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3
2. Modbus register mapping
2.1 CIU 251 register blocks
2.2 IO 270 registers
Register
Description
Module/device
00001
CIM configuration
Related to the CIM module
00021
CIM status
00030
GENIpro device family/type/version
00101
Device control
Device data area of the connected Grundfos product
00201
Device status
00301
Device data
00701
Device alarm simulation
00801
Name register area
Not supported by all products
01001
GENIpro request telegram
Reserved for GENIpro communication via Modbus
01101
GENIpro reply telegram
01201
IO 270 control
Related to the IO 270 module related
(covered by this manual)
01211
IO 270 status
01221
IO 270 data
Address
Modbus name
Scale
Modbus description
Control
1201
IO270_SetAnalogOutput
0.1 %
Control of analog output value
(Value change triggered)
01202
IO270_SetRelayOutput
Bool
Control of output relay
(Value change triggered)
Bit
Description
0
0 = Open relay, 1 = Closed relay
01203
IO270_LevelShiftCountControl
Bits
Reset of digital input shift counters and level duration counters
(Rising edge triggered).
Bit
Description
0
0 = No action, 1 = Clear DI1 duration counters
1
0 = No action, 1 = Clear DI1 shift counter
2
0 = No action, 1 = Clear DI2 duration counters
3
0 = No action, 1 = Clear DI2 shift counter
4
0 = No action, 1 = Clear DI3 duration counters
5
0 = No action, 1 = Clear DI3 shift counter
6
0 = No action, 1 = Clear DI4 duration counters
7
0 = No action, 1 = Clear DI4 shift counter
Status
01211
IO270_AnalogIn1Fault
Bits
Sensor faults, analog input 1
Bit
Description
0
0 = No fault, 1 = Signal current too high (> 20 mA)
1
0 = No fault, 1 = Signal current too low (< 4 mA)
2
0 = No fault, 1 = Signal voltage too high
3
0 = No fault, 1 = Sensor power supply fault
01212
IO270_AnalogIn2Fault
Bits
Sensor faults, analog input 2
Bit
Description
0
0 = No fault, 1 = Signal current too high (> 20 mA)
1
0 = No fault, 1 = Signal current too low (< 4 mA)
2
0 = No fault, 1 = Signal voltage too high
3
0 = No fault, 1 = Sensor power supply fault
01213
IO270_TempInStatus
Bits
Sensor faults, temperature
Bit
Description
0
0 = No fault, 1 = No sensor
1
0 = No fault, 1 = Short-circuit
2
0 = No fault, 1 = PT1000 sensor connected
3
0 = No fault, 1 = PT100 sensor connected
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