FieldServer Omron FINS FS-8704-16 - Manual (Page 14)

FS-8704-16 Omron FINS Manual Page 14 of 38
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4.5.5 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
4.1)
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)