F01512 — BICO: No scaling available

F01512 (BICO: No scaling available) is raised when an attempt is made to determine a conversion factor for a scaling that does not exist. It concerns the BICO signal interconnection: once a BICO output is connected to a BICO input, the drive converts between the two signals using the reference values. If the interconnection runs between different drive objects (DO) and the signals are normalized differently — different normalized units on output and input, or the same units but different reference values — the drive must calculate a conversion factor; when no scaling exists for that conversion, this fault follows. The manuals for all listed converter families give this same cause; the G120XA documentation additionally works out the two constellations reproduced below.

• An attempt was made to determine a conversion factor for a scaling that does not exist. The requested BICO interconnection itself was established, but the conversion between BICO output and BICO input is made using the reference values — and no scaling is available for it.
• Output and input lie in different drive objects and are normalized to different units, for example a BICO output with a voltage normalized unit feeding a BICO input with a current normalized unit. The drive then forms the factor p2002/p2001 between output and input, where p2002 contains the reference value for current and p2001 the reference value for voltage.
• Output and input carry the same normalized unit but sit in different drive objects whose reference values differ, for example a voltage-normalized output in DO1 and a voltage-normalized input in DO2 whose voltage reference values (p2001) have different values. The drive then forms the factor p2001(DO1)/p2001(DO2).

1. Apply a scaling, or check the transfer value of the affected BICO interconnection — this is the remedy the manual gives for the code.
2. Use the fault value to locate the point of trouble: it names the unit (for example the unit corresponding to SPEED) for which the factor was sought, and in the G120XA decoding it contains the parameter number of the BICO input (signal sink).
3. Examine the connected BICO output and input for the constellations described above: different drive objects with different normalized units, or the same unit with different reference values (p2001, p2002) in the two objects.

• The fault value is held in r0949 and is to be interpreted as a decimal number.
• Value: the unit (for example the unit corresponding to SPEED) for which an attempt was made to determine a factor.
• The G120XA documentation gives a second decoding: the parameter number of the BICO input (signal sink).

• r0949 — fault value: read it here as a decimal number to identify the unit (e.g. SPEED) — or, in the G120XA decoding, the BICO input parameter number — to which the failed scaling attempt refers.
• p2001 — reference voltage: reference value from which the drive calculates the conversion factor, e.g. as p2001(DO1)/p2001(DO2) when two drive objects have different voltage references.
• p2002 — reference current: reference value that, together with p2001, forms the factor p2002/p2001 when a voltage-normalized BICO output is connected to a current-normalized BICO input.

The drive coasts down while this fault is active and must be acknowledged before it will start. The acknowledgment is a POWER ON: switch the converter power supply off and then on again — a reset from the operator panel alone does not clear this fault. Correct the BICO interconnection first (apply the scaling or check the transfer value), then power the converter down and up and restart the drive.