ITT PumpSmart PS220, Руководство по конфигурации и эксплуатации

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PS220 Configuration & Operation Guide
PS220 136
Functions &
Features
Critical Speed Windows
The PumpSmart PS220 can be configured to bypass operating speed windows to avoid
resonance frequencies that may be encountered when running a pumping system. Refer to the
pump manufacturer to determine if the pump being controlled has a critical speed within the
defined operating speed range (between 30.11 MIN SPEED and 30.12 MAX SPEED).
Parameter Name Value/Range Note(s)
22.51 CRITICAL SPEED FUNC
0-1
0-Disables [default]
0000 will display as default
Bit 0 will need to be
changed to a 1 to Enable
22.52 CRITICAL SPEED 1 LOW
-30000 to +30000
0 [default]
Refer to the pump
manufacturer for critical
speeds or determine these
speeds during commissioning
of the system.
22.53 CRITICAL SPEED 1 HIGH
-30000 to +30000
0 [default]]
22.54 CRITICAL SPEED 2 LOW
-30000 to +30000
0 [default]
22.55 CRITICAL SPEED 2 HIGH
-30000 to +30000
0 [default]
22.56 CRITICAL SPEED 3 LOW
-30000 to +30000
0 [default]
22.57 CRITICAL SPEED 3 HIGH
-30000 to +30000
0 [default]
NOTE: This function will not allow the operating speed to be maintained within the bands
selected and should not be used with any PS220 PROCESS CONTROL MODES.
Diode Test
A Diode test may need to be performed when drive faults occurred. Typically these are a result
of incoming power problems, or they may be the result of a fault Input Bridge. This procedure
will show how measure and document readings necessary to determine a remedy.
1. Take readings of the VFD input diode bridge.
• Make sure the mains power supply (460 VAC) is OFF.
• Set the Digital MultiMeter Meter to be in the diode mode
• Place one of the leads on the UDC+ terminal and the second one on one of the input
phases (L1, L2, and L3) per the table below. Document the readings in the table below.
• Repeat the test for the other two input phases and note the reading.
• Switch the DMM leads now and repeat the test. Document the readings in the table below.
• Typical readings will show values. Any reading that shows “OL” will be problematic.