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GF Piping Systems
Modbus Supplement to the
operating instructions
GF U3000 V2 Ultrasonic Flowmeter
GF U3000 V2 HM Ultrasonic Heatmeter
2026161 F U3000 V2 Modbus Supplement
MA_00138 / EN / 00 (07.2022)
© Georg Fischer Piping Systems Ltd
CH-8201 Schaffhausen/Switzerland
+41 52 631 30 26/info.ps@georgfischer.com
www.gfps.com
Serial
#
V 02.07.002
02.07.001
007975
Press
to start
7
8
9
Units
Flow
Energy
4
5
6
Velocity
Off
On
1
2
3
Logger
System
Outputs
04.00.000
Delete
+ / -
Diags
•
0
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Table of Contents
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Summary of Contents for GF U3000 V2
- Page 1 GF Piping Systems Modbus Supplement to the operating instructions GF U3000 V2 Ultrasonic Flowmeter GF U3000 V2 HM Ultrasonic Heatmeter Serial V 02.07.002 02.07.001 04.00.000 007975 Press to start Delete Units Flow Energy + / - Diags Velocity • Logger...
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Page 2: Table Of Contents
Modbus Supplement to the operating instructions GF U3000 V2 Ultrasonic Flowmeter Table of Contents Intended use MODBUS CONNECTIONS MODBUS CONFIGURATION Supported Messages The Register Map. Reading Registers Writing Updateable Registers General Procedure for Updating Unit Settings Some Examples Diagnostics Read Device Identification... -
Page 3: Intended Use
It is recommended to run cable containing 4 wires and a shield to each GF U3000 V2 Ultrasonic Flowmeter from a network junction box. This accommodates one pair of twisted wires into the con- nected unit, and one set out to connect to the next unit. -
Page 4: Modbus Configuration
If parity is not used, then two stop bits must be specified. In addition to the standard frame format, non- standard 10-bit frames are also supported. In this case the GF U3000 V2 Ultrasonic Flowmeter will issue warnings but not prohibit the use of these formats. -
Page 5: Supported Messages
Modbus addresses may be between 1 and 247. While some GF U3000 V2 Ultrasonic Flowmeter parameters are configurable via a management system, GF U3000 V2 Ultrasonic Flowmeter local mode takes precedence. To stop a management system changing configuration while operating in local mode, set Block All Remote Changes, or Block Remote Total Changes as appropriate, in the Modbus Setup menu. -
Page 6: The Register Map
The Register Map. A GF U3000 V2 Ultrasonic Flowmeter Modbus register is depicted in Figure 3. A few points need to be noted. The interpretation of Modbus registers or register sets is important. All data is in BIG ENDIAN format. In BIG ENDIAN format the most significant portion of a number is stored in the lower addresses. - Page 7 Modbus Supplement to the operating instructions The management system programmer may choose to use the Time and Date associated with the GF U3000 V2 Ultrasonic Flowmeter, or use the Time and Date associated with their system time by simply reading a block of registers starting at either offset 100 or offset 104.
- Page 8 Modbus Supplement to the operating instructions GF U3000 V2 Ultrasonic Flowmeter Online:1 Device is reading flow Urgent Error:1 An urgent error has been reported Remote Total Changes Instrument has barred updates of all Instru- Disabled:1 totals. 1=MBM changes disabled ment...
- Page 9 GF U3000 V2 Ultrasonic Flowmeter Modbus Supplement to the operating instructions Flow Side ×100 ⁰C, ⁰F Tempera- sint16 e.g., 7557 = 75.57 ⁰C or ⁰F Metric, Imperial ture Return Side sint16 ×100 ⁰C, ⁰F Metric, Imperial Tempera- e.g., 3770 = 37.7 ⁰C or ⁰F...
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Page 10: Reading Registers
Modbus Supplement to the operating instructions GF U3000 V2 Ultrasonic Flowmeter Reading Registers Registers may be read singularly or in blocks. It should be noted that registers are updated once every second in an atomic operati- on. In this way this register set can be considered a single data point. It should be obvious that reading multiple single registers cannot ensure that the data returned is from the same data set. -
Page 11: General Procedure For Updating Unit Settings
GF U3000 V2 Ultrasonic Flowmeter Modbus Supplement to the operating instructions Regime Property Metric1 Imperial US Imperial Metric2 Velocity ft/s ft/s Volumetric Flow gallons/s US gallons/s Volume litres gallons US gallons Energy Power BTU/sec BTU/sec Acceleration ft/sec ft/sec All other updateable registers can be set by either the unit, or by the MBM. A simple example are the Totals registers. In normal operation they are updated and may be read by the MBM, but they may also be used to rest the totals using the procedure outlined in the ensuing paragraphs. -
Page 12: Some Examples
Modbus Supplement to the operating instructions GF U3000 V2 Ultrasonic Flowmeter The general procedure for updating a unit’s setting by the MBM follows the steps below: Set the “Lock-out Updates” flag as mentioned earlier. Perform write operations as necessary and set respective update flags. -
Page 13: Diagnostics
GF U3000 V2 Ultrasonic Flowmeter Modbus Supplement to the operating instructions 3.6.3 Changing the Damping Time, Mode and Dynamic Damping Threshold In this example we will set the Fixed damping time to 20 seconds, change the damping mode to Dynamic and change the Dynamic Damping Acceleration Threshold to 0.25 m/s2. -
Page 14: Status Flags
An urgent error has been reported. This can be useful to indicate that a Status Flags Urgent Error serious error has occurred in the unit. For a list of urgent errors see the GF U3000 V2 Ultrasonic Flowmeter manual. Status Flags... - Page 15 GF U3000 V2 Ultrasonic Flowmeter Modbus Supplement to the operating instructions...
- Page 16 GF Piping Systems Worldwide at home Our sales companies and representatives ensure local customer support in more than 100 countries. www.gfps.com Argentina / Southern South America France Mexico / Northern Latin America Singapore Georg Fischer Central Plastics Sudamérica S.R.L. Georg Fischer SAS Georg Fischer S.A.
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