Setting By Means Of Pc Tool E-Products; Priority Of Settings; External Forced-Control Signals - Grundfos CRE Instructions Manual

6.7 Setting by means of PC Tool E-products

Special setup requirements differing from the settings available via
the R100 require the use of Grundfos PC Tool E-products. This
again requires the assistance of a Grundfos service technician or
engineer. Contact your local Grundfos company for more
information.

6.8 Priority of settings

The priority of settings depends on two factors:
1. control source
2. settings.
1. Control source
Control panel
R100
External signals
(external setpoint signal, digital inputs, etc.)
Communication from another control system via bus
6.8.1 2. Settings
• Operating mode Stop
• Operating mode Max. (Max. curve)
• Operating mode Min. (Min. curve)
• Setpoint setting.
An E-pump can be controlled by different control sources at the
same time, and each of these sources can be set differently.
Consequently, it is necessary to set an order of priority of the
control sources and the settings.
If two or more settings are activated at the same time, the
pump will operate according to the function with the
highest priority.
6.8.2 Priority of settings without bus communication
Priority Control panel or R100
1 Stop
2 Max.
3
4
5 Min.
6 Setpoint setting
Example: If the E-pump has been set to operating mode Max.
(Max. frequency) via an external signal, such as digital input, the
control panel or R100 can only set the E-pump to operating mode
Stop.
6.8.3 Priority of settings with bus communication
Control panel
Priority
or R100
1 Stop
2 Max.
3
4
5
6
32
External signals
Stop
Max.
Min.
Setpoint setting
External Bus
signals communication
Stop Stop
Max.
Min.
Setpoint setting
Example: If the E-pump is operating according to a setpoint set via
bus communication, the control panel or R100 can set the E-pump
to operating mode Stop or Max., and the external signal can only
set the E-pump to operating mode Stop.

6.9 External forced-control signals

The pump has inputs for external signals for these forced-control
functions:
• start/stop of pump
• digital function.
6.9.1 Start/stop input
Functional diagram: Start/stop input:
Start/stop (terminals 2 and 3)
H
H
Normal duty
Q
Stop
Q