30 |
M 5 7 7 9
Servo Rate
Name
Description
0
100 Hz
PWM signal has constant 100 Hertz frequency (10 msec repetition
rate) with 0 – 100 % duty cycle
4
50 Hz
PWM signal has constant 50 Hertz frequency (20 msec repetition
rate) with 0 – 100 % duty cycle
6.6.2
Output Type
Smart Sensor probes support NULL (0), ON/OFF (1), PWM (2) and SERVO (3) outputs. When set to NULL the
output signal will be left in a high impedance state. When set to ON/OFF the Rate and Servo Range controls
have no effect. When the SERVO type is selected the Duty-Cycle is restricted so the output signal is either
0.5 – 2.5 msec or 1.0 to 2.0 msec based on the Servo Range bit.
6.6.3
Active State
Smart Sensor discrete outputs may be configured as Active HIGH or Active LOW. When set to 1 (Active High),
the output will be high impedance when active. When set to 0 (Active Low), the output will be low
impedance (~ 0.0 volts) when active. The Factory reset value is 0 (Low).
6.6.4
Mapping Enabled
The read-only Mapping Enabled bit indicates that the output may be optionally directly mapped to a sensor
input based on the Sensor Mapping field. If the Mapping Enabled bit is clear no mapping is supported, and
the Sensor Mapping field is ignored.
6.6.5
Sensor Mapping
The Sensor Mapping value may select ‘no mapping’ or any of Sensor 0..3. If no mapping is selected the
output may be directly controlled by writing a value from 0 – 100 % to the internal Output Value. If a Sensor
is selected and the hardware supports the mapping the output will track the selected sensor value, scaled by
the Input Minimum and Input Maximum values.
If Sensor Mapping is enabled for PWM outputs the scaling values are used such that a signal input at or
below the Scaling Low-value results in a 0% output and a signal input at or above the Scaling High-value
results in a 100% PWM duty cycle.
If Sensor Mapping is enabled for SERVO outputs the scaling values are used such that a signal input at or
below the Scaling Low-value results in a minimum (0.5 or 1.0 msec) pulse width and a signal input at or
above the Scaling High-value results in a maximum (2.0 or 2.5 msec) pulse width.
