Figure 828: OPEN and CLOSE outputs logic for CBXCBR
Opening and closing pulse widths
The pulse width type can be defined with the
Adaptive pulse setting. The function
provides two modes to characterize the opening and closing pulse widths. When
the
Adaptive pulse is set to “TRUE”, it causes a variable pulse width, which means
that the output pulse is deactivated if the object state shows that the apparatus
has entered the correct state before the pulse time has elapsed. The pulse will
not be extended beyond the maximum pulse width. If apparatus fails to enter
the correct state, the output pulse is deactivated after the set
Operation timeout
setting, and an error message is displayed. When the
Adaptive pulse is set to
“FALSE”, the functions always use the maximum pulse width, defined by the user-
configurable
Pulse length setting. The Pulse length setting is the same for both the
opening and closing commands. When the apparatus already is in the right position,
the maximum pulse length is given.
Pulse length setting does not affect the length of the opening pulse
when
EXE_OP
is activated via
TRIP
input.
EXE_OP
will remain active as
long as
TRIP
input is active.
Control methods
The command execution mode can be set with the
Control model setting. The
alternatives for command execution are direct control and secured object control,
which can be used to secure controlling.
The secured object control SBO is an important feature of the communication
protocols that support horizontal communication, because the command
reservation and interlocking signals can be transferred with a bus. All secured
control operations require two-step commands: a selection step and an execution
step. The secured object control is responsible for the several tasks.
• Command authority: ensures that the command source is authorized to operate
the object
• Mutual exclusion: ensures that only one command source at a time can control
the object
• Interlocking: allows only safe commands
• Execution: supervises the command execution
• Command canceling: cancels the controlling of a selected object.
Control functions
1MRS759142 F
1510
REX640
Technical Manual