Configuring Hardware and Communication Connections STEP 7.pdf

13.5.7 Entering Status Rows
Introduction
Group Status
Configuring Global Data Communication
For each global data (GD) packet you can specify a status double word for each
participating CPU. Status double words have the ID "GDS" in the table. If you
assign the status double word (GDS) to a CPU address of the same format, you
can evaluate the status in the user program or in the status row.
STEP 7 creates a group status (GST) for all global data packets.
The group status, which is also a double word with an identical structure to the
status double word (GDS), is formed by linking all the status double words with an
OR logic operation.
Procedure
1. Compile the global data table if it is not already in phase 1 (you can view this
information in the status bar at the bottom edge of the screen).
2. If no GD status rows are displayed in the GD table, select the menu command
View > GD Status.
3. Enter the required status double words. You can enter data only in the columns
in which the GD packet in question has entries. Enter addresses according to
the syntax of the STEP 7 programming languages.
Note: When you view status rows and/or scan rate rows, you can edit these
rows only.
4. Compile the global data table again (phase 2).
Configuring Hardware and Communication Connections with STEP 7
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