Omron SYSMAC CS1W-LCB01 Operation Manual page 297

How to Use the Sequence Table Block
• The execution steps (ITEM101 to ITEM154) in the reference table are always 0.
• If the reference table condition rules are set to blank in the rule row, the reference table evaluation results
will always be "not satisfied." Therefore, the evaluation results for the TBL command will be as shown in the
following table.
Condition rule for
TBL command in
main table (Y, N, or
blank)
Y
N
Note 1. The main table and reference table each operate independently in the calculation cycle. The calcula-
tion order and calculation cycle are not checked.
2. The values referenced by the main table are "not satisfied" from the time Loop Controller operation
starts until the reference table is executed.
3. Execution can be stopped for the reference table only (initial execution, S1 execution, constant exe-
cution, etc.). Reference tables retain the condition status when execution is stopped. Main tables op-
erate by referring to that status.
4. When expanding the number of rules for the main table, the expansion section of the condition rule
setting for the TBL command will be treated as blank.
5. Reference tables will not change steps even if step numbers are set.
6. ITEM 101 to ITEM 164 in the reference table are always OFF during execution.
7. The conditional information for reference tables is referenced from the main tables. Therefore, action
signals, action rules Y/N, and destination steps (THEN, ELSE) will not be executed.
8. If the calculation cycle for the main table and reference table is different, correct evaluation will not be
possible until the reference table is executed. Therefore, all conditions will not be satisfied when op-
eration is started.
Limit on Numbers of Main Tables and Reference Tables
Up to 200 sequence tables including main tables and reference tables can be used. The sequence tables set
as reference tables can be expanded with up to 64 conditions/actions, and 64 rules. The same applies to main
tables. When expanding either the rule or condition/action column, two tables are used, and when expanding
both columns, four tables are used.
Execution Errors
• The TBL command cannot be used in reference tables. Downloading is possible, but an execution error
(error code 81) will occur if operation is started.
• An execution error (error code 81) will occur in the main table if a reference table step is specified using the
STEP command.
• An execution error (error code 81) will occur in the main table using the TBL command, if downloading is
continued after a warning is displayed and operation is started.
• An execution error (error code 81) will occur if the block address in the TBL command is not a reference
table or does not exist.
• An execution error (error code 81) will occur in the table used to execute the STEP command if a subtable
is specified in the STEP command.
Actual Sequence Tables
Summary
• Register the sequence table in function block model 302 and set the desired values in the table.
• The input conditions are described in the upper half of the table and the actions are described in the bot-
tom half of the table.
TBL command reference
result
OFF (not satisfied)
ON (satisfied)
Appendix B
263