Horner APG XL4 OCS - Manual (Page 113)

MAN0964-01-EN CH.18
June 29, 2012 Page 113 of 122
CHAPTER 18: MAINTENANCE
18.1 Firmware Updates
The XL4 OCS products contain field updatable firmware to allow new features to be added to the product
at a later time. Firmware updates should only be performed when a new feature or correction is required.
Steps for updating the firmware:
1. Loading new firmware will erase any program stored in the OCS for safety and compatibility
reasons. Please backup the application prior to doing a firmware update.
2. Copy the supplied files onto a FAT32 formatted micro SD or USB based flash device.
3. Insert the flash device into the XL4 making sure no other memory or drives are connected to the
device.
4. Press and hold the system menu for at least 6 seconds. You will be presented with a firmware
update menu.
5. If you are just updating the firmware, press the “Update Firmware” button. If you are updating the
bootloader, firmware and FPGA, press the “Update Bootloader” button. On early versions of
firmware this can take several minutes. This will take about 15 seconds on newer firmware.
18.2
Backup Battery
The XL4 has a more advanced battery system. It uses a rechargeable lithium battery. The battery
powers the real time clock when power is removed. To store registers, the battery continues to powetr
the OCS for less than a second after external power is removed. In this time the registers and other
retentive data is saved to internal flash memory. This battery will need about 8 hours of charging to last
approximately 2 years when powered off. Note for the registers to be retentive the battery only need to
be charged and present at power down.
Under normal conditions the battery in the XL4 OCS should last 7 years. Higher operating temperatures
or variations in batteries may reduce this time.
18.2.1 Indications the battery needs replacing
The XL4 OCS indicates the battery is low, failed or missing in a variety of ways. At power-up, an error
message is displayed indicating the low or missing battery. The user program can monitor the battery
using %SR55.13. This bit will turn on if the battery is low or missing. The system menu also contains a
battery status message under the diagnostics sub-menu (see the chapter on System Settings and
Adjustments).
Warning: Firmware updates are only performed when the equipment being controlled by the XL4
OCS is in a safe, non-operational state. Communication or hardware failures during the firmware
update process can cause the controller to behave erratically resulting in injury or equipment damage.
Make sure the functions of the equipment work properly after a firmware update before returning the
device to an operational mode.