11 LOADING PROFIBUS GATEWAY MODULE (PGM)
11.1 Initial load order guidelines
Perform the initial load of control strategy components from the Project view in the following order to minimize
possible load interaction generated error messages.
Refer to the Control Building User's Guide for more information about loading components.
11.1.1 Loading PGM function blocks
This sections provides information on loading the PGM block and its associated function blocks.
Loading the PGM block
To load a PGM block, the PGM platform must be physically present at the configured address. However, if the
PGM platform is not physically present, appropriate errors are returned.
When you load the PGM function block for the first time, the load transfers the PGM platform configuration
data from the ERDB to the PGM platform.
After the load is complete, the PGM platform block automatically transitions to OK state.
Loading the PGM block with contents
To load a PGM block with contents (DSBs, PBLink blocks), the PGM platform must be physically present at
the configured address. However, if the PGM platform is not physically present, appropriate errors are returned.
After the load is complete, the PGM platform block automatically transitions to RUN state.
Loading the Protocol Block
To load a Protocol Block, the PGM platform block must be previously loaded. However, if the PGM platform is
not present, the Protocol Block load fails and will be canceled.
When you load the PGM block, the Protocol Blocks are also automatically loaded. However, you can also load
the Protocol Blocks individually.
The Protocol Block load operation loads the Protocol Block and the associated field network configuration to
If you make changes to the field network configuration such as bus-related changes, after the Protocol Block is
loaded, you must reload the Protocol Block for the changes to be updated. During the reload, the connection
between the PROFIBUS slave devices and the master is lost. Therefore loading the updated Protocol Block must
be planned carefully. Also, the behavior of the slave devices during this connection loss is based on their
configuration. For most of the slave devices, you can configure connection breakout time during which they keep
their outputs. However, some of the slave devices lose their outputs immediately in the event of a connection loss
with the master.
If you make changes in slave devices such as changing the connection breakout time or adding another slave
devices to the same Protocol Block, the connection between the master and the slave device is not lost.
PGM block (includes PBLink1 and PBLink2)
Control Module containing the PROFIBUS I/O function block