Technogym Run MED - The Reset Procedure; The Signals Involved

RUN MED: Service & Maintenance Manual - rev. 1.0
• an encoder consisting of a Hall effect sensor integrated into the elevation motor: when the
motor is running it outputs train of pulses which represent the motor movement. The AT driver
counts the pulses received and is thus able to determine the exact position of the incline. When
the target position is reached, it disables the elevation motor movement.
If, during the elevation motor operation, the AT drives detects problems on these signals and in
particular:
• if no pulses arrive to the AT driver for a time period of approximately 100 msec;
• if the limit switch outputs an open contact and it doesn’t change if the elevation is moved
upward more than 2%.
Then:
• the AT driver locks out with error code “EdC”;
• the machine displays the error message “GRADIENT NOT WORKING” and halts all
movements of both the elevation and tread belt motors;
• The parameter Par 07 is set to 1 to disable the usage of the elevation motor.
If an exercise is started, the machine will resume operation with only the tread belt motor enabled.
Only if the machine is turned off and on again, it will reset the Par 07 to 0 and will restart using the
elevation motor too.
3.3.3. THE RESET PROCEDURE
On power-up, the machine performs a reset procedure in order to determine the zero-reference
position for the incline. The procedure consists of the downward movement of the machine until the
limit switch is tripped. This defines the reference “zero position” for the incline: all movements for
reaching different elevations will be variations relative to this reference.
3.3.4. THE SIGNALS INVOLVED
The machine uses the following control signals:
• RS-485 Signal
This is a digital signal exchanged between the AT board and the display board.
• Motor voltage signal (Vdc)
This is the DC voltage generated by the AT driver (pins 2-1 of connector J7) for supplying the
elevation motor. Its absolute value is 24 Vdc and, depending on its polarity, it causes the motor
to rotate in either a clockwise or anticlockwise direction. The incline of the machine will
increase or decrease accordingly.
• Pulse signal
This is a square wave signal with frequency 50 Hz (T=20 msec) and 50% duty cycle generated
by the Hall sensor when the elevation motor moves. This signal enters the AT driver (pins 6-4
of connector J7) and provides the feedback of the motor movement.
Page 3.9