Rockwell Automation 1756-SPESMNRMXT GuardLogix Controllers User Manual - Manuel (Page 121)

Rockwell Automation Publication 1756-UM020I-EN-P - August 2012 121
Store and Load Projects Using Nonvolatile Memory Chapter 8
If a safety task signature exists when you store a project, the following occurs:
• Safety tags are stored with the value they had when the signature was first
created.
• Standard tags are updated.
• The current safety task signature is saved.
When you store a safety application project on a memory card, we recommend
you select Program (Remote Only) as the Load mode, that is, the mode the
controller should enter following the load.
Loading a Safety Project You can only initiate a load from nonvolatile memory, if the following is true:
• The controller type specified by the project stored in nonvolatile memory
matches the controller type.
• The major and minor revisions of the project in nonvolatile memory
matches the major and minor revisions of the controller.
• Your controller is not in Run mode.
You have several options for when (under what conditions) to load a project into
the user memory of the controller.
Table 36 - Options for Loading a Project
If you want to load the project Then select this
Load Image
option Notes
Whenever you turn on or cycle
power On Power Up • During a power cycle, you lose any online changes, tag values, and network schedule that you have not stored in the
nonvolatile memory.
• The controller loads the stored project and firmware at every powerup regardless of the firmware or application on
the controller. The load occurs whether or not the controller is safety-locked or has a safety task signature.
• You can always use RSLogix 5000 software to load the project.
Whenever there is no project in the
controller and you turn on or cycle
chassis power On Corrupt Memory • For example, if the battery becomes discharged and the controller loses power, the project is cleared from memory.
When power is restored, this load option loads the project back into the controller.
• The controller updates the firmware on the primary controller or the safety partner, if required. The application
stored in nonvolatile memory is also loaded and the controller enters the selected mode, either Program or Run.
• You can always use RSLogix 5000 software to load the project.
Only through RSLogix 5000
software User Initiated • If the controller type as well as the major and minor revisions of the project in nonvolatile memory match the
controller type and major and minor revisions of the controller, you can initiate a load, regardless of the Safety Task
status.
• Loading a project to a safety-locked controller is allowed only when the safety task signature of the project stored in
nonvolatile memory matches the project on the controller.
• If the signatures do not match or the controller is safety-locked without a safety task signature, you are prompted to
first unlock the controller.
IMPORTANT: When you unlock the controller and initiate a load from nonvolatile memory, the safety-lock status,
passwords, and safety task signature are set to the values contained in nonvolatile memory once the load is
complete.
• If the firmware on the primary controller matches the revision in nonvolatile memory, the safety partner firmware is
updated, if required, the application stored in nonvolatile memory is loaded so that the Safety Task status becomes
Safety Task Operable and the controller enters the selected mode, either Program or Run.
IMPORTANT Before using ControlFLASH software, make sure the SD card is unlocked if set to
load On Power Up. Otherwise the updated data may be overwritten by
firmware on the memory card.