Grundfos CIU 501 User Manual

English (GB)
19
Modbus
address
Register name Description
Multi-B MPC DDD Multi-E model G Multi-E/TPED model H and later
2
MAGNA3-D
00101
Bit 0: RemoteAccessReq
Control bit that sets local or remote control.
0: Local
1: Remote (controlled by Modbus master).
Set this bit to 1 if a Modbus master should control the booster
system.
For Hydro MPC and DDD, it is also necessary to enable bus
control via the CU 35X control panel ("Settings" > "Secondary
functions" > "Control source", select "From bus").
If the RemoteAccessReq bit is set to logical 0, the Hydro MPC or
DDD will operate with local mode settings as selected on the CU
35X control panel. If you want local control, select this from the CU
35X control panel ("Settings" > "Secondary functions" > "Control
source", select "From the CU 35X"), and set the
RemoteAccessReq bit to 0.
●●●- ●●
Bit 1: OnOffReq
Control bit that switches the booster system to on or off.
0: Off (stop)
1: On (start).
●●●●●●
Bit 2: ResetAlarm
Control bit that resets alarms and warnings from the booster
system.
0: No resetting
1: Resetting alarm.
This control bit is triggered on rising edge only, i.e. setting logical 0
to 1.
See section 9.2 CIM configuration register block, address 00005,
for acknowledgement behaviour.
●●●●●●
Bit 3: RESERVED -
Bit 4: CopyToLocal
1
Copies ControlMode, OperationMode and Setpoint to Local, when
changing from Remote to Local,
----●●
Bit 5: ResetAccCounters
Resets the accumulation counters (volume and energy).
0: No resetting
1: Resetting.
-●●-●●
Bits 6-15: RESERVED -
00102 ControlMode
Sets the control mode.
0: Constant speed
1: Constant frequency
3: Constant head
4: Constant pressure
5: Constant differential pressure
6: Proportional pressure
7: Constant flow
8: Constant temperature
10: Constant level
128: AutoAdapt (Automatic adaption for DDD)
129: FlowAdapt
130: Closed-loop sensor
See section 10.1 Control modes.
Note that the control mode depends on the primary sensor, and
not all booster systems can run with all the control modes.
Note that DDD can run with constant pressure, proportional
pressure or automatic adaption.
-●●-●●

Grundfos CIU 501 Specifications

General

Brand	Grundfos
Model	CIU 501
Category	Controller
Language	English