15 |
M 5 7 7 9
5.4.1.3
SERVO Output Type
The SERVO output allows driving servo motors that control position. A Servo output is a special case
of the PWM output, where the ON time varies between 1.0 msec and 2.0 msec or between 0.5
msec and 2.5 msec, with the lower bound representing 0 degrees and the upper bound
representing 180 degrees of angular travel. The typical non-critical frequency is 50 or 100 Hz. Servo
outputs are always active high.
Option
Value
Description
Rate
100 Hz
Signal has a constant 100 Hz frequency
50 Hz
Signal has a constant 50 Hz frequency
Pulse Width
Range
1.0-2.0 msec On time varies between 1 and 2 msec
0.5-2.5 msec On time varies between 0.5 and 2.5 msec
Example
: For the percent of angular travel, if the pulse width range is set to a range of 1.0-2.0 msec,
then an output of 50% of angular travel represents 1.5 msec or 90 degrees of travel.
5.4.2
Sensor Output Mapping
The SP-006 allows mapping a scaled copy of any of the input values to any of the outputs. To set a mapped
output, it must not be associated with any alarm or ON/OFF control module. Two user-defined values,
Scaling Minimum
and
Scaling Maximum
, define the sensor range that is mapped to the output. A Factory
Reset sets the Input Minimum to 0 and the Input Maximum to 100.
The scaling equations for direct and reverse output percentages are given below.
𝑂𝑂𝑢𝑢𝑢𝑢𝑢𝑢𝑢𝑢𝑢𝑢
𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑢𝑢
𝐷𝐷𝐷𝐷𝐷𝐷𝐷𝐷𝐷𝐷𝐷𝐷
=
�
𝑆𝑆𝑃𝑃𝑆𝑆𝑆𝑆𝑆𝑆𝑃𝑃𝑆𝑆
𝑀𝑀𝑆𝑆𝑀𝑀𝑆𝑆𝑀𝑀𝑢𝑢𝑀𝑀 − 𝐼𝐼𝑃𝑃𝑢𝑢𝑢𝑢𝑢𝑢
𝑅𝑅𝑃𝑃𝑆𝑆𝑅𝑅𝑆𝑆𝑃𝑃𝑆𝑆
𝑆𝑆𝑃𝑃𝑆𝑆𝑆𝑆𝑆𝑆𝑃𝑃𝑆𝑆
𝑀𝑀𝑆𝑆𝑀𝑀𝑆𝑆𝑀𝑀𝑢𝑢𝑀𝑀 − 𝑆𝑆𝑃𝑃𝑆𝑆𝑆𝑆𝑆𝑆𝑃𝑃𝑆𝑆
𝑀𝑀𝑆𝑆𝑃𝑃𝑆𝑆𝑀𝑀𝑢𝑢𝑀𝑀�
× 100%
Figure 18: Sensor output mapping configuration example
100% Angular Travel = 2.0 msec
50 Hz
Figure 17: SERVO output example
1.0 msec = 0°
1.5 msec = 90°
2.0 msec = 180°
