Onicon F-3100 MOD Manuel d'utilisateur télécharger pdf (Page 10)

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F-3100-MOD Flow Meter Network Interface Installation Guide 05/14 - 0725-1 Page 10

SECTION 2.0: MODBUS MEMORY MAP

ONICON F-3100 Inline Electromagnetic Flow Meters provide ow rate data, totalized ow data, and

operating status data via the MODBUS RTU RS485 serial communications interface. MODBUS data is

available in the same engineering units shown on the meter’s display.

2.1 MODBUS REGISTER FORMAT AND NETWORKING INFORMATION

All registers are 16 bit MODBUS Holding Registers.

Only one MODBUS function code is supported. It is function code 3, reading holding registers.

Floating point data conforms to IEEE754 format.

Long integer (32-bit) data is formatted with the high order word (MSW) on the even addrss and

the low order word (LSW) on the odd address.

Address

Description Register Type Comment

001 Flow rate as a % of full scale Floating Point (1 of 2)

002 Flow rate as a % of full scale Floating Point (2 of 2)

003 Current ow rate Floating Point (1 of 2)

004 Current ow rate Floating Point (2 of 2)

005 Positive ow total Scaled Long Integer (1 of 2) Register values must be

scaled according to the

number of decimal points

shown on the ow meter

display.

Example:

Displayed value - 226.794

Scale multiplier - 0.001

006 Positive ow total Scaled Long Integer (2 of 2)

007 Partial positive ow total Scaled Long Integer (1 of 2)

008 Partial positive ow total Scaled Long Integer (2 of 2)

009 Negative ow total Scaled Long Integer (1 of 2)

010 Negative ow total Scaled Long Integer (2 of 2)

011 Partial negative ow total Scaled Long Integer (1 of 2)

012 Partial negative ow total Scaled Long Integer (2 of 2)

013 Run time clock in seconds Long Integer (1 of 2)

014 Run time clock in seconds Long Integer (2 of 2)

1 2 ... 5 6 7 8 9 10 11 12

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Onicon F-3100 MOD Manuel d'utilisateur Page 10