E+E Elektronik EE741 Series, User Manual

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