Table 34: Information in the command direction
TYPE Description
<6> Time synchronization
<7> General interrogation (polling)
<10> Generic data
<20> General command
<21> Generic command
<24> Order for disturbance data transmission
<25> Acknowledgement for disturbance data transmission
Timeouts
• Protocol time-out <50 ms as defined in the IEC recommendation applies for the protocol.
• When a command to upload the disturbance recorder data is issued, the data has to be
transferred from the Bay Unit to the Central Unit first before they are transferred via the
IEC bus. The timeout from the instant the upload command is issued to the receipt of the
data varies in relation to the length of the disturbance record. The following applies:
STP timeout <2.5 minutes per 1 second of disturbance record data (4I+4U, 2400 Hz).
• Once the transfer of disturbance recorder data has started, the timeout changes to:
Transfer timeout <1 Minute
Section 4 1MRK 511 451-UEN B
IEC60870-5-103
28 Distributed busbar protection REB500
Communication protocol manual IEC60870-5-103
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