Version 2.0.3 Preliminary Documentation – May be Subject to Change 33-36
Input Impedance
Voltage 1 MOhm
Current 250 Ohms
PWM, frequency, 16-bit counter 1 MOhm
Table 1.0 Description of Inputs to AX030200
Input Type
Description
Disable Inputs
Each input can be configured as a disable input command. When disable is selected, no CAN messages
associated with that channel are sent to the network.
Universal Analog Inputs
Up to 8 analog inputs are available.
0…5VDC or 0…10VDC
The offset is in volts and the resolution setpoint is V/bit, when sending a CAN message.
Error detection setpoints are interpreted in volts.
4…20mA or 0…20mA
The offset is in milliamps and the resolution setpoint is mA/bit, when sending a message.
Error detection setpoints are interpreted in milliamps.
Digital Inputs
Up to 8 digital inputs are available.
The input accepted is active high (switch is connected to a +V signal when ON). The controller interprets the offset
as a state (OFF=0 or ON=1) and the resolution setpoint as state/bit, when sending the message. Error detection
setpoints are not used, since error detection is not possible in this mode.
PWM Signal Inputs
Up to 8 PWM inputs are available to interface to a PWM signal from an ECM, PLC, etc.
PWM Signal Frequency: 50 – 10,000 Hz
Amplitude: 5-12V
PWM Duty Cycle: 0 to 100%
The offset is interpreted as percent duty cycle (%dc) and the resolution setpoint as %dc/bit, when sending the CAN
message. Error detection setpoints will be interpreted in %dc.
NOTE: If the Input Maximum setpoint is set for a low frequency (<=50Hz), the
controller will use a different technique to measure the frequency. Instead of
measuring the pulses in the Measuring Window (this parameter is ignored) it will
measure the time between rising edges of the signal. If more than 10 seconds
pass without a transition, the input will be read as zero. The frequency range in
this mode is 0.5-50Hz, with up to 2 decimal places of resolution.
Pulse Inputs
Up to 8 pulse inputs are available.
This input counts the number of pulses over the period of the measuring window setpoint and calculates the
frequency of the pulses.
Hz = With a pulse per revolution of 0, the controller calculates the offset in Hz and the resolution setpoint as Hz/bit,
when sending the CAN message. Error detection setpoints are in Hertz.
RPM = With a non-zero pulse per revolution, the frequency is interpreted as a RPM input. The offset is in
revolutions per minute (RPM) and the resolution setpoint is RPM/bit. Error detection setpoints are interpreted in
RPM.
NOTE: The difference between Frequency and Counter mode is that the
Frequency mode measures the number of pulses that occur in the Measuring
Window period and calculates frequency, while the counter gives the period of
time (in milliseconds) it takes for the number of pulses in the Measuring Window
to be read at the input.
16-bit Counter Inputs
Up to eight 16-bit counter inputs are available.
A counter input cannot be used to control an output.
The input is configured to count pulses on the input until the value in the measuring window setpoint is reached.
While the counter is active, a timer with a 1ms resolution is running in the background. When the count has been
reached, the value in the 1ms timer is captured and updated to the input feedback variable. The timer is reset until
the count value once again reaches the measuring window. Input and error detection setpoints are not used, since
error detection is not possible in this mode.
NOTE: If set to be a 16-bit counter, the input can no longer be used as either a control signal or an enable input to
any of the outputs on the ECU.
