Tecfluid MX4B Manual de usuario

Communication protocols for MX4B and MX4H converters Instructions manual R-MI-MX4COM Rev.: 0 English version

10 6 EXAMPLES NOTE: In all examples, where said CRC refers to “Cyclic redundancy check”, that is an error detecting code sent at the end of each fra

11 The slave responds after more than 3.5 characters, indicating its identification, the requested function code, the number of data bytes to be sent

12 Example 4. Writing totalizer units. Master requests slave number 0x01 (MX4B converter) to write the corresponding code to totalizer units. The val

13 The received code in the example is 0x0007 that corresponds to l/h. 7 ELECTRICAL CONNECTION For the electrical connection, the MX4 converter has t

14 In some cases in which several devices are connected in a line it is necessary to incorporate an impedance at the end. If the converter MX4B is th

15 8 CONVERTER PROGRAMMING Turn on the converter and press (Enter) With the keys (Down / Left) and (Up), select Programming, and then validate with t

16 8.2 Baud rate It determines the data transmission speed. All the devices in the bus have to be configured with the same baud rate. 8.1 Slave addre

17 01 87 01 7A 0B Slave ID (MX4B) Function * Error code CRC 8.5 Timeout It is the minimum time between frames. Default value is 20 ms. In this scr

18 HART 1 INTRODUCTION HART is a bi-directional communication protocol that provides data access between intelligent field instruments and host syst

19 3.1 Current loop connection Terminal 12 mA (+) 13 mA (-) The mA output is galvanically isolated. NOTE: The analog output incorporates a pr

2 Thank you for choosing the MX4 converter from Tecfluid S.A. This instruction manual allows the connection, commissioning and operation of the MX4 c

20 Number Classification Name Units code 0 66 Flow rate 16, 17, 18, 19, 22, 24, 28, 30, 131, 136, 137, 138 1 68 Totalized volume 40, 41, 42, 43 4 V

21 Byte Bit Meaning Class Field Device Status bits set 0x01 This bit is set when a configuration data error is detected on a cold start or reset

22 Number Command 33 Read Device Variables 34 Write Primary Variable Range Values 35 Write Primary variable Damping Values 38 Reset Configuration

23 Manufacturer, Model and Revision Tecfluid S.A., converter MX4H, Rev. 0 Device type Transmitter HART revisión 6.0 Device Description available

24 WARRANTY Tecfluid S.A. guarantees all the products for a period of 24 months from their sale, against all faulty materials, manufacturing or perfo

3 TABLE OF CONTENTS MODBUS 1 INTRODUCTION ... 5 2 MODBUS DATA

4 HART 1 INTRODUCTION ... 18 2 DEVICE IDENTIFICATION ...

5 MODBUS 1 INTRODUCTION Modbus is a communication protocol commonly used to connect industrial electronic devices. It is based in a master-slave ar

6 Holding Registers (Read write) 4.2 Register addresses The addresses for the different data are the following: Input Registers (Read only) Access (H

7 5 DEVICE DATA ACCESS NOTE: The floating point data use two registers. It is recommended to access them with an unique message instead of two conse

8 5.4 Flow rate 20 mA Description: Flow rate end of scale of analog output. Flow rate 20 mA contains the numerical value of the flow rate correspon

9 5.7 Filter Description: Contains the integration time value between 0 and 40 s. Supported functions: Read Holding Registers. (0x03h) Write Si