292 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Appendix G Connect to Networks via Ethernet Interface
Disable the Ethernet Channel Disable the Ethernet channel by performing the following steps:
1. From the status file, set the status bit S:36/0 from 0 to 1.
2. Download the project to the MicroLogix 1400 controller.
3. Perform a power cycle in order for the changes to take effect.
IMPORTANT You can only change the status bit S:36/0 in an offline project.
IMPORTANT Consider the following when you enable or disable the Ethernet channel
using the status bit S:36/0:
• To enable or disable the Ethernet channel, a power cycle on the controller is
required for the change of status to take effect.
• If the Ethernet channel is set to disable, the other Ethernet-related protocols
must also be set to disable (except for BOOTP as it returns to enable mode
even if you set it to disable), in order for the user project to download
successfully.
• If the Ethernet channel is in disable mode (after a power cycle), you cannot
set the Ethernet channel and the other Ethernet-related protocols (except
for BOOTP) back to enable mode at the same time. To do this, you need to
set the Ethernet channel to enable and perform a power cycle on the
controller first before you can enable the other Ethernet-related protocols.
• If the Ethernet channel is disabled and you configured the MSG instruction
for channel 1, the instruction indicates an error as the channel is shut down
during RUN mode.
IMPORTANT At least 1 of the 3 channels must be active to enable communication with
the RSLogix 500 software. You cannot disable the Ethernet channel if both
serial channels are already configured as disabled. If you attempt to
change the status bit S:36/0 from 0 to 1, it reverts to enable (0) after the
power cycle.
See also Appendix F
for information on how to disable the Incoming
EtherNet/IP Connections.
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