ProSoft ProLinx 104S, Руководство по протоколу

Страница: 101 / 157

104S ♦ ProLinx Gateway IEC-60870-5-104 (104S) Protocol Implementation
(Firmware v3.00 and later) Protocol Manual
ProSoft Technology, Inc. Page 101 of 157
January 22, 2010
If a database bit address (1 to 64000) is present, the application may consider the
point with an invalid flag if the previous logic checks the IV bit as 1 during
consecutive IV Check Delay scans. The IV bits would have to be reset to 0 to set the
point to valid state.
The IV DB bit defined for each point can be unique, or many points may share the
same bit. The last case could be used when the points on an I/O gateway are to be
considered as one set. In this case only a single bit is required. For a point that is the
result of a computation, the valid quality state could be set for each point individually.
3.6.5 Event Priority
Event Priority permits ASDUs that generate events to be placed in priority queues
that are set by the user. The configuration file contains the following parameters to
support this feature:
The Set Priority Queues parameter must be enabled for this feature to be used.
Each of the ASDUs affected by this feature must be assigned a unique priority index
from 0 to 7. Events of the ASDU with a priority of 0 will always be reported before
any others when they are present.