Grundfos CIU 501 User Manual

English (GB)
36
10.2 Tank-filling applications
Normally, the Hydro Multi-B runs in pressure-boosting mode, but
you can also set it to run in tank-filling mode.
Proceed as follows:
1. Set the application to tank-filling mode on CU 323 via
Grundfos PC Tool E-Products. This cannot be set via Modbus.
2. To enable bus control via Modbus, set RemoteAccessReq,
register 000101, bit 0, to the value of "1".
3. Set the tank height with Setpoint, register 00104, to 0.01 m.
4. Set start and stop levels as well as alarm and warning limits
with registers 00111, 00112, 00113 and 00114. Note that
these values are set in percentage of the total tank height.
10.3 Setpoint in closed-loop control
Hydro MPC and Multi-E
The setpoint is written to register 00104 Setpoint as a percentage
value scaled in 0.01 % of the sensor maximum value, register
00222 FeedbackSensorMax. The sensor minimum value is
always 0. The selected setpoint is reflected in register 00343
UserSetpoint with the same scaling.
The actual setpoint, whether it has been set via Grundfos GO
Remote, the pump display, the pump buttons or the fieldbus, can
be read from register 00308 ActualSetpoint. It is a percentage
value scaled in 0.01 % of register 00222 FeedbackSensorMax.
Generally, the actual setpoint value represents head, pressure,
flow, temperature and so on depending on how the feedback
sensor has been set to measure. The unit of measure can be
read from register 00220 FeedbackSensorUnit.
Unless a setpoint influencing function, like proportional influence,
is active, ActualSetpoint equals UserSetpoint.
It is possible to calculate back and forth between the setpoint in
percent and its scaled value:
X
act
[unit] =
X
set
[%] × FeedbackSensorMax × FeedbackSensorUnit
* Percentage of sensor maximum.
Fig. 27 Setpoint in closed-loop control for Hydro MPC and
Multi-E
TPED and MAGNA3-D
The setpoint is written to register 00104 Setpoint as a percentage
value scaled in 0.01 % of the setpoint range [r
min;
r
max
]. The
selected setpoint is reflected in register 00343 UserSetpoint with
the same scaling.
The actual setpoint, whether it has been set via Grundfos GO
Remote, the pump display, the pump buttons or the fieldbus, can
be read from register 00308 ActualSetpoint. It is a percentage
value scaled in 0.01 % of register 00222 FeedbackSensorMax.
Generally, the actual setpoint value represents head, pressure,
flow, temperature and so on depending on how the feedback
sensor has been set to measure. The unit of measure can be
read from register 00220 FeedbackSensorUnit.
It is possible to calculate back and forth between ActualSetpoint
in percent and its scaled value:
X
act
[unit] =
X
act
[%] × FeedbackSensorMax × FeedbackSensorUnit
The setpoint range limits r
min
and r
max
cannot be read from the
fieldbus but are found in the pump data sheet or in the Grundfos
GO Remote "Setpoint" menu.
1
Percentage of setpoint range.
2
Percentage of sensor maximum.
Fig. 28 Setpoint in closed-loop control for TPED and
MAGNA3-D
10.4 Setpoint in open-loop control
Hydro MPC and Multi-E
The setpoint is written to register 00104 Setpoint as a percentage
value scaled in 0.01 % of the maximum performance. The
selected setpoint is reflected in register 00338 UserSetpoint with
the same scaling.
The actual setpoint, whether it has been set via Grundfos GO
Remote, the pump or controller display or buttons, or the fieldbus,
can be read from register 00308 ActualSetpoint, and it reflects
whatever limitations, for example power or frequency limits, that
might be active in the system. It equals the value that the booster
system actually uses.
* Percentage of system performance.
Fig. 29 Setpoint in open-loop control for Hydro MPC and Multi-
E
Tank-filling mode is not possible with Hydro MPC and
Multi-E.
TM07 0147 4317
X
set
0 %
100 %
X
act
FeedbackSensor
Max (Register
00222)
Setpoint*
(Register 00104)
UserSetpoint*
(Register 00343)
ActualSetpoint*
(Register 00308)
TM07 0148 4317TM07 0149 4317
X
set
0 %
100 %
X
act
FeedbackSensor
Max (Register
00222)
r
min
r
max
100 %
Setpoint
1
(Register 00104)
UserSetpoint
1
(Register 00343)
ActualSetpoint
2
(Register 00308)
X
act
X
set
0 %
100 %
Setpoint*
(Register 00104)
UserSetpoint*
(Register 00343)
ActualSetpoint*
(Register 00308)

Grundfos CIU 501 Specifications

General

Brand	Grundfos
Model	CIU 501
Category	Controller
Language	English