Command Control, Operational Commands The command control word is used to control the unit. Each bit gives access to a command or state as if the operator was using the keypad. Applicaton Layer Bits initiating a command (6 to 11) must change state in order to cause the command to begin. For example, to reset totalizer 1, Bit 8 must be cleared to 0, then set to 1. It can stay set or clear for any period. BW500 and SF500 BW500/L Bit 00 and 03: PID Mode (BW500 and SF500 only) Sets the mode of PID control to either manual (output determined by P410 – PID Manual) or auto (output determined by PID control in instrument).
Page 32 SmartLinx PROFIBUS DP – INSTRUCTION MANUAL 7ML19981AQ03 Bit # Description Bit Clear (0) Bit Set (1) 00 PID 1 mode manual auto 01 PID 1 freeze no yes 02 PID 1 setpoint source local remote 03 PID 2 mode manual auto 04 PID 2 freeze no yes 05 PID 2 setpoint source local remote 06 zero no change start 07 span no change start 08 reset totalizer 1 no change reset 09 reset totalizer 2 no change reset 10 reset batch totalizer no change reset 11 print print 12 reserved 13 reserved 14 reserved 15 reserved Bit # Description Bit Clear (0) Bit Set (1) 06 zero no change start 07 span no change start 08 reset totalizer 1 no change reset 09 reset totalizer 2 no change reset 10 reserved 11 print print 12 reserved 13 reserved 14 reserved 15 reserved