Bus Signal; Priority Of Settings - Grundfos CRE Series Installation And Operating Instructions Manual

12. Bus signal

The motor enables serial communication via an RS-485 input.
The communication is carried out according to the Grundfos
GENIbus protocol and enables connection to a building
management system or another external control system.
Via a bus signal, it is possible to remote-set motor operating
parameters, such as setpoint and operating mode. At the same
time, the motor can, via the bus, provide status information about
important parameters, such as actual value of control parameter,
input power and fault indications.
Contact Grundfos for further information.
If a bus signal is used, the number of settings
Note
Note
available via the R100 or Grundfos GO Remote
will be reduced.

13. Priority of settings

The motor can always be set to operation at max. speed or to
stop with the R100 or Grundfos GO Remote.
If two or more functions are enabled at the same time, the motor
will operate according to the function with the highest priority.
Example: If, via the digital input, the motor has been set to max.
speed, the motor control panel, the R100 or Grundfos GO
Remote can only set the motor to "Manual" or "Stop".
The priority of the settings appears from the table below:
Priority Start/stop button
1
2
3
4
5
6
7
8
9
10
11
12
13
14
* If the bus communication is interrupted, the motor will resume
its previous operating mode, for example "Stop", selected with
the R100, Grundfos GO Remote or on the motor control panel.
R100, Grundfos GO Remote
or control panel on motor
Stop
Stop*
Manual
Max. speed*
Min. speed
Start
Digital input Bus communication
Stop
Stop
Max. speed
Min. speed
Start
Max. speed
Min. speed
Start
35