Fault Mode/Program Mode Operation; Product Performance; Update Rate For Output Channels; Update Rate For Input Channels - Spectrum Controls Micro800 User Manual

Product Performance

Chapter 3: Configuring the 2085-IF4XOF4-SC Using CCW
2 mA, the module reports open circuit condition within 5 seconds.
For the 0 to 20 mA range type, open circuit condition results in a measured value
of 0 mA which is no difference from a measured value of 0 mA when a circuit is
present. The appropriate Under Range bit will be floating but the channel open
circuit condition will not be reported. To protect the module circuit, if the input
current is negative, it will be clamped to 0 mA that the appropriate Under Range
bit will also be floating.

3.7.8 Fault Mode/Program Mode Operation

During operation, the module may detect a hardware fault or that the system has
changed the run mode (run/program).
• If a hardware fault is detected or controller Program Mode is detected
-
All Outputs are turned off.
-
All Inputs stop reporting input data to controller.
• If the hardware fault clears, the Outputs and Inputs resume the previous
setting if no configuration content change has occurred. Both Outputs
and Inputs resume normal operation when Run Mode is detected.

3.8.1 Update Rate for Output Channels

The Output Ch<x> (AO_03:00) is continuously scanned by the module and
outputs are scaled as data arrives. The rate at which the data arrives is determined
by the connected system. The 2085-IF4XOF4-SC is expected to process output
data and status within 10 ms.
The input channel scan time will be based on each channel's Input ADC Filter
configuration and is the sum of the multiplexer settling time, PGA register setup
time, ADC conversion period (which is 2/filter + 1 ms), and microcontroller
processing overhead.
When the timer option like detecting open circuit condition is enabled, each
channel performs two measurements to achieve user-defined requirements. By
enabling that time, the channel scan rate may vary. Below is the approximate
input update rate based on different input ADC filter selections.
Total
ADC Filter
Channel
Selection
Scan Time
17 Hz 131
4 Hz
491
62 Hz
470 Hz
Keep in mind:
All timing unit is in ms.
•

3.8.1 Update Rate for Input Channels

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User's Manual Pub. 0300307-01 Rev. A
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