Overview of NC errors TwinCAT 36 Version: 1.1 Error(Hex) Error(Dez) Error type Description 4431 17457 function "External hardware latch activation (encoder)" The activation of the external hardware latch (only available on the KL5101) is initiated explicitly by an ADS command (called from the PLC program of the Visual Basic interface). If this function has already been activated, but the latch value has not yet been made valid by an external signal ("external latch valid"), another call to the function is refused with this error.
4432 17458 function "External hardware latch activation (encoder)" If a referencing procedure has previously been initiated and the hardware still signals a valid latch value ("latch valid"), this function must not be called. In practice, however, this error can almost never occur. 4433 17459 function "External hardware latch activation (encoder)" If this function has already been initiated and the hardware is still signaling that the external latch value is still valid ("extern latch valid"), a further activation should not be carried out and the commando will be declined with an error (the internal handshake communication between NC and IO device is still active).
In that case the validity of the external hardware latch would immediately be signaled, although the old latch value would still be present. 4434 17460 monitoring "Encoder function not supported" An encoder function has been activated that is currently not released for use, or which is not even implemented. 4435 17461 monitoring „Encoder function is already active“ An encoder function can not been activated because this functionality is already active. 4440 17472 initialization "Encoder initialization" Encoder has not been initialized. Although the axis has been created, the rest of the initialization has not been performed (1. Initialization of axis I/ O, 2. Initialization of axis, 3.
Reset axis). 4441 17473 address "Axis address" The encoder does not have an axis, or the axis address has not been initialized. 4442 17474 address "I/O input structure address" The drive does not have a valid I/O input address in the process image. 4443 17475 address "I/O output structure address" The encoder does not have a valid I/O output address in the process image. 4450 17488 monitoring "Encoder counter underflow monitoring" The encoder's incremental counter has underflowed. 4451 17489 monitoring "Encoder counter overflow monitoring" The encoder's incremental counter has overflowed.
4460 17504 monitoring "Software end location minimum (axis start)" With active monitoring of the software end location for a minimum, a start has been made from a position that lies below the software end location minimum. 4461 17505 monitoring "Software end location maximum (axis start)" With active monitoring of the software end location for a maximum, a start has been made from a position that lies above the software end location maximum. 4462 17506 monitoring "Software end location minimum (positioning process)" With active monitoring of the software end location for a minimum, the actual position has fallen below the software end location minimum.
In the case of servo axes (continuously driven axes) this limit is expanded by the magnitude of the parameterized following error window (position).