Siemens C79000-G8976-C156-07 quick start Fdl Fms Iso/Tcp

5 Project Engineering for the OPC Server

Table 5-1

Parameter	Possible Settings / Significance		Can be set for a specific protocol
/ Function
		DP	FDL	FMS	S7	ISO/TCP	DP class 2	PROFInet	PROFInetIO	SNMP
Scan cycle	Here, you make the settings to control	x	x	x	x	x	x	x	x	x
time	updating by the OPC Server.
	The scan cycle time decides how often
	the OPC server updates the values the
	OPC items.
Access	You can specify the access rights to	x	x	x	x	x	x	x	x	x
protection	individual variables or variable groups for
	each specific protocol. You can, for
	example, prevent variables calculated
	internally by the controller from being
	overwritten.
	As default, no access protection is
	activated.
VFD	VFD (Virtual Field Device) is the neutral			x
	description of a device used in FMS.
	Communication connections (FMS
	connections) are then configured for the
	VFDs in project engineering.
	Here, you inform the OPC server of the
	required VFDs. During project
	engineering, you then assign the VFD to
	the FMS connection. When accessing
	variables in the PC application, you also
	reference the VFD.
	Extra function: creating the object
	dictionary
	Here, you can also create the object
	dictionary (OD) belonging to a VFD. The
	FMS variables (name and structure) are
	defined in the object dictionary.
Connection	Here, you can make the settings required				x
parameters	for communication for services that do
	not require specific connections to be
	configured in project engineering.
Segmenta-	Special settings for providing the data					x
tion	buffers independent of specific
	connections.
Use					x
symbols

Please note that the parameters are described in detail in the online help for each individual dialog in NCM PC.

Commissioning PC Stations - Manual and Quick Start	59
Release 5/2005

C79000-G8976-C156-07