Flintec DAD 141.1 User Manual

Type DAD 141.1

Technical Manual Modbus Communication

Firmware Version 141.181.v.1.06 or higher

Hardware Version 141.10x.v.1.01

Document No. E223-1 Rev. 2.2 EN

DAD 141.1 Technical Manual Modbus Communication, Rev. 2.3 - Juni 2014 Page 1

1. How to use Modbus in DAD 141.1

1.1. Implemented functions for Modbus RTU and Modbus TCP.

 0x03 Read holding registers: Used for reading 16 or 32bit values.
 0x04 Read input registers: Same as above.
 0x06 Write single register: Used for writing 16bit values.
 0x10 Write multiple registers: Used for writing 32bit values.

1.2. Modbus RTU

 The baudrate must be set in menu 8.1.
 In multidrop or 2 wire applications the user must select "485" in menu 8.2 or "422" for

point to point 4 wire applications.

 A Modbus address between 1 and 247 must be set in menu 8.3.
 The parity used in the actual Modbus network must be selected in menu 8.7

(select no or o = odd or e = even).

 The Modbus RTU mode must be selected in menu 8.8 (select RTU).

1.3. Modbus Protocols

1.3.1. Modbus RTU via Serial Port

 binary data protocol

1.3.2. Modbus TCP via Ethernet Port:

 binary data protocol, embedded in TCP/IP packages
 Modbus TCP port: 502
 IP address is 192.168.0.100 (factory default)

1.4. Modbus Index Tables

See the following pages.

DAD 141.1 Technical Manual Modbus Communication, Rev. 2.3 - Juni 2014 Page 2

Index (hex)

Type

Size

Access

Function

2000

Float

2 R Gross Weight

This Index returns the latest Gross value obtained from a DAD141.
The format is IEEE754 Single precision floating point format. The 32 bit data is obtained by reading 2
16-bit registers from index 2000.
The Gross Weight are also sent when reading multiple DAD141 data at index 3500.
see also command description: GG get gros value

2002

Float

2 R Net Weight

This Index returns the latest Netto value obtained from a DAD141.
The format is IEEE754 Single precision floating point format. The 32 bit data is obtained by reading 2
16-bit registers from index 2002.
The Netto Weight are also sent when reading multiple DAD141 data at index 3500.
see also command description: GN get net value

2008

Float

2 R Average Weight

This Index returns the latest average weight value obtained from a DAD141.
The format is IEEE754 Single precision floating point format. The 32 bit data is obtained by reading 2
16-bit registers from index 2008.
see also command description: GA get average value

2020

Int32

2 R Gross Weight

This Index returns the Gross weight value obtained from a DAD141.
The 32 bit integer data is obtained by reading 2 16-bit registers from index 2020.
The Gross Weight are also sent when reading multiple DAD141 data at index 3300.
see also command description: GG get gros value

2022

Int32

2 R Net Weight

This Index returns the Netto weight value obtained from a DAD141.
The 32 bit integer data is obtained by reading 2 16-bit registers from index 2022.
The Netto Weight are also sent when reading multiple DAD141 data at index 3300.
see also command description: GN get net value

2028

Int32

2 R Average Weight

This Index returns the latest average weight value obtained from a DAD141.
The 32 bit integer data is obtained by reading 2 16-bit registers from index 2028.
see also command description: GA get average value

202A

Int32

2 R A/D Sample

This Index returns the current ADC value obtained from a DAD141.
The 32 bit integer data is obtained by reading 2 16-bit registers from index 202A.
see also command description: GS get sample

202C

Int32

2 R Device ID

This Index returns the current ID of a DAD141.
The 32 bit integer data is obtained by reading 2 16-bit registers from index 202C.
The the high word (202C) are 0(zero) and the low word (202D) should be split into two bytes:

1. Byte is the minor ID, normally 10h (16d).

2. Byte is the major ID, normally 14h (20d).
see also command description: ID identification device

DAD 141.1 Technical Manual Modbus Communication, Rev. 2.3 - Juni 2014 Page 3