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Syntax samples
Locations specified by this rule are selected only if all of the destinations (primary or alternate) listed in the preceding routings of the same block are unavailable due to any downtime, including a shift. One use of BACKUP is to handle a machine that is not functioning, and entities need another destination to continue.
Inside the rule field of the Routing edit table, at the end of a routing block, after one or more primary routings or even an ALTERNATE rule. Conditions for using Backup routings with either USER CONDITION and PROBABILITY routing rules are given in the notes for these rules.
Example
After an entity, Chip, completes a 3 minute operation at CNC, it is routed to Stamp1 when Stamp1 becomes available. Only if Stamp1 and the alternate location (Stamp2) are both down will it be routed to Stamp3. If Stamp3 is also unavailable, Chip will wait for Stamp3 only as long as both Stamp1 and Stamp2 remain down.
Process Table
|
Entity |
Location |
Operation (min) |
|---|---|---|
|
Chip |
CNC |
WAIT 3 |
Routing Table
|
Blk |
Output |
Destination |
Rule |
Move Logic |
|---|---|---|---|---|
|
1 |
Chip |
Stamp1 |
FIRST 1 |
|
|
Chip |
Stamp2 |
ALT |
|
|
|
Chip |
Stamp3 |
BACKUP |
|
ALTERNATE routing rule. Also see Processing.