Modbus Settings - ADC Example Mapping

For this application example, ModbusTCP communication requires the following:1,008 bits (read)

  • 1,008 bits (coil)

  • 1,000 words (read)

  • 1,000 words (hold)

Step Action
1 Choose the direct memory area in the LS PLC. In this example, the M memory area will be used. The user can choose the W area or a combination of both.
2

Determine the blocks of registers that will be used.

  • 1,008 bits (read) è %MX3216 - %MX4223

  • 1,008 bits (coil) è%MX6416 - %MX7423

  • 1000 words (read)è %MW600 - %MW1599

  • 1000 words (hold) è %MW1600 - %MW2599
3

Enter the starting registers of each Modbus area (red above) in the Modbus Settings window.

Note: Bit area must use Bit data type address.

Select OK. Mapping will be as the chart indicates.

Tip:

C-More Modbus settings are added from the Function tab è Panel Manager.

XEM PLC
Description		 Direct Address Tags XG5000 Example Variable XG5000 Data Type Modbus Register C-More Tag C-More Tag Data Type
Bit Read Area Address %MX3216 BOOL_TO_HMI BOOL 10001 BOOL_FROM_PLC Discrete
Bit Write Area Address %MX6416 BOOL_FROM_HMI BOOL 00001 BOOL_TO_PLC Discrete
Word Read Area %MW600 INT_TO_HMI INT 30001 INT_FROM_PLC Signed Int 16
Word Read Area %MW601 UINT_TO_HMI UINT 30002 UINT_FROM_PLC Unsigned Int 16
Word Read Area %MD304 DINT_TO_HMI DINT 30009 DINT_FROM_PLC Signed Int 32
Word Read Area %MD305 UDINT_TO_HMI UDINT 30011 UDINT_FROM_PLC Unsigned Int 32
Word Read Area %MD306 REAL_TO_HMI REAL 30013 REAL_FROM_PLC Floating PT 32
Word Write Area %MW1600 INT_FROM_HMI INT 40001 INT_TO_PLC Signed Int 16
Word Write Area %MW1601 UINT_FROM_HMI UINT 40002 INT_TO_PLC Unsigned Int 16
Word Write Area %MD804 DINT_FROM_HMI DINT 40009 DINT_TO_PLC Signed Int 32
Word Write Area %MD805 UDINT_FROM_HMI UDINT 40011 UDINT_TO_PLC Unsigned Int 32
Word Write Area %MD807 REAL_FROM_HMI REAL 40013 REAL_TO_PLC Floating PT 32
Word Write Area %MW1602 WORD_FROM_HMI WORD 40003 WORD_TO_PLC Unsigned Int 16
Word Write Area %MW602 WORD_TO_HMI WORD 30003 WORD_FROM_PLC Unsigned Int 16
Word Write Area %MD807 DWORD_FROM_HMI DWORD 40015 DWORD_TO_PLC Unsigned Int 32
Word Write Area %MD307 DWORD_TO_HMI DWORD 30015 DWORD_FROM_PLC Unsigned Int 32
Word Write Area %MW1616 STRING_FROM_HMI STRING 40017 STRING_TO_PLC Ascii String
Word Write Area %MD308 STRING_TO_HMI STRING 30017 STRING_FROM_PLC Ascii String
Variable Kind Variable Type Address
VAR BOOL_FROM_HMI BOOL %MX6416
VAR BOOL_TO_HMI BOOL %MX3216
VAR DINT_FROM_HMI DINT %MD804
VAR DINT_TO_HMI DINT %MD304
VAR DWORD_FROM_HMI DWORD %MD307
VAR DWORD_TO_HMI DWORD %MD807
VAR INT_FROM_HMI INT %MW1600
VAR INT_TO_HMI INT %MW600
VAR REAL_FROM_HMI REAL %MD806
VAR REAL_TO_HMI REAL %MD306
VAR STRING_FROM_HMI STRING %MW1616
VAR STRING_TO_HMI STRING %MD308
VAR UDINT_FROM_HMI UDINT %MD805
VAR UDINT_TO_HMI UDINT %MD305
VAR UNIT_FROM_HMI UNIT %MW1601
VAR UNIT_TO_HMI UNIT %MW601
VAR WORD_FROM_HMI WORD %MW602
VAR WORD_TO_HMI WORD %MW1602
Device Name Tag Name Data Type Address Data Count
DEV002 BOOL_FROM_PLC Discrete 10001  
DEV002 BOOL_TO_PLC Discrete 000001  
DEV002 DINT_FROM_PLC Signed Int 32 30009  
DEV002 DINT_TO_PLC Signed Int 32 40009  
DEV002 DWORD_FROM_PLC Unsigned Int 32 30015  
DEV002 DWORD_TO_PLC Unsigned Int 32 50015  
DEV002 INT_FROM_PLC Signed Int 16 30001  
DEV002 INT_TO_PLC Signed Int 16 40001  
DEV002 REAL_FROM_PLC Floating PT 32 30013  
DEV002 REAL_TO_PLC Floating PT 32 40013  
DEV002 STRING_FROM_PLC Ascii String 30017 32
DEV002 STRING_TO_PLC Ascii String 40017 32
DEV002 UDINT_FROM_PLC Unsigned Int 32 30011  
DEV002 UDINT_TO_PLC Unsigned Int 32 40011  
DEV002 UNIT_FROM_PLC Unsigned Int 16 30002  
DEV002 UNIT_TO_PLC Unsigned Int 16 40002  
DEV002 WORD_FROM_PLC Unsigned Int 16 30003  
DEV002 WORD_TO_PLC Unsigned Int 16 40003  

 

 

LP203-2