Title: 32 Pumper modbuss teknisk data.pdf.pdf
been changed from default.4. The slave returns data value 0xFFFF (65535).4. The slave returns data value 0xFFFF (65535).a) The value is unavailable. A data valueof 0xFFFF does not necessarily indicate an error condition. It means that the value is unavailable from the E-pump.b) The E-pump is not configured to show the value or lacks a sensor to read the value.5. The slave does not react to control actions or to writing of settings.a) The E-pump might be in "Local" mode, in which case Operating mode, Control mode and Setpoint cannot be changed from bus. Register 00201 bit 8 AccessMode must be "1" (=Remote) for bus control to be active.RemedyCheck the visual diagnostics on theModbus slave. Normal conditions are that the Grundfos GENIbus LED2 is permanently green and that the Modbus TCP LED1 is off or flashing green. If not, see section 14.3.1 LED status.