ABB RELION REX640, Техническое руководство, Страница: 1508 / 1960

Figure 825: 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 LHMI 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. If the control is inhibited due to interlocking
conditions the pulse output
CTL_ITL_BLKD
is activated. The length of the pulse is
defined by the Interlocking Pls Len setting.
When close command is given from communication, via LHMI or 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.
When using SECRSYN in the “Command” mode, the CBXCBR setting
Operation timeout should be set longer than SECRSYN setting Maximum
Syn time.
Control functions 1MRS759142 F
1508 REX640
Technical Manual