User Guide

FS-8704-16 Omron FINS Manual Page 12 of 37
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4.1.5. Map Descriptor Example 2 – IO Write
This example is used to write a value(s) to the PLC. The write is done when the contents of the Data Array are updated
(written to by a remote device.). In the previous example, it was shown how a ‘read’ Map Descriptor can also be used to
write by using FIeldServer’s Write-Through technology.
Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, Node_name Address, Length, Data_type, Command_Name, Unit_Number
CMD_CIOw, DA_CIOw, 0, WRBX, PLC1, 0, 20, CIO-WORD, MEMORY AREA WRITE, 0
One of the Data
Arrays declared in
the Data_Array
section (See section
1.05)
The Data in this
Data Array will be
written to the PLC1.
Driver will
fetch
consecutive 20
(Length)
elements
starting from
this offset to be
written at Node
PLC1
Forcing the Driver to issue a
write request upon updating
this dedicated portion of Data
Array. In this case first 20
elements comes under
dedicated portion for this map
descriptor.
Note : If WRBC , It will Force
the Driver to issue a write
request for each Scan_Interval
In this particular case Driver
will write this portion of CIO
memory area for each second.
Specify the
number of
elements
(number of
Words in this
case) to read
from PLC.
Specifies the type
of target memory
at PLC.
Also this
parameter can be
replaced with
Memory_Code
parameter.
See Appendix A
to for memory
codes read CIO
Word area.
Command Name
specifies the
Main and Sub
request codes to
make a request to
write this
memory from
PLC.
Assigning Direct
MRC and SRC
parameters can
replace this
parameter.
See Appendix A
to know valid
MRC –SRC
values to read
this CIO memory
area.
Unit
number at
PLC
(Keep
mostly
zero, or
undefined
keep it
zero)