IDN 305 (S-0-0305) Allocation of Real-time Status Bit 1

The IDN of a real-time status signal that appears in real-time status bit 1 (AT status word, bit 6).

Two real time status bits are defined within the AT status word (bits 6 and 7) and are continuously updated by the drive during CP4. The following rules govern the assignment and use of a real time status bit (i.e., writing IDN 305 or 307):

Only status signal IDNs of type binary may be assigned to the real time status allocation IDNs.

The exception is IDN 0, which indicates that the real time status bit is undefined.

The following IDNs may be assigned as RTS signals: IDN 0 , IDN 336 , IDN 400 , IDN 403 , IDN 409 , IDN 410 , IDN 411 and IDN 412 .

The master should no longer evaluate a previous real time status assignment after transmitting a write request for element 7 of a real time status bit allocation IDN.

The previously assigned real time status bit will remain valid until the service channel busy bit is set.

The master should not start evaluating a new real time status bit assignment until the service channel busy bit is reset by the drive.