Setting By Means Of Pc Tool E-Products; Priority Of Settings; External Forced-Control Signals - Grundfos CRE Serie Notice D'installation Et De Fonctionnement

5.7 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.

5.8 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
5.8.1 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.
5.8.2 Priority of settings without bus communication
Priority Control panel or R100
Stop
1
Max.
2
3
4
Min.
5
Setpoint setting
6
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.
30
5.8.3 Priority of settings with bus communication
Priority
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.

5.9 External forced-control signals

The pump has inputs for external signals for these forced-control
functions:
•
•
5.9.1 Start/stop input
Functional diagram: Start/stop input:
External signals
Stop
Max.
Min.
Setpoint setting
Control panel External
or R100 signals
Stop
1
Max.
2
Stop
3
4
5
6
Start/stop of pump
Digital function.
Start/stop (terminals 2 and 3)
H
H
Bus
communication
Stop
Max.
Min.
Setpoint setting
Normal duty
Q
Stop
Q