NORD Drivesystems BU0090 - Manual (Page 41)

4 Frequency inverters - settings and control elements
BU 0090 GB 41
4.5 Peripheral error on AS interface module
A peripheral error of an AS interface slave occurs if:
• No AC line input (mains) voltage is applied to the inverter
• The 24V supply (AUX 24V) to the AS interface module is not present
A peripheral error is not reported if an error specific to the inverter is present. If a peripheral error is active, the
signal statuses of the 4 Out data bits from the AS interface module to the AS interface master are set to LOW.
This must be taken into account in programming or processing (pos. logic) the input signals in the control unit.
NOTE
In order to prevent uncontrolled starting of the drive unit after a communication error, the user
should monitor peripheral errors in the control program. As soon as a peripheral error is
reported, the enable signal - which is parameterised via the BusIO Bits - should be reset by the
application program.
A second or better error monitoring facility would be to parameterise the error [7] (see P481) via
one of the four available AS interface BusIO Out Bits, and to evaluate or link this accordingly.
The error bit is set to "1" in case of no error, and is set to "0" if one of the following error
conditions occurs:
¾ Error specific to the frequency inverter
¾ Frequency inverter has no AC line input (mains) voltage
¾ AS interface module not ok (see error status LED indicators Section 4.3).
¾ Either the PWR AS interface power supply or the 24V power supply is missing!
Acknowledgement of the error [12] (see P480) should then be carried out via one of
the four available BusIO In Bits.