Ashida ADR233B - Time Synchronisation; Spontaneous Events; General Interrogation (GI)

Doc ID : ADR233B/IM/01
Ref ID : ADR233B/IM/CS
Rev No. : 05
Page No. : 202 of 479
ADR233B
7.3.2 Initialisation
Whenever the device has been powered up, or if the communication parameters have been
changed, a reset command is required to initialize the communications. The device will respond
to either of the two reset commands; Reset CU or Reset FCB (Communication Unit or Frame
Count Bit). The difference between the two commands is that the Reset CU command will clear
any unsent messages in the transmit buffer, whereas the Reset FCB command does not delete
any messages.
The device will respond to the reset command with an identification message ASDU 5. The
Cause of Transmission (COT) of this response will be either Reset CU or Reset FCB depending
on the nature of the reset command.
The relay will also produce a power up event, when the relay is powered up.
7.3.3 Time Synchronisation
The time and date can be set using the time synchronisation feature of the IEC 60870-5-103
protocol. The device will correct the transmission delay depending on communication speed.
For this, transmission time, required for the time synchronization frame from the Master to IED,
considering current baud rate is added in the received time.
The device will correct the transmission delay depending on baud rate. If the time
synchronisation message is sent as a send/confirm message then the device will respond with a
confirm message. A time synchronisation Class 1 event will be generated/produced whether the
time-synchronisation message is sent as a send confirm or a broadcast (send/no reply)
message.
7.3.4 Spontaneous Events
Events are categorized using the following information:
Function type
Information Number
The IEC 60870-5-103 profile in the Menu Database contains a complete listing of all events
produced by the device.
7.3.5 General Interrogation (GI)
The GI request can be used to read the status of the device, the function numbers, and
information numbers that will be returned during the GI cycle. These are shown in the IEC
60870-5-103 profile in the Menu Database.