Allen-Bradley 1407-CGCM, User Manual, Page: 92 / 252

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
#HAPTER CGCM Unit Configuration
4RACKING4AB
The Tracking tab is used to configure the unit’s internal and redundant tracking
parameters. Enter the internal tracking, redundant tracking, and traverse rates in
the appropriate fields of the Tracking tab.
Internal Tracking
•
Enable internal tracking - This checkbox sets the Boolean tag
Internal_Tracking_En in the Configuration data table. When the value
of this tag is 1, internal tracking between voltage regulating modes is
enabled and the Traverse Rates are enabled. If the tag value is 0, both the
Traverse Rates and tracking between regulation modes is disable.
•
Internal Tracking Rate - This setting changes the rate at which the internal
tracking function matches the non-active excitation control modes to the
active excitation control mode. This sets the value of the
InternalTrackRate tag in the Configuration table, expressed in seconds.
•
Internal Tracking Delay - This setting adjusts the delay in the internal
tracking function. This sets the value of the
InternalTrackDelay tag in the
Configuration table, expressed in seconds. Its purpose is to reduce the
likelihood that the short-term response of the active regulating mode to an
upset is transferred to a new mode of operation when the mode is
switched. If the internal tracking delay is too short, the transient response
to an upset is transferred to the new operating mode. Conversely, if the
tracking delay is set too long, there is a risk of an old operating point being
transferred to the new operating mode, resulting in an undesirable bump.