Version 3.0.0 Preliminary Documentation – May be Subject to Change 11-46
16-bit Counter:
The input is configured to count pulse on the input until the value in the
Measuring Window object (2090h) 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 Field
Value object (7100h). The timer is reset until the count value once again
reaches the Measuring Window. Error detection objects are not used, since
error detection is not possible in this mode.
NOTE: The difference between Frequency and Counter mode is that the
Frequency mode gives the number of pulses that occur in the Measuring Window
Period, while the counter gives the period of time it takes for the number of pulses
in the Measuring Window to be read at the input.
2.5. Fault
Detection
In addition to the 8 analog inputs, the 18 Digital Inputs module has the capability to detect and
report other faults. The types of faults it could detect are:
Module
Over-Temperature
Power Supply Over Voltage
Power Supply Under Voltage
The objects associated with Fault Detection are all manufacturer defined objects, and are
described in detail in the Object Dictionary.
These FAULTS are currently NOT supported by this module.
They are left here for compatibility purposes.
