target number of counts has been reached. At that time, the
elevation motor is disengaged until another set point position is
requested.

ESTOP

The emergency stop switch will remove power from the treadmill
control board to guarantee a stop condition. When this occurs
and the emergency stop button is subsequently released, the
control will be in the same state as when the unit is powered up
using the main power switch. Therefore, it is necessary in either
power up state to guard against inadvertent restarts if the host
doesn't recognize the situation and is continuously sending out
belt start commands. The method used to guard against this
situation is to reject any start command received within 3
seconds of powering up and finding the zero elevation position. If
a start command is rejected, all further start commands will also
be rejected until the unit is reset or a stop command is received
or communication ceases for 20 seconds.

Communication Hardware (RS-232 Configuration)

• DB9 Connector 9 pin PC/AT Style
• RS232 (+/- 10V)
• 9600 Baud
• No Parity
• 8 Data Bits
• 1 Stop Bit
• Full Duplex
2097937-002 Rev G
11 March 2019
Pin Description
2 Transmit Data
3 Receive Data
5 Signal Ground
T2100-ST1 Treadmill, 110V / T2100-ST2 Treadmill, 220V
Theory of Operation
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