Resolver with pole pair number 0x2C43 >=2: Status bit "Absolute encoder selected" (0x2833-Bit04) is set incorrectly (corrected from V01.05.02)
Corrected from:
Servo-Inverter i950 FW: from V01.05.02.1788
Response of the new version:
Higher-pole resolvers with pole pair number 0x2C43 >=2 (or 0x2C53 >=2) are now correctly not evaluated as absolute encoders. SinCos encoder types with line number/period number = 1 are now evaluated as absolute encoders. The status absolute position available is only set if there is no encoder error, e.g. wire breakage. The status bits 4 and 5, or 10 and 11 in Lenze status word 2 are set accordingly for both encoder types.
What happens?
Higher-pole resolvers with pole pair number 0x2C43 >=2 are erroneously evaluated as absolute encoders. Conversely, special SinCos encoder types with line number/period number = 1 are erroneously not evaluated as absolute encoders. The corresponding status bits 4 and 5 (SlotA), or 10 and 11 (SlotB) in Lenze status word 2 are set incorrectly.
Definition Absolute encoder: An encoder type can be used by the drive controller as an absolute encoder if it can represent the absolute position at least within one complete revolution. Status bits 4, 5, 10 and 11 in Lenze status word 2 indicate whether such an absolute encoder is present. For resolvers, only resolver types with pole pair number = 1, i.e. two-pole resolvers, meet this definition. Higher-pole resolvers with a pole pair number >=2 do not, however. Special SinCos encoders with line number/period number = 1 enable the absolute position to be displayed over one revolution via SinCos evaluation and thus meet the requirements for absolute encoders.
