System Components and Technical Data
SICAM A8000 / CP-8000 • CP-8021 • CP-8022 Manual
Unrestricted
103
DC8-037-2.02, Edition 10.2017
5.5.2 DIAST0
5.5.2.1 Functions
Communication of a central station with up to 100 substations.
•
Unbalanced dial-up traffic Slave based on IEC 60870-5-101
DIAST0 is substation
•
Controlling connection establishment and disconnection
─
Connection establishment spontaneously and cyclically, control-
ling station
ó
controlled station
−
Establishing a connection cyclically at a settable interval (monitoring cycle)
∗
for transmission of low-priority data
∗
for monitoring the station availability
∗
for clock synchronization
─
Controlling connection establishment by means of modem commands
−
AT Hayes, V.25bis, X.20, X.28
−
Arbitrary main telephone number of a telephone network (PSTN)
─
Access control (LOGIN with password) in the private range of IEC 60870-5-101
─
Disconnection control in the private range of IEC 60870-5-101
•
Communication when a connection is established according to
unbalanced multi-point (dial-up traffic) based on IEC 60870-5-101
─
Data acquisition by polling (station interrogation)
─
Acquisition of events (transmission of data ready to be sent)
─
General interrogation, outstation interrogation
─
Clock synchronization
−
Each time a connection has been established
−
When a connection is established, one time per minute
─
Command transmission
─
Transmission of integrated totals
•
Co-ordination of several masters in "multi-master operation" (availability and data through-
put)
─
The controlling station can simultaneously establish connections to different controlled
stations
•
Standby transmission line(s) by means of standby telephone numbers of the same or an-
other (PSTN) telephone network
•
Multi-hierarchical configurations
•
Optimized parameters for selected transmission facilities
•
Toll-saving transmission strategies
•
Having a telephone set connected in parallel
•
Functions for supporting redundant communication routes
Note
The previously mentioned functions are described in detail in the document
SICAM SICAM RTUs • Ax
1703 Common Functions Protocol Elements
, section "
Dial-Up Traffic (DIA)
".
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