Model 5200 High-Level Orderpicker
Section 8. Theory of Operation Primary Memory
Primary Memory The primary memory location of the lift truck’s identification and options are stored in the Carriage Manager (CM). A back-up copy of this information is stored in the Steer/Tractor Manager (STM). Every time the lift truck is started, a comparison is performed between the two. If they do not agree or one is “Blanked”, the hierarchy is:
passes, the STM is communicating and the CM should be replaced. c. If the test fails, the STM is not communicating and should be replaced. Installing a card that has firmware installed for a different model lift truck can lead to an inoperable lift truck.
1. When a pre-programmed CM is installed in a lift truck, the information programmed into the card is downloaded to the STM when the key is first turned ON. 2. If a CM with the primary memory “Blanked” is installed in the lift truck, the information stored in the back-up memory location on the STM is uploaded to the CM. These rules are always true except when FlashWare has been connected to the STM and software has been loaded or an option has been changed. When this has been done, there is a bit in the STM that is activated and the STM now becomes the primary memory location. When the FlashWare program is shut down, the bit in the STM is turned off and the information is uploaded to the CM. The CM again has the primary memory status. 1. A pre-programmed CM is not required unless one of the following codes is the cause for replacement: 4,6, 5,4, or 5,5. When troubleshooting an inoperable lift truck, do not install firmware or change an option with FlashWare until the lift truck is functional again. 2. When trying to install new firmware or change an option and the attempt fails: a. Run the test portion of the program. If communication is found to be working between the PC and the CM, they are functioning correctly. b. If there is no communication, run a diagnostic test for a component on the tractor side of the lift truck. If the test
Publication Number: 1043922B, Revised: 2 Sept 2015
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