Rockwell Automation Publication 1756-UM004C-EN-P - June 2021 17
Chapter 1 ControlLogix EtherNet/IP Network Device Overview
Protected Mode The 1756-EN2F, 1756-EN2T, 1756-EN2TP, 1756-EN2TR, 1756-EN3TR, and 1756-
EN4TR support explicit protected mode.
(1)
When in this mode, the module
does not allow any configuration changes.
Enabling Explicit Protected Mode
To enable the module in an “explicit protected mode state”, follow these steps.
1. Set the rotary switches
to position ‘900’.
2. Power up the device, and wait for the display to scroll, “Protected Mode –
Change Switch Settings”.
3. Power down the device.
4. Set the switches for normal operation.
5. Power up the device.
6. The device is now in Explicit Protected Mode.
Operation in Explicit Protected Mode
While working in protected mode, the module rejects any CIP™ explicit
messages that would change the configuration of the module. For example,
you cannot change the IP address, speed, or duplex settings when the module
had Explicit Protected Mode enabled.
Disabling Explicit Protected Mode
To disable the “explicit protected mode state”, follow these steps.
1. Set the rotary switches on position ‘000’.
2. Power up the device, and wait for the display to scroll, “Unprotected
Mode – Change Switch Settings”.
3. Power down the device.
4. Set the switches for normal operation.
5. Power up the device.
6. The device is now in Unprotected Mode.
(1) For 1756-EN2F, 1756-EN2T, EN3TR, and 1756-EN2TR Versions 11.001 and later.
For 1756-EN2TP and 1756-EN4TR all versions.
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