Rockwell Automation 1756-L7x GuardLogix 5570 Controllers - Manual (Page 112)

112 Rockwell Automation Publication 1756-UM022A-EN-P - November 2012
Chapter 8 Store and Load Projects Using Nonvolatile Memory
• Clear the program from the controller’s on-board NVS memory. For more
information, see Clear the Program from On-board NVS Memory
The following table describes the ESMs.
Save the Program to On-board NVS Memory
Follow these steps to save the program to NVS memory when the controller loses
power.
1. Remove power from the controller.
You can remove power in either of two ways:
• Turn power off to the chassis while the controller is installed in the
chassis.
• Remove the controller from a powered chassis.
Immediately after the controller is no longer powered, the OK status
indicator transitions to solid red and remains that way long enough to save
the program.
Figure 29 - OK Status Indicator.
Table 36 - Energy Storage Modules
Cat. No. Description
1756-ESMCAP(XT) Capacitor-based ESM
The controllers come with this ESM installed.
1756-ESMNSE(XT) Capacitor-based ESM without WallClockTime backup power
Use this ESM if your application requires that the installed ESM deplete its residual stored
energy to 40
μ
J or less before transporting it into or out of your application. Additionally, you
can use this ESM with a 1756-L73S (8MB) or smaller memory-sized controller only.
1756-ESMNRM(XT) Secure capacitor-based ESM (non-removable)
This ESM provides your application an enhanced degree of security by preventing physical
access to the USB connector and the SD card.
1756-SPESMNSE(XT) Capacitor-based ESM without WallClockTime backup power for the safety partner
Use this ESM if your application requires that the installed ESM deplete its residual stored
energy to 40
μ
J or less before transporting it into or out of your application.
The 1756-L7SPXT extreme temperature safety partner ships with the 1756-SPESMNSEXT
installed.
1756-SPESMNRM(XT) Secure capacitor-based ESM (non-removable) for the safety partner
OK FORCE SD RUN
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N REM PRO
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