Technogym RUN 600 XTPRO, Service Maintenance Manual

Page: 31 / 158

RUN 600 XTPRO: Service & Maintenance Manual - rev. 1.3
Page 3.7
The speed control utilizes the following signals:
•
Start signal
This is the signal generated by the CPU (pin 7-3 of connector CN1) to enable starting of the
motor. When the tread belt is stopped this signal is at logic level low (0 Vdc), whereas
immediately after the “Start” button on the display is pressed it goes high (4.8 Vdc).
The signal enters the inverter interface board (pin 8-3 of connector CN2), is processed and sent
out (pin 2-1 of connector CN1) to the inverter. In the belt-stopped condition it is -25.3 Vdc,
while immediately after pressing the “Start” button on the display it is -2.7 Vdc.
•
Speed reference signal
This is the signal generated by the CPU (pins 6-3 of connector CN1) to control the motor speed.
It is a PWM signal, that is to say a fixed frequency square wave with a variable duty cycle. The
logic of this control has the duty cycle decreasing with increasing speed. The measurement of its
DC component with a multimeter shows a value that decreases with increasing speed, from a
maximum of approximately 5 Vdc down to a few hundred mVdc.
This signal enters the inverter interface board (pins 10-3 of connector CN2), is converted into a
variable analogue signal between 0 and 10 Vdc and sent out (pins 5-6 of connector CN1) to the
inverter. The signal input to the inverter increases with increasing speed.
CPU board
8-3
Inverter interface
board
Inverter
Alarm
Alarm
Start
Start PWM
Vref
6-3 7-3 CN1
10-3 8-3 9-3 CN2
5-6 2-1 3-4
O-L 1-P24 AL1-AL0
CN1
U-V-W
M
Thermal
protection
P24-3
VAC
Variable frequency