Checking For Errors In The Sequence Table - Omron CX-PROCESS TOOL V5.2 - 12-2009 Operation Manual

Creating Sequence Tables
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3-8-10 Checking for Errors in the Sequence Table

The table above shows the relationship between the main table and the refer-
ence table. The evaluation results for the conditions set in the reference table
are treated as the condition signals for the main table. For details on the table
reference function, refer to the Loop Control Boards Operation Manual (Cat. No.
W406).
Creating the Reference Table
Use the following procedure to create the reference table.
1. Register a sequence table.
2. Double-click the sequence table that is to be the reference table in the Work-
space tree. The Sequence Table Window will open.
3. Right-click in the Sequence Table Window and select Reference Setting –
Reference Table from the pop-up menu or select Operation – Reference
Setting – Reference Table from the main menus.
Using the Reference Table in the Main Table
Use the following procedure to set the main table to access input signals from
the reference table.
1. Display the Signal Dialog Box in the main table.
2. Select the Input Tab and select TBL as the command type.
3. Set the reference table as the source.
Clearing the Reference Table Setting
Use the following procedure to clear the reference table setting by setting the
table as a main table.
1. Double-click the reference table in the Workspace. The reference table will
open.
2. Right-click in the Sequence Table Window and select Reference Setting –
Main Table from the pop-up menu or select Operation – Reference Table
– Main Table from the main menus.
Right-click and select Check Errors from the pop-up menu.
Note The sequence table can be downloaded to the Loop Controller even if the above
check finds errors. Before downloading a sequence table with errors, confirm
that the error will not affect normal control operation.
Sequence tables can be transferred to the Loop Controller even if errors have
been detected in them in the error check. If transferring a sequence table with an
error, first make sure that the error will not affect control operations before per-
forming the transfer.
An error will occur in the following cases and the transfer will not be made to the
LCB.
• The condition or operation signal is undefined and there is only Y/N data.
• The timer cycle is shorter than the operation cycle of the sequence table.
• There is no step number specified using THEN and ELSE.
• There is no step number specified using the STEP command in the refer-
ent sequence table N is specified for the non-holding output, pulse output,
STEP command, RUN command, STOP command, and ITEM writing.
• The block address of a sequence table is specified in a STEP command,
RUN command, or STOP command within that sequence table.
• A TBL command is set in a reference table.
• The block address of a sequence table is specified in a TBL command
within that sequence table.
Section 3-8
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