ABB REC650 ANSI Technical Manual page 278

Section 10
Control
272
• Block/deblock for open command. It is used to block operation for open command.
Note that this block signal also affects the input OPEN for immediate command.
• Block/deblock for close command. It is used to block operation for close command.
Note that this block signal also affects the input CLOSE for immediate command.
• Update block/deblock of positions. It is used to block the updating of position values.
Other signals related to the position will be reset.
• Blocking of function, BLOCK, signal from DO (Data Object) Behavior (IEC 61850).
If DO Behavior is set to "blocked" it means that the function is active, but no outputs
are generated, no reporting, control commands are rejected and functional and
configuration data is visible.
The above blocking outputs are stored in a non-volatile memory.
Substitution
The substitution part in SXSWI is used for manual set of the position for the switch. The
typical use of substitution is that an operator enters a manual value because the real
process value is erroneous of some reason. SXSWI will then use the manually entered
value instead of the value for positions determined by the process.
It is always possible to make a substitution, independently of the position
indication and the status information of the I/O board. When substitution
is enabled, the position values are blocked for updating . The substituted
values are stored in a non-volatile memory.
Time diagrams
There are two timers for supervising of the execute phase, tStartMove and tIntermediate.
tStartMove supervises that the primary device starts moving after the execute output pulse
is sent. tIntermediate defines the maximum allowed time for intermediate position.
Figure 125 explains these two timers during the execute phase.
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