Some channels not set to zero on groov RIO EMU module

Applies To:

Firmware for the following groov RIO module: GRV-R7-I1VAPM-3

Versions Affected:

All versions prior to 3.6.0

Resolved In Version:

3.6.0

Symptoms:

If you modify the default minimum threshold values for the following measurements, if the threshold is not met for a phase, some channels that are supposed to be set to zero are not:

Threshold Measurement	Expected Behavior	Actual (Incorrect) Behavior	Channels Affected by This Issue
Minimum Voltage Threshold Ratio	When the voltage falls below the Minimum Voltage Threshold Ratio or if the Minimum Voltage Threshold Ratio is set to 1.0, all input values for the phase should be set to zero except for the energy totals channels.	The Peak Voltage, Peak Current, and Frequency channels are not set to zero.	Phase A, channels 6, 7, and 8. Phase B, channels 24, 25, and 26. Phase C, channels 42, 43, and 44.
Minimum Current Threshold	When the current falls below the Minimum Current Threshold, all input values for the phase should be set to zero except for the Voltage, Frequency, and energy totals channels.	The Peak Voltage and Peak Current channels are not set to zero.	Phase A, channels 6 and 7. Phase B, channels 24 and 25. Phase C, channels 42 and 43.
Power Creep Adjustment (power threshold)	When true power falls below the Power Creep Adjustment power threshold, all input values for the phase should be set to zero except for the Voltage, Current, Frequency, and energy totals channels.	The Peak Voltage and Peak Current channels are not set to zero.	Phase A, channels 6 and 7. Phase B, channels 24 and 25. Phase C, channels 42 and 43.

Workaround:

Adjust your control program to handle each threshold measurement as follows:

Measurement	Workaround
Minimum Voltage Threshold Ratio	For each phase, monitor the Voltage and Current channel values. When the Voltage and Current channel values are set to zero, ignore the Peak Voltage, Peak Current, and Frequency channel values and treat them as zero.
Minimum Current Threshold	For each phase, monitor the Current channel value. When the Current channel value is set to zero, ignore the Peak Voltage and Peak Current channel values and treat them as zero.
Power Creep Adjustment	For each phase, monitor the True Power channel value. When the True Power channel value is set to zero, ignore the Peak Voltage and Peak Current channel values and treat them as zero.

Resolution:

Opto 22 has resolved this issue.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com

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