© 2016 ROTRONIC AG 2 / 20
Table of contents
1 Introduction ............................................................................................................................ 3
2 Document description ............................................................................................................ 3
3 System overview .................................................................................................................... 3
3.1 Hardware Interface ......................................................................................................... 3
3.2 RS‐485 Slave Address, Baud rate, Data format ................................................................ 3
3.3 About Modbus (ref PI–MBUS–300) ................................................................................. 3
4 Holding registers .................................................................................................................... 4
4.1 Measurement Engineering (ex: ModScan) ....................................................................... 4
4.2 Output configuration (ex: ModScan) ................................................................................ 4
4.3 Application Engineering (ex: ModScan) ........................................................................... 6
4.4 Additional engineering ..................................................................................................... 7
4.5 Command Table of Factory Command ............................................................................ 7
4.6 Interpolation Engineering (ex: ModScan) ......................................................................... 8
4.7 Software engineering ...................................................................................................... 9
5 Device specific actions ......................................................................................................... 11
5.1 Read Flow Velocity [m/s] IEEE 754 ................................................................................ 11
5.2 Read Flow Velocity [m/s] 32‐bit Integer .......................................................................... 12
5.3 Read Serial No. ............................................................................................................. 13
5.4 Read Firmware Version ................................................................................................. 14
5.5 Disable Protection of Read Only Registers ..................................................................... 15
5.6 Clean Interpolation Points .............................................................................................. 16
5.7 Add Interpolation Points ................................................................................................. 17
5.8 Set Velocity Offset ......................................................................................................... 18
5.9 Set Temperature Offset .................................................................................................. 19
6 Document Version ............................................................................................................... 20
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