IEC_BACNET_WHO_IS_INFO (STRUCT)¶
TYPE IEC_BACNET_WHO_IS_INFO : STRUCT
Struct which covers the Who-Is service device range filter information.
- InOut:
Name
Type
Comment
filterMinDevice Instance Range Low Limit
This parameter is an unsigned integer in the range 0 - 4194303. In conjunction with the ‘Device Instance Range High Limit’ parameter, it defines the devices that are qualified to respond with an I-Am service request. If the ‘Device Instance Range Low Limit’ parameter is present, then the ‘Device Instance Range High Limit’ parameter shall also be present, and only those devices whose Device Object_Identifier instance number falls within the range ‘Device Instance Range Low Limit’ .. Device Object_Identifier Instance Number .. ‘Device Instance Range High Limit’ shall be qualified to respond. The value of the ‘Device Instance Range Low Limit’ shall be less than or equal to the value of the ‘Device Instance Range High Limit’. If the ‘Device Instance Range Low Limit’ and ‘Device Instance Range High Limit’ parameters are omitted, then all devices that receive this message are qualified to respond with an I-Am service request.
filterMaxDevice Instance Range High Limit
This parameter is an unsigned integer in the range 0 - 4194303. In conjunction with the ‘Device Instance Range Low Limit’ parameter, it defines the devices that are qualified to respond with an I-Am service request. If the ‘Device Instance Range High Limit’ parameter is present, then the ‘Device Instance Range Low Limit’ parameter shall also be present, and only those devices whose Device Object_Identifier instance number falls within the range ‘Device Instance Range Low Limit’ .. Device Object_Identifier Instance Number .. ‘Device Instance Range High Limit’ shall be qualified to respond. The value of the ‘Device Instance Range High Limit’ shall be greater than or equal to the value of the ‘Device Instance Range Low Limit’. If the ‘Device Instance Range Low Limit’ and ‘Device Instance Range High Limit’ parameters are omitted, then all devices that receive this message are qualified to respond with an I-Am service request.