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Grundfos CIU 501 Instructions

Grundfos CIU 501
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English (GB)
20
9.5 Pump status register block
Registers in this register block can be read by means of function
codes 0x03 and/or 0x04. They are read-only.
Address Register name Description
00201
Bits 0-1: RESERVED -
Bit 2: MaxFlowLimitEnabled
Indicates if the MaxFlowLimit is enabled (enable with register 00101, bit 5).
Only available on MAGNA3 and MGE model H.
0: Disabled
1: Enabled.
Bit 3: ResetAlarmAck
Indicates if a ResetAlarm command was acknowledged by the device. This bit will be set
when the CIU has accepted a ResetAlarm command, and the programmer can clear the
ResetAlarm bit. The ResetAlarmAck bit will automatically be cleared to 0 by the CIU when
the ResetAlarm bit is cleared by the master device, and a new ResetAlarm command can
be attempted by raising ResetAlarm bit again.
0: No acknowledgement
1: Command acknowledged.
This functionality is only used when AutoAcknowledgeEvents is disabled.
See section 9.2 CIM configuration register block.
Bit 4: SetpointInfluence
Indicates if setpoint influence is active.
0: Not active
1: Active.
Bit 5: AtMaxPower
Indicates if the E-pump is running at its power limit. Only available on MAGNA3 and MGE
model H.
0: Not running at power limit
1: Running at power limit.
Bit 6: Rotation
Indicates if the E-pump is rotating (running) or not.
0: No rotation
1: Rotation.
Bit 7: Direction
Indicates the current rotational direction of the E-pump.
0: Clockwise.
1: Counter-clockwise.
Bit 8: AccessMode
Indicates if the E-pump is locally or remotely controlled.
0: Local (a local control source with higher priority controls the E-pump)
1: Remote (controlled by Modbus master).
Bit 9: OnOff
Indicates if the E-pump is on or off.
0: Off (stopped, the green LED on the E-pump flashes)
1: On (started, the green LED on the E-pump is on).
Started does not necessarily indicate rotation, for instance in case of low-flow stop.
Bit 10: Fault
Indicates if there is a fault or not.
0: No fault
1: Fault (red LED on the E-pump is on).
Bit 11: Warning
Indicates if there is a warning or not. The E-pump will continue running even if there is a
warning.
0: No warning
1: Warning (red LED on the E-pump is on).
Bit 12: RESERVED -
Bit 13: AtMaxSpeed
Indicates if the E-pump is running at maximum speed.
0: No
1: Yes.
Bit 14: RESERVED -
Bit 15: AtMinSpeed
Indicates if the E-pump is running at minimum speed.
0: No
1: Yes.
00202 ProcessFeedback
Indicates the actual process feedback from the E-pump.
The scale is 0.01 %, so the valid value range is from 0 to 10000.
This value can be compared with the setpoint value.
Closed loop
Percentage of closed-loop feedback sensor range.
Open loop
Percentage of E-pump performance.
Common examples
4700: 47 %
8000: 80 %.

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Grundfos CIU 501 Specifications

General IconGeneral
BrandGrundfos
ModelCIU 501
CategoryController
LanguageEnglish

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