5.2 Configuring a PGM
Perform the following steps to configure a PGM
Choose File > New > Interface Modules > Profibus Gateway Module (2 Links).
The PGM block configuration form appears.
In the Tag Name box, type the name of the PGM (a maximum of 16 characters) or accept the default.
In the Item Name box, type the item name.
In the Device Index box, type a valid device index number. Use odd numbers for non-redundant and
primary PGM blocks.
If you do not enter a valid device index number, an error message appears when you close the configuration
Check the Module is redundant check box if you want the module to be one of a redundant pair.
If you select the check box, the secondary tag name appears in the Redundancy Configuration box.
The secondary PGM block is added when the primary PGM block configuration form is closed.
In the CPU Free Low Alarm box, type the value at which an alarm is to be generated when the available
CPU resources fall less than this limit.
Use the online help as a guide to complete the configuration entries on the other tabs.
The PGM block with two Protocol Blocks are added to the Project tree.
Do not set the CPU Free Low Alarm value lower than the default value of 20%.
The CPU Free Low Low Alarm (%) parameter is set to a fixed, minimal value. This parameter is intended to
help the engineer or the operator ensure that enough CPU remains free to handle bursts in communication or
other unexpected and/or anomalous loads.
5 PROFIBUS GATEWAY MODULE (PGM) BLOCK