Tecfluid MX4B User Manual
Page 3
3
TABLE
OF
CONTENTS
MODBUS
1
INTRODUCTION ...................................................................................
5
2
MODBUS DATA MODEL .......................................................................
5
3
MODBUS FUNCTIONS .........................................................................
5
3.1
Function “Read Input Registers” ...........................................
5
3.2
Function “Read Holding Registers” .......................................
5
3.3
Function “Write Single Register” ...........................................
5
3.4
Function “Write Multiple Registers” .......................................
5
4
MODBUS IN MX4B CONVERTER .......................................................
5
4.1
Data access ..............................................................................
5
4.2
Register adresses ....................................................................
6
5
DEVICE DATA ACCESS ......................................................................
7
5.1
Flow rate ...................................................................................
7
5.2
Total ...........................................................................................
7
5.3
Flow rate 4 mA ..........................................................................
7
5.4
Flow rate 20 mA .........................................................................
8
5.5
Totalizer units ...........................................................................
8
5.6
Flow rate units ...........................................................................
8
5.7
Filter .......................................................................................
9
5.8
Status .........................................................................................
9
6 EXAMPLES
...........................................................................................
10
7
ELECTRICAL CONNECTION ............................................................... 13
8
CONVERTER PROGRAMMING ........................................................... 15
8.1
Slave address ........................................................................... 16
8.2
Baud rate ...................................................................................
16
8.3
Parity
.......................................................................................
16
8.4
Stop bits ..................................................................................... 16
8.5
Timeout ..................................................................................... 17
9
ERRORS ............................................................................................... 17