FieldServer FS-8704-16 instruction manual Mrc -Src

FS-8704-16 Omron FINS Manual Page 12 of 37

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	Driver will	Forcing the Driver to issue a
Arrays declared in	fetch	write request upon updating
the Data_Array	consecutive 20	this dedicated portion of Data
section (See section	(Length)	Array. In this case first 20
1.05)	elements	elements comes under
The Data in this	starting from	dedicated portion for this map
Data Array will be	this offset to be	descriptor.
written to the PLC1.	written at Node	Note : If WRBC , It will Force
	PLC1
		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.

		Command Name
Specify the	Specifies the type	specifies the	Unit
number of	of target memory	Main and Sub	number at
elements	at PLC.	request codes to	PLC
(number of	Also this	make a request to	(Keep
Words in this	parameter can be	write this	mostly
case) to read	replaced with	memory from	zero, or
from PLC.	Memory_Code	PLC.	undefined
	parameter.	Assigning Direct	keep it
	See Appendix A	MRC and SRC	zero)
	to for memory	parameters can
	codes read CIO	replace this
	Word area.	parameter.
		See Appendix A
		to know valid
		MRC –SRC
		values to read
		this CIO memory
		area.

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