Figure 939: Transfer mode overview
Running evaluation
The transfer in progress is indicated by TR_RUNNING output. If any of the transfer
mode(s) is/are in progress, the TR_RUNNING output is TRUE. This output remains
TRUE until reset by any of the following conditions:
• The COMPL_FAST, COMPL_1ST_PH, COMPL_FBBM, COMPL_RES or COMPL_TDLY
output is TRUE
• The TR_RUNNING signal is active for more than
Max Trn run time
setting
NOT_IDLE output is TRUE when transfer is running or when transfer wait timer is
running. Transfer wait time is set with
Transfer wait time
setting. Transfer wait time
indicates minimum time between successive transfers.
All transfer mode(s) are reset if TR_RUNNING output changes from TRUE
to FALSE.
If transfer is not successful and transfer is interrupted, this is indicated with
TR_CANCEL output.
The transfer modes are explained in next chapters.
Transfer sequence
Bus transfer follows always certain sequence presented in
Figure 940
. Simultaneous
fast transfer (if enabled) is attempted first. If disabled or not successful, next
step is sequential fast transfer (if enabled). If disabled or not successful, function
attempts to perform 1
st
phase transfer. If not successful, residual voltage transfer
is attempted. If not successful, function attempts to execute time delayed transfer
(if enabled). If all previous transfer attempts are unsuccessful, finally function allows
busbar to be decoupled.
Control functions
1MRS759142 F
1772 REX640
Technical Manual
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