GE Fanuc PCB A16B-2203-0111 Board

When PLC triggering is enabled, the OIU module will continually monitor the value of the specified register during AUTORUN mode. Triggering the OIU to change screens by the PLC is a two-step process. The first step is to set the lower eight bits of the trigger register with a value of 0-249, the screen number that is to be changed to. This is typically accomplished with a MOVE function (see your GE Fanuc Series 90 Reference Manual). The second step is to set bit 9 (decimal value 256) of the trigger register, without overwriting the lower eight bits. This is typically accomplished with an OR function. With the bit 9 set, the OIU will change to the screen (0 to 249) defined by the lower eight bits of the trigger register. It will then overwrite the trigger register with the screen number that was displayed prior to the switch. Note that the user will not have the ability to change screens from the keypad while a bit 9 of the trigger register is on, the PLC will have complete control over display selection. To return screen selection control back to the user, bit 9 must be reset to 0.

The next item on the customization menu is the AUTORUN selection. After the user has configured the custom display screens and is ready to place the module in the AUTORUN mode, this option can be selected by placing the menu pointer on the Autorun menu item and pressing the ENTER key. The operator will be prompted to enter a "display number" from 0 to 249. This display number represents the custom VF display screen that is to be shown after power-up. See Chapter 6 for more information regarding AUTORUN mode operation.

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