ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 61)

MVI56E-MCM ♦ ControlLogix Platform Configuration as a Modbus Slave
Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 61 of 199
June 18, 2014
3.2.2 Customizing the Memory Map
In some cases, the above memory map will not work for the application.
Sometimes a Master must read bits starting at address 0001, and also read a
register starting at 40001. With the memory map in this Modbus Memory Map
(page 59), this is not possible, as W
RITE D ATA [0] is seen as both 0001 to 0016,
and 40001. To accommodate this, you can customize the starting location within
the module for each device using the parameters shown below.
Parameter Value Description
BitInOffset 0 Defines the starting address within the module for 1xxxx
Modbus addressing. A value of 0 sets 10001 to 10016 as
address 0 in the MVI56E-MCM module.
WordInOffset 10 Defines the starting address within the module memory for
3xxxx registers.
OutOffset 1000 Defines the starting address within the module for 0xxx coils.
HoldOffset 1010 Defines the starting address within the module for 4xxxx
addressing.
Based on the configuration described above for the ModDef section of the
module and the values specified for the offset parameters, below is the Modbus
addressing map for the module.
MVI Address 0xxx 1xxxx 3xxxx 4xxxx Tag Address
0 10001 to 10016 WriteData[0]
1 10017 to 10032 WriteData[1]
9 10145 to 10160 WriteData[9]
10 10161 to 10176 30001 WriteData[10]
11 10177 to 10192 30002 WriteData[11]
100 11601 to 11616 30091 WriteData[100]
200 13201 to 13216 30191 WriteData[200]
500 18001 to 18016 30491 WriteData[500]
598 19569 to 19584 30489 WriteData[598]
599 19585 to 19600 30490 WriteData[599]
600 to 999 N/A N/A N/A N/A Reserved
1000 0001 to 0016 ReadData[0]
1001 0017 to 0032 ReadData[1]
1009 0145 to 0160 ReadData[9]
1010 0161 to 0176 40001 ReadData[10]
1011 0177 to 0192 40002 ReadData[11]
1050 0801 to 0816 40041 ReadData[50]