MVI56E-MNETC/MNETCXT ♦ ControlLogix Platform MVI56E-MNETC/MNETCXT Configuration
Modbus TCP/IP Client Enhanced Communication Module - Client/Server User Manual
ProSoft Technology, Inc. Page 37 of 172
September 20, 2018
Read Register Start
0 to 9999
The Read Register Start parameter specifies the start of the Read Data area in
module memory. Data in this area will be transferred from the module to the
processor.
The total user database memory space is limited to the first 10,000 registers of
module memory, addresses 0 through 9999. Therefore, the practical limit for this
parameter is 9999 minus the value entered for Read Register Count, so that the
Read Data Area does not try to extend above address 9999. Read Data and
Write Data Areas must be configured to occupy separate address ranges in
module memory and should not be allowed to overlap.
Note: To take advantage of the new features described above, your MVI56E-
MNETC/MNETCXT module needs to have firmware version 3.01 or higher, and
your MVI56E-MNETC/MNETCXT Add-On Instruction needs to be version 1.8 or
higher. Earlier versions have no server capabilities and support only up to 5000
user database registers.
Read Register Count
0 to 10000
The Read Register Count parameter specifies the size of the Read Data area of
module memory and the number of registers to transfer from this area to the
processor, up to a maximum of 10,000 words.
Note: Total Read Register Count and Write Register Count cannot exceed 10,000 total registers.
Read Data and Write Data Areas must be configured to occupy separate address ranges in
module memory and should not be allowed to overlap.
Write Register Start
0 to 9999
The Write Register Start parameter specifies the start of the Write Data area in
module memory. Data in this area will be transferred in from the processor.
Note: Total user database memory space is limited to the first 10,000 registers of module memory,
addresses 0 through 9999. Therefore, the practical limit for this parameter is 9999 minus the value
entered for Write Register Count, so that the Write Data Area does not try to extend above address
9999. Read Data and Write Data Areas must be configured to occupy separate address ranges in
module memory and should not be allowed to overlap.
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