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6. ADVANCED MONITORING SCENARIOS
6/2022
6. ADVANCED MONITORING SCENARIOS
6.1 STATISTICS CALCULATION AND MONITORING
The PLC program will periodically obtain and store output current and internal temperature data in a rolling
buffer. It will store the past hourly averages for 25 hours on a rolling basis.
If the present average of output current or temperature has increased by more than 10% from previous
averages, the PLC will set an alarm to notify the user.
6.2 POWER SUPPLY MONITORING MODES
The PLC program will be configured to allow for two different operating modes based on the power supply
setup. The two different configurations are redundant power supply monitoring mode and increased power
supply monitoring mode and can be configured on the PLC.
Both modes will provide an early threshold warning and a critical threshold alarm. The thresholds will be
configurable by the user.
6.2.1 REDUNDANT POWER SUPPLY MONITORING
The PLC will monitor the sum of the output currents and provide an alarm when the sum of the output
currents is greater than the allowable output on a single power supply. The early warning and critical
warning thresholds can be set by the operator.
6.2.2 INCREASED POWER SUPPLY MONITORING
Increased Power Supply Monitoring – the PLC will monitor the sum of the output current and provide an
alarm when the sum of the output currents reaches configurable limits. The early warning and critical
warning thresholds can be set by the operator.
6.3 LOAD SHARING MONITORING
When the two supplies are connected in parallel operation, the PLC program will monitor the output currents
and set an alarm when the ratio of the currents is greater than 60/40.
6.4 TOTAL USE-TIME MONITORING
The PLC program will allow the user to enter early warning and critical warning total-on-time thresholds.
The PLC will monitor the total use-times of the power supplies and set a warning condition when the use-time
reaches the early warning threshold as well as an alarm when it reaches the critical warning threshold.
Page: 54
User Guide
A272-365
Emerson.com/SolaHD
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