KB82101
Published: May 2, 2019
Revision: 8.0

Updating to firmware 9.2c or higher may fail on SNAP-PAC-R units


Applies To:

SNAP-PAC-R1
SNAP-PAC-R1-B
SNAP-PAC-R2

Versions Affected:

All versions when upgrading to this version or higher: PAC firmware R9.2c

Resolved In Version:

Current version (see Resolution, below)


Symptoms:

NOTE: If your controller is secured with a private key through PAC Terminal Secure Strategy Distribution (SSD), see NOTES for SSD (below).

Attempts to download firmware version 9.2c or higher to a SNAP-PAC-R1, -R1-B, or -R2 controller may fail, with or without displaying a message. Messages that may be reported include:

  • "'Response' file is empty. Probable cause - not enough file space"
  • "File load failure: Memory allocate/flash"
  • "Invalid CRC in file"
  • The firmware update may fail and not show any errors.

NOTES for SSD

When a controller is programmed with a private key through PAC Terminal SSD*, you may see similar symptoms if you didn’t first digitally sign the firmware. For instructions to digitally sign the firmware, see Form 1762, Using Secure Strategy Distribution (provided when you purchased PAC Terminal SSD).

If the firmware is already digitally signed and you are still experiencing this issue, follow the steps in the WORKAROUND section. 

* To determine if your controller is configured for SSD:

  1. In PAC Manager, click Tools > Inspect.
  2. Select "Other," and then set:
    • The Address field to F4080004
    • The Type to 32-Bit Integer
    • The Length to 1
  3. Then click Refresh.
    If the resulting value is 2, the controller is configured for SSD.

Workaround:

IMPORTANT: To resolve this issue you must use the current version of PAC Manager, which can be installed independent of any other PAC Project application or versions.


Workaround Steps
  1. Install the current version of PAC Manager, which will not affect other applications or versions.
  2. If both ETHERNET 1 and ETHERNET 2 are configured, follow these steps to remove the configuration from Enet 2 (which will set it back to 0.0.0.0):
    1. In PAC Manager, click Tools > Inspect, and then click Status Write.
    2. Scroll down to ETHERNET 2 Interface.
    3. If there is a valid IP address in the IP Address Value field, change it to 0.0.0.0 and then click Apply.
  3. Erase files from flash using PAC Manager > Tools > Maintenance > Clear Flash Files > Execute.
  4. Use PAC Manager > Tools > Inspect > Status Write to do the following:
    • Erase configuration from flash > Send Command.
    • Reset to defaults and Restart Device > Send Command.
  5. Use PAC Manager to download the desired firmware file to your SNAP-PAC-R controller.
  6. If the above steps did not resolve the issue, then install firmware using the failsafe bootloader mode. See "Replacing Damaged Firmware" in the ​PAC Manager User's Guide (form 1704).
  7.  If you previously removed the configuration of ETHERNET 2, use the PAC Manager Status Write page to set the configuration again.

Resolution:

The current version of PAC Manager includes a special "bridge" firmware file, and will automatically attempt to detect the cases where the intermediate step of installing bridge firmware is needed. For cases where the current version of PAC Manager doesn't fully resolve the issue, see the WORKAROUND section for additional steps to update the firmware in your SNAP PAC R-series unit.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com


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