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5.2.2
Modbus RTU
EE741 flow sensor can be operated in a Modbus RTU network with max. 32 devices. Writing 0
into the corresponding register will reset the MIN/MAX values and the consumption meter.
For Modbus protocol settings see Application Note Modbus AN0103 (www.epluse.com/EE741).
Modbus Map:
Register number
[DEC]
Read registers (function code 0x03 / 0x04)
30501
30503
30507
30509
30511
30513
30517
30519
30521
30523
30525
30529
30533
31001
31003
31007
31009
31011
31013
31017
31019
31021
31023
31025
31501
31503
31507
31509
31511
31513
31517
31519
31521
31523
31525
Write registers (function code 0x06)
60001
60002
60003
60004
60005
60006
60007
60008
60009
1) Register number starts from 1
2) Register address starts from 0
Modbus setup:
Baud rate
Data bits
Parity
Stop bits
Slave address
User Manual EE741 Inline Flow Sensor for Compressed Air and Gases
Register address
Measured value
1)
2)
[HEX]
1F4
Temperature
1F6
Temperature
1FA
Standard flow
1FC
Standard flow
1FE
Mass flow
200
Mass flow
204
Standard volume flow
206
Standard volume flow
208
Standard volume flow
20A
Standard volume flow
20C
Standard volume flow
210
Consumption meter status
214
Consumption meter status
3E8
MIN value temperature
3EA
MIN value temperature
3EE
MIN value standard flow
3F0
MIN value standard flow
3F2
MIN value mass flow
3F4
MIN value mass flow
3F8
MIN value standard volume flow
3FA
MIN value standard volume flow
3FC
MIN value standard volume flow
3FE
MIN value standard volume flow
400
MIN value standard volume flow
5DC
MAX value temperature
5DE
MAX value temperature
5E2
MAX value standard flow
5E4
MAX value standard flow
5E6
MAX value mass flow
5E8
MAX value mass flow
5EC
MAX value standard volume flow
5EE
MAX value standard volume flow
5F0
MAX value standard volume flow
5F2
MAX value standard volume flow
5F4
MAX value standard volume flow
0
Reset MIN value temperature
1
Reset MIN value standard flow
2
Reset MIN value mass flow
3
Reset MIN value standard volume flow
4
Reset MAX value temperature
5
Reset MAX value standard flow
6
Reset MAX value mass flow
7
Reset MAX value standard volume flow
8
Reset consumption meter
Factory settings
9600
8
EVEN
1
240
Unit
Type
°C
32-bit float
°F
32-bit float
Nm/s
32-bit float
SFPM
32-bit float
kg/h
32-bit float
kg/min
32-bit float
Nm³/h
32-bit float
Nm³/min
32-bit float
l/min
32-bit float
l/s
32-bit float
SCFM
32-bit float
m³
64-bit-double
ft³
64-bit-double
°C
32-bit float
°F
32-bit float
Nm/s
32-bit float
SFPM
32-bit float
kg/h
32-bit float
kg/min
32-bit float
Nm³/h
32-bit float
Nm³/min
32-bit float
l/min
32-bit float
l/s
32-bit float
SCFM
32-bit float
°C
32-bit float
°F
32-bit float
Nm/s
32-bit float
SFPM
32-bit float
kg/h
32-bit float
kg/min
32-bit float
Nm³/h
32-bit float
Nm³/min
32-bit float
l/min
32-bit float
l/s
32-bit float
SCFM
32-bit float
16-bit integer
16-bit integer
16-bit integer
16-bit integer
16-bit integer
16-bit integer
16-bit integer
16-bit integer
16-bit integer
Adjustable values
9600, 19200, 38400
8
None, odd, even
1 or 2
1...247
17
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