Grundfos CIU 501 Instructions

English (GB)
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13.11 Setting the control mode
This section shows how to set a control mode.
In the example, slave address 0x01 is used, and the control mode
is set to 1 (Constant frequency).
Request from master to slave
Example of response from slave to master
If there is no response from the slave, see Fault finding, section
14.1.2 CIM/CIU 200 Modbus communication faults or 14.2.2 CIM/
CIU 250 Modbus GSM/GPRS communication faults.
13.12 Starting the E-pump
This section shows how to start the E-pump.
In the example, slave address 0x01 is used.
Set the ControlRegister to the following values:
Hence the value to set is 0b0000000000000011 = 0x0003.
Request from master to slave
Example of response from slave to master
If there is no response from the slave, see section 14.1.2 CIM/
CIU 200 Modbus communication faults or 14.2.2 CIM/CIU 250
Modbus GSM/GPRS communication faults.
13.13 Stopping the E-pump
This section shows how to stop the E-pump.
In the example, slave address 0x01 is used.
Set the ControlRegister to the following values:
Hence the value to set is 0b0000000000000001 = 0x0001.
Request from master to slave
Example of response from slave to master
If there is no response from the slave, see section 14.1.2 CIM/
CIU 200 Modbus communication faults or 14.2.2 CIM/CIU 250
Modbus GSM/GPRS communication faults.
Field Value Description
Slave address 0x01 -
Function code 0x06 Write single register
Start address HI 0x00
ControlMode address
= 00102 (0x0066)
Start address LO 0x65
Value HI 0x00
New ControlMode value
= 1 (0x0001)
Value LO 0x01
Field Value Description
Slave address 0x01 -
Function code 0x06 Write single register
Start address HI 0x00
ControlMode address
= 00102 (0x0066)
Start address LO 0x65
Value HI 0x00
New ControlMode value
= 1 (0x0001)
Value LO 0x01
Bit 0: 1 (set the E-pump to remote mode)
Bit 1: 1 (start the E-pump)
Bit 2: 0 (do not send a reset fault command)
Bit 3: 0 (direction = clockwise rotation)
Bit 4: 0 (do not copy remote settings to local)
Bits 5-15: 0 (reserved values)
Field Value Description
Slave address 0x01 -
Function code 0x06 Write single register
Start address HI 0x00
ControlRegister address
= 00101 (0x0065)
Start address LO 0x64
Value HI 0x00
ControlRegister value
= 3 (0x0003)
Value LO 0x03
Field Value Description
Slave address 0x01 -
Function code 0x06 Write single register
Start address HI 0x00
ControlRegister address
= 00101 (0x0065)
Start address LO 0x64
Value HI 0x00
ControlRegister value
= 3 (0x0003)
Value LO 0x03
Bit 0: 1 (set the E-pump to remote mode)
Bit 1: 0 (stop the E-pump)
Bit 2: 0 (do not send a reset fault command)
Bit 3: 0 (direction = clockwise rotation)
Bit 4: 0 (do not copy remote settings to local)
Bits 5-15: 0 (reserved values)
Field Value Description
Slave address 0x01 -
Function code 0x06 Write single register
Start address HI 0x00
ControlRegister address
= 00101 (0x0065)
Start address LO 0x64
Value HI 0x00
ControlRegister value
= 1 (0x0001)
Value LO 0x01
Field Value Description
Slave address 0x01 -
Function code 0x06 Write single register
Start address HI 0x00
ControlRegister address
= 00101 (0x0065)
Start address LO 0x64
Value HI 0x00
ControlRegister value
= 1 (0x0001)
Value LO 0x01

Grundfos CIU 501 Specifications

General

Brand	Grundfos
Model	CIU 501
Category	Controller
Language	English