waterrower products

PC Cable Specification



View S4 v1 cable specifications PDF (or visit our shop to order PC Cables).

Mini Din Plug

Pin

RS232 9 pin

RS232 15 pin

1

Output

Pin 3

Pin 2

2

 

 

 

3

 

 

 

4

 

 

 

5

 Input

Pin 2

Pin 3

6

 

 

 

Scn

 

Pin 5

Pin 7

Note: this chart has been corrected 28Oct05

Series III (later model with d-connector in back of housing) (Click here for drawing)

 

Series III (early model with DIN connector on end of spigot tube) and Series II (Click here for drawing)

This document outlines the Din Plug outputs for the Series II and Series III

Din Plug End View

Series II

Din Plug

Pin

RS232 9 pin

RS232 15 pin

Pin 1

Signal Out

Pin 3

Pin 2

Pin 2

Ground

Pin 5

Pin 7

Pin 3

Signal In

Pin 2

Pin 3

Pin 4

Analogue

No Connection

No Connection

Pin 5

Ground

 

 

Series III

Din Plug

Pin

RS232 9 pin

RS232 15 pin

Pin 1

Signal Out

2

 

Pin 2

Signal In

3

 

Pin 3

DTR

4

 

Pin 4

Ground

5

 

Pin 5

Analogue

No Connection

No Connection

Series III and S4 Computer Data Format

This document outlines the format of data sent down the RS232 serial link from the WaterRower Series III computer. The data transmitted recreates the displayed parameters on a remote computer. It also provides additional information, which defines the shape of the power stroke.

Basic Protocol

Baud Rate: 1200

Number of Data Bits: 8

Number of Stop Bits: 1

Parity Check: None

Flow Control: None

Distance Message

Once every second during the workout a two byte message is sent containing the following information

Byte 0 Identification Number = FEh

Byte 1 Distance covered in last second in 0.1m units (as used by the distance display)

Note that this information will be sent at the next free sample slot and consequently transmission may be delayed by up to 125ms

Stroke Rate/Speed Message

At the start of every stroke (excluding the first stroke or a stroke >= 16 secs) during a workout a three byte message is sent containing the following information

Byte 0 Identification Number = FFh

Byte 1 Current no of Strokes per minute (equal to the displayed stroke rate)

Byte 2 Current Speed in 0.1m/s units (equal to the displayed speed)

Motor Voltage Message- Series III only

During the power stroke (i.e. when motor voltage ADC output >=16), the ADC output of the sampled motor voltage is sent in pairs by use of three byte messages containing the following information

Byte 0 Identification Number = FDh

Byte 1 ADC output of previous motor voltage sample

Byte 2 ADC output of the current motor sample

Consequently, the first message is sent in the sample after the beginning of the power stroke (i.e. 62.5 ms after the stroke rate/speed message) and then at every other sample (i.e. every 125ms) until the end of the power stroke. If the power stroke contains an odd number of samples then byte 2 of the last message will be set to 0.

End of Power Stroke Message

At the end of the power stroke (i.e. when the motor voltage ADC output falls back below the threshold level of 16), a one byte message is sent containing the following information.

Byte 0 Identification Number = FCh

If the power stoke contained an odd number of samples, then transmission will be delayed by one sample (i.e. 62.5ms).

Heart Rate Message

Whenever a Heart Rate value is received from the polar rate monitor, the following two byte message is sent.

Byte 0 Identification Number = FBh

Byte 1 Heart Rate Value (40-240)

Series II Data Format

This document outlines the format of data sent down the RS232 serial link from the WaterRower Series II computer. The data transmitted recreates the displayed parameters on a remote computer. It also provides additional information, which defines the shape of the power stroke.

Basic Protocol

Baud Rate: 1200

Number of Data Bits: 8

Number of Stop Bits: 1

Parity Check: None

Flow Control: None

Distance Message

Once every second during the workout a two byte message is sent containing the following information

Byte 0 Identification Number = FEh

Byte 1 Distance covered in last second in 0.1m units (as used by the distance display)

Note that this information will be sent at the next free sample slot and consequently transmission may be delayed by up to 125ms

Stroke Rate/Speed Message

At the start of every stroke (excluding the first stroke or a stroke >= 16 secs) during a workout a three byte message is sent containing the following information

Byte 0 Identification Number = FFh

Byte 1 Current no of Strokes per minute (equal to the displayed stroke rate)

Byte 2 Current Speed in 0.1m/s units (equal to the displayed speed)

Motor Voltage Message

During the power stroke (i.e. when motor voltage ADC output >=16), the ADC output of the sampled motor voltage is sent in pairs by use of three byte messages containing the following information

Byte 0 Identification Number = FDh

Byte 1 ADC output of previous motor voltage sample

Byte 2 ADC output of the current motor sample

Consequently, the first message is sent in the sample after the beginning of the power stroke (i.e. 62.5 ms after the stroke rate/speed message) and then at every other sample (i.e. every 125ms) until the end of the power stroke. If the power stroke contains an odd number of samples then byte 2 of the last message will be set to 0.

End of Power Stroke Message

At the end of the power stroke (i.e. when the motor voltage ADC output falls back below the threshold level of 16), a one byte message is sent containing the following information.

Byte 0 Identification Number = FCh

If the power stoke contained an odd number of samples, then transmission will be delayed by one sample (i.e. 62.5ms).



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