320 Fieldbus control with embedded fieldbus DCU communication profileBecause the DCU profile extends the control and status interface to 32 bits, twodifferent signals are needed for both the control words (0301 and 0302) and statuswords (0303 and 0304).Control wordsThe following tables describe the Control word content for the DCU profile.DCU profile Control word, parameter 0301 FB CMD WORD 1Bit Name Value Information0 STOP 1 Stop according to either the stop mode parameter (2102) orthe stop mode requests (bits 7 and 8).Note: Simultaneous STOP and START commands result ina stop command.0 No operation1 START 1 StartNote: Simultaneous STOP and START commands result ina stop command.0 No operation2 REVERSE 1 Reverse direction. The direction is defined by using theXOR operation on bit 2 and 31 (= sign of the reference)values.0 Forward direction3 LOCAL 1 Enter local control mode.0 Enter external control mode.4 RESET -> 1 Reset.other No operation5 EXT2 1 Switch to external control EXT2.0 Switch to external control EXT1.6 RUN_DISABLE 1 Activate Run disable.0 Activate Run enable.7 STPMODE_R 1 Stop along currently active deceleration ramp (bit 10). Bit 0value must be 1 (STOP).0 No operation8 STPMODE_EM 1 Emergency stop. Bit 0 value must be 1 (STOP).0 No operation9 STPMODE_C 1 Coast to stop. Bit 0 value must be 1 (STOP).0 No operation10 RAMP_2 1 Use acceleration/deceleration ramp pair 2 (defined byparameters 2205…2207).0 Use acceleration/deceleration ramp pair 1 (defined byparameters 2202…2204).11 RAMP_OUT_0 1 Force ramp output to zero.0 No operation
