Gardner Denver Driver Manual
Page 11 of 13
Appendix A. Useful Features
Appendix A.1. Method Used to Isolate Specific Items
A Passive_Client Map Descriptor must be used after an active RDBC Map Descriptor. The driver uses
the Active Map Descriptors to poll the Controller and then searches for Passive Client Map Descriptors
with matching Node_Name and Gar_Cmd fields. It then stores the data items as specified by the
Gar_data field from the data collected by the preceding active Map Descriptor.
Appendix A.2. Poll Data Length
The length of the data packet retrieved from the Controller during a poll is always fixed for each of the
three types of data polls. When specifying a specific Gar_Data item using a RDBC active Map
Descriptor, the driver receives all data of Gar_Cmd type from the controller in a single poll, but only stores
the data item in question.
