Grundfos DDI Series

8
6.4 Data transmission (programming examples)
Example 1
The pump is to be switched on and off via PROFIBUS. The
setpoint (volume flow) and the operating mode are set on the
pump.
PROFIBUS settings
• for switching on the pump
– byte 1 = 00h
– byte 2 = 01h – set bit 0, switch on the pump
– byte 3 = 00h
– byte 4 = 00h.
• for switching off the pump
– byte 1 = 00h
– byte 2 = 00h
– byte 3 = 00h
– byte 4 = 00h.
Example 2
The pump is to be switched on and off via PROFIBUS. The
setpoint is 1 l/h and is transferred via PROFIBUS. The pump is to
be operated in slow mode.
PROFIBUS settings
• for transferring the setpoint
– byte 1 = 20 – set bit 5, accept setpoint
– byte 2 = 00h
– byte 3 = 03h – setpoint 1000 ml/h (decimal)
– byte 4 = E8h – corresponds to 03E8 in hexadecimal format.
The transferred setpoint can be read and monitored via the
feedback actual value for bytes 1 and 2.
• for switching on the pump and slow mode:
– byte 1 = 00h
– byte 2 = 03h – set bits 0 and 1, switch on pump and slow
mode
– byte 3 = 00h
– byte 4 = 00h.
7. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use appropriate waste collection services.
2. If this is not possible, contact the nearest Grundfos or
Grundfos Alldos company or service workshop.
Subject to alterations.