HPOM Data Structures

HPOM provides a set of data structures which hold information about HPOM objects.

• OPCDTYPE_MESSAGE
• OPCDTYPE_MESSAGE_ID
• OPCDTYPE_MONITOR_MESSAGE

The attributes of each of these data types are described in the following tables. The tables show which of the attributes can only be retrieved and which can be set.

• Functions to retrieve attributes
  • opcdata_get_long()
  • opcdata_get_str()
  • opcdata_get_double()
• Functions to set attributes
  • opcdata_set_long()
  • opcdata_set_str()
  • opcdata_set_double()

The description also includes information about the type of the attribute value (long, string, or double), and, if the attribute value is a string, the maximum character length (for example, str[32]).

The available predefined values are defined in the include file opcapi.h