Items – Echelon LNS DDE Server User Manual
Page 69
Items
The Item is the last component of a DDE address. The topic type as
described in the previous section determines the format of the item. The
item format consists of one or more of the following components:
Device_name
Device name, as defined in the LNS database.
LMO_name
L
ON
M
ARK
Object name, as defined in the LNS database.
NV_name
Network variable name. See Chapter 5 for more information.
CP_name
Configuration property name. See Chapter 6 for more
information.
Field_name
Field name within a network variable or configuration
property.
Msg_name
Message tag name for application and foreign frame messages.
See Chapter 7 for more information.
Msg_code
Message code for application and foreign frame messages.
Valid ranges are 0-62 and 64-78. See Chapter 7 for more
information.
System_property System property name. See Chapter 8 for more information.
Device_property Device property name. See Chapter 8 for more information.
LMO_property
L
ON
M
ARK
object property name. See Chapter 8 for more
information.
Parameters
Optional parameters. See Chapters 5,6, and 7 for more
information.
The components above are combined as shown in the following table to
define an item. Components listed inside brackets ([ and ]) are optional.
Dev
Device_name.Device_property [Parameters]
DevCP
Device_name.CP_name[.Field_name] [Parameters]
DevNV
Device_name.NV_name[.Field_name] [Parameters]
DevNVCP Device_name.NV_name.CP_name[.Field_name] [Parameters]
LMNV
Device_name.LMO_name.NV_name[.Field_name] [Parameters]
LM
Device_name.LMO_name.LMO_property [Parameters]
LMCP
Device_name.LMO_name.CP_name[.Field_name] [Parameters]
LMNVCP
Device_name.LMO_name.NV_name.CP_name[.Field_name] [Parameters]
Netvar
Device_name.NV_name[.Field_name] [Parameters]
NV
Device_name.NV_name[.Field_name] [Parameters]
NVCP
Device_name.NV_name.CP_name[.Field_name] [Parameters]
System
System_property [Parameters]
MsgTag
[Device_name.] msg_name [.Msg Code] [Parameters]
MT
[Device_name.] msg_name [.Msg Code] [Parameters]
LNS DDE Server User's Guide
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