Grundfos CIU 202, Functional Profile And User Manual

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English (GB)
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13.7 Diagnostics register interpretation
The diagnostics register is interpreted as follows:
A bit value of 1 means true, unless otherwise specified. The
diagnostics register is read using function code 0x08 and
subcode 0x02.
13.8 Diagnostics: Return query data
This function is useful to ensure that the communication path and
slave configuration are correct. It will echo the request in the
response.
In the example, slave address 0x01 is used.
Request from master to slave
Example of response from slave to master
If there is no response from the slave, see section
14. Fault
finding
.
13.9 Reading the CIM configuration register block
This section shows how to read the first four registers of the CIM
configuration register block.
In the example, slave address 0x01 is used.
Request from master to slave
Example of response from slave to master
If there is no response from the slave, see section
14. Fault
finding
.
13.10 Reading the pit water level
This section shows how to read and interpret the water level of
the pit. In the example, slave address 0x01 is used.
Request from master to slave
Example of response from slave to master
A pit water level value of 220 [0.01 m] equals a water level of 2.20
metres.
If there is no response from the slave, see section
14. Fault
finding
.
Bit Description
0 Communication failure with the Grundfos product.
1
EEPROM self-test failed. The test is carried out when
system is booted.
2 Grundfos product not supported.
3
Modbus address offset is different from default value, i.e.
it differs from 0.
4
Using software-defined Modbus transmission speed
(Modbus RTU only).
5 RESERVED
6 RESERVED
7 RESERVED
8 RESERVED
9 RESERVED
10 RESERVED
11 RESERVED
12 RESERVED
13 RESERVED
14 RESERVED
15 RESERVED
Field Value Description
Slave address 0x01 -
Function code 0x08 Diagnostics
Subcode 0x00 Echo request
Data 0xAB Test data
Data 0xCD Test data
Field Value Description
Slave address 0x01 -
Function code 0x08 Diagnostics
Subcode 0x00 Echo request
Data 0xAB Test data
Data 0xCD Test data
Field Value Description
Slave address 0x01 -
Function code 0x04 Read input registers
Start address HI 0x00
Start address: 0x0001
Start address LO 0x00
Quantity HI 0x00
Number of registers:
0x0004
Quantity LO 0x04
Field Value Description
Slave address 0x01 -
Function code 0x04 Read input registers
Byte count 0x08 8 bytes follow
00001 HI 0x00
SlaveMinimumReplyDelay
: 0x000A
00001 LO 0x0A
00002 HI 0x00
RegisterOffset: 0x0000
00002 LO 0x00
00003 HI 0x00
Reserved value:
0x0000
00003 LO 0x00
00004 HI 0x00
SoftwareDefinedBitRate:
0x0004
00004 LO 0x04
Field Value Description
Slave address 0x01 -
Function code 0x04 Read input registers
Start address HI 0x01
Start address
(00301):0x012D
Start address LO 0x2C
Quantity HI 0x00
Number of registers:
0x0001
Quantity LO 0x01
Field Value Description
Slave address 0x01 -
Function code 0x04 Read input registers
Byte count 0x02 2 bytes follow
00301 HI 0x00
Pit water level:
0x00DC (220)
00301 LO 0xDC