Security
93
Any changes to [Write Mask Cfg] will not take effect until one of the following
three events occur:
•
Power is removed and reapplied.
•
A drive reset (not reset to defaults) is performed.
•
[Write Mask Act], parameter 597, bit 15 transitions from “1” to “0.”
The status of a port’s write access may be verified at [Write Mask Act]. For
example, to verify that write access was disabled on “DPI Port 1”, bit 1 should
equal bit 1 in [Write Mask Cfg].
The port that is being used to make security changes (e.g. if using a network adapter
connected to Port 5), can only change other ports (not itself) to “Read Only.” This is
to prevent the complete lockout of a drive with no future way to regain write access.
The figure on the left shows how DriveExplorer will respond when connected to a
PowerFlex 70 EC drive that has security enabled on DPI Port 5. The “ ” icon will
also appear in the program window to indicate that the adapter you are
communicating through has its port write access disabled. The figure on the right
shows how a HIM will respond when a write is attempted on a port that does not
have write privileges.
When connected to a port configured for “Read Only” with programming tools that
do not have security functionality, errors will occur for any write attempt. Examples
of such tools are HIMs with older firmware, earlier versions of Drive Tools or Drive
Explorer, and third party software. See the following example messages when using
tools that do not support the security function:
F-> Stopped
Auto
Security Enabled
Access Denied
F-> Stopped
Auto
Device State Has
Disabled Function