Echelon LNS DDE Server - Manual (Page 75)

Format command. Once the extended form is assigned to the network variable, the
DDE client application does not need to specify the format type in the item name.
To override the default format, use the –t parameter described in the previous
section. You may either specify a standard format, or specify a user format from the
format file described in Appendix A, Resource Files, using the following syntax:
#<program id>[<selector>].<format name>
The fields are defined as follows:
program id
The program ID specified in the format file, in hex, without
spaces or colons. This does not have to match the program ID
for the device containing the network variable.
selector The scope selector specified in the format file. The second line
of the format file specifies a scope selector name that specifies
which device types are covered by the format file. Translate
this selector to a selector index using the following table:
Scope Selector Selector Name
1 DEVICE_CLASS
2 DEVICE_CLASS and SUB_CLASS
3 MANUFACTURER
4 MANUFACTURER and
DEVICE_CLASS
5 MANUFACTURER and
DEVICE_CLASS and SUB_CLASS
6 MANUFACTURER and
DEVICE_CLASS and SUB_CLASS
and MODEL
The selector does not have to match the selector used by the
functional profile template defining the L ON M ARK object(s) on
the device.
format type
The format type name specified in the format file. The format
type name must match a type name in the type file associated
with the format file, or in a type file with a lower scope
selector value.
format modifier
A modifier for the format type name that allows multiple
formats to be specified for the same type.
For example, here is a sample user format file.
Set program_id 80:11:22:33:44:55:66:77;
Set selector DEVICE_CLASS;
//
UNVT_s_short: text("%d”);
UNVT_s_long: text("%d”);
UNVT_u_short: text("%d”);
UNVT_u_long: text("%d”);
//
LNS DDE Server User's Guide 5-5