Onicon FT-3200 - Section 2.0 Modbus; Modbus Register Types and Data Forms; Memory Map

FT-3200 MODBUS TCP/IP SUPPLEMENT
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ONICON FT-3200 Inline Electromagnetic Flow Meters provide ow rate data, totalized ow data, and operating status data
via the MODBUS RTU TCP/IP serial communications interface. MODBUS data is available in the same engineering units
shown on the meter’s display.
2.1 MODBUS REGISTER TYPES AND DATA FORMS
• Input registers are used for all process data. All data is formatted MSB → LSB (Big Endian).
• A single coil is provided for resetting totals.
Function Codes Supported
SECTION 2.0 MODBUS
Function Code Description
04 Read multiple input registers
05 Write a single coil
08 Diagnostics
Important Note
Register addresses are shown in Base 1 format. Address 0001 corresponds to memory location 0000.
Rate / Velocity Data
Data transmitted in the same engineering units shown on the transmitter display.
2.2 MEMORY MAP
Function
Code
Address Description Data Format Comment
04 0001 Full scale ow rate (1 of 2) Float (32-bit) *Full scale ow rate setting (FS1)
04 0002 Full scale ow rate (2 of 2) Float (32-bit)
04 0003 Flow rate as % full scale (1 of 2) Float (32-bit) % of ow rate setting in register 0001-0002
04 0004 Flow rate as % full scale (2 of 2) Float (32-bit)
04 0005 Flow rate (1 of 2) Float (32-bit) Average ow rate. See 0022
04 0006 Flow rate (2 of 2) Float (32-bit)
04 0007 Flow velocity (1 of 2) Float (32-bit) Velocity in ft/s or m/s
04 0008 Flow velocity (2 of 2) Float (32-bit)
*This is FS1 the full scale ow limit setting programmed into the transmitter. It is used for setting the Full Scale Freq
Output (Frq1), alarm thresholds and other operating limits. FS1 and A1S (Full Scale Analog Output) are set to the same
value at the factory during initial conguration.
Caution
Changing the A1S (Full Scale Analog Output) value in the eld will not change the FS1 value reported over
the network.