20 Rockwell Automation Publication 1756-UM004C-EN-P - June 2021
Chapter 1 ControlLogix EtherNet/IP Network Device Overview
Secure Digital Card Secure Digital Card
The 1756-EN4TR supports the use of a Secure Digital (SD) card to store
configuration data, for example, the IP address or network communication
rate for each port.
The SD card slot is inside the front panel of the module.
When the card is powered up, the device uses the configuration from the card
if the configuration does not exist in the device. When a blank card is inserted,
or powered up, the configuration is copied from the device to the card that was
inserted.
If the module powers up with a configuration that does not match the
configuration on the already inserted SD card, the configuration on the SD
card is used.
If the module is already powered, and an SD card is inserted, a warning
message is displayed.
To change these results, do one of two things. One option is to do an out of box
reset on the module, if you want to use the configuration on the SD card. A
second option is to modify one of the configuration settings on the device, if
you want to use the configuration on the device.
To see other potential error messages, see Table 8 on page 49.
IMPORTANT
If an SD card with a valid configuration is inserted into a 1756-EN4TR
module that does not match, an error is displayed on the status
display on the front of the module warning of this mis-configuration.
If the SD card is intended to be used in the 1756-EN4TR module it
must be cleared by external means and re-inserted. If this is not
done prior to the next power cycle of the
1756-EN4TR with the non-matching configuration, this configuration
is copied to the 1756-EN4TR with all settings including the IP Address
from the original module possibly causing an IP Address conflict.
SD Card inside front panel.
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