Support for Easy Interfacing of ABB VFD’s with MultiSmart
MultiSmart Pump Station Manager, with firmware version 2.2.0 onwards, now includes support for easy interfacing of the ABB ACS550 and ACS800 series VFDs. After a study in the US and UK, it was found that the ABB VFD’s are widely used in Pump Station Controls.
ABB - ACS800 Drive
Having support for the MODBUS RTU capability MultiSmart can be interfaced to any VFD’s with MODBUS support for bringing the data in and to send controls to the drives, and these data can be easily brought to a SCADA system. This process is fairly easy and straight forward with the help of the buttons on the MultiSmart faceplate. The only time consuming part is adding the MODBUS points by going through the VFD data sheet.
However, after identifying the customer demands, this integration process is further simplified for selected ABB VFD’s in MultiSmart firmware version 2.2.0, which requires only a few button press. With this feature MultiSmart can now use the currents read from the VFD, instead of current read from the MultiSmart Motor Protection module, for generating the fault alarms.
Even though MultiSmart has the capability to stop the pumps based on faults, these faults are configured only to alarm due to the fact that the VFD will holdout the pumps from running. The relevant motor protection faults, when interfaced to these VFDs, are set to Auto Reset within MultSmart to avoid the need for two resets when the fault is cleared, thereby simplifying the steps involved with the operations.
The MODBUS communication can be either setup over a RS232 or over ethernet. A RS232 to 485 converter is required if the RS232 option is selected. Ethernet communication can be setup using a cross over cable or using a straight through ethernet cable with the help of an ethernet switch.
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