Special cases of PO data processing
Setting the process output data description separately allows for a great variety of combinations. Not all of them are technically meaningful, however.
In addition to the process output data, the digital input terminals are generally also used. In special cases, also the analog setpoint of the MOVITRAC® B frequency inverter is used.
Setpoint specification via fieldbus missing | If a communication interface is entered as setpoint source and if no setpoint is programmed for the process output data description, then the setpoint = 0 is generated in the inverter. |
No control word specification via fieldbus | If a communication interface is entered as control signal source and if no control word is programmed for the process output data description, then the ENABLE control command is specified in the inverter. |
Double assignment of the process output data channel | If several process output data words have the same setpoint description, only the process output data word that is read first will apply. The order in which the process output data words are processed in the frequency inverter is PO1 - PO2 - PO3. This means if PO2 and PO2 have the same setpoint description, only PO2 will take effect. The content of PO3 is ignored. |
