Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 186)

186 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 3 Diagnostics and Protection
Any changes to P888 [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.
• P887 [Write Mask Act] Bit 15 transitions from 1 to 0.
The status of a port’s write access can be verified at P887 [Write Mask Act]. For
example, to verify that write access was disabled, P887 [Write Mask Act] Bit 4
“Port 4” equals 0.
The port that is being used to make security changes (for example a network
adapter connected to Port 5) can only change other ports and not itself to read
only. This is to prevent the complete lockout of a drive with no future way to
regain write access.
DPI (Network)
Network Security can only be activated with external software programs that
have security capabilities, for example, FactoryTalk® software.
When P885 [Port Mask Act] Bit 15 “Security,” P886 [Logic Mask Act] Bit 15
“Security,” and P887 [Write Mask Act] Bit 15 “Security” are set to 1 “Read/
Write,” Network Security has been enabled by an external program like
FactoryTalk and is controlling the logic mask and write mask instead of the
parameter. These bits can only be enabled/disabled via the network program.
A port that is being used to communicate to the drive and set the masks or
network security can only make changes to other ports and not itself. This is to
prevent a complete lockout from a drive.