ABB RELION SMU615 Technical Manual page 231

1MRS758407 C
energizing check. The input SYNC_ITL_BYP can be used for bypassing this control.
The SYNC_ITL_BYP input can be used to activate CLOSE_ENAD discarding the
ENA_CLOSE and SYNC_OK input states. However, the BLK_CLOSE input always blocks
the CLOSE_ENAD output.
The CB opening (OPEN_ENAD) logic is the same as CB closing logic, except
that SYNC_OK is used only in closing. The SYNC_ITL_BYP input is used in both
CLOSE_ENAD and OPEN_ENAD logics.
Figure 132: Enabling and blocking logic for CLOSE_ENAD and OPEN_ENAD signals
Opening and closing operations
The opening and closing operations are available via communication, binary inputs
or commands. As a prerequisite for control commands, there are enabling and
blocking functionalities for both opening and closing commands (CLOSE_ENAD and
OPEN_ENAD signals). If the control command is executed against the blocking or
if the enabling of the corresponding command is not valid, CBXCBR, DCXSWI and
ESXSWI generate an error message.
When close command is given from communication by activating the AU_CLOSE
input, it is carried out (the EXE_CL output) only if CLOSE_ENAD is TRUE.
If the SECRSYN function is used in "Command" mode, the CL_REQ output can be
used in CBXCBR. Initially, the SYNC_OK input is FALSE. When the close command
given, it activates the CL_REQ output, which should be routed to SECRSYN. The
close command is then processed only after SYNC_OK is received from SECRSYN.
SMU615
Technical Manual
When using SECRSYN in the "Command" mode, the CBXCBR setting
Operation timeout should be set longer than SECRSYN setting Maximum
Syn time .
Control functions
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