ProSoft Technology InRax MVI71-DNPSNET, User Manual

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MVI71-DNPSNET ♦ PLC Platform Reference
Distributed Network Protocol Interface Module
Page 60 of 100 ProSoft Technology, Inc.
September 22, 2008
n is the number of read data files minus one. Each file contains up to 1000
words.
m is the number of write data files minus one. Each file contains up to 1000
words.
The number of read and write files are dependent on the modules configuration.
Two examples follow:
Example of 240 words of read and write data (cfg file=10)
Data Files Description
N11:0 to 239 Read data
N12:0 to 239 Write data
Example of 2300 read and 3500 write data registers (cfg file=10)
Data Files Description
N11:0 to 999 Read data words 0 to 999
N12:0 to 999 Read data words 1000 to 1999
N13:0 to 299 Read data words 2000 to 2299
N14:0 to 999 Write data words 0 to 999
N15:0 to 999 Write data words 1000 to 1999
N16:0 to 999 Write data words 2000 to 2999
N17:0 to 499 Write data words 3000 to 3499
Command control is also supported on the side-connect interface. A reserved
data area in the first user data file for the interface in the PLC is utilized for this
function. Starting at register 50 in the file and extending for 64 registers is the
location of the data area. The format for the control blocks is identical to that
described in the previous sections. The only difference is in the response blocks
from the module. Register 50 will be set to zero when the function is complete
and register 51 will contain the command control code requested. The BTW
block identification code is not included and the data shown starting at word 2 is
contained in registers 52 to 113.