Allen-Bradley PLC-5 via Data Highway - KT Board Setup

Before you install a KT board in your computer, select a starting memory address and an interrupt number. Use an interrupt number and address that has not been used by any of the existing boards in your computer. If you have any other proprietary boards installed, check the documentation accompanying these boards to determine the interrupt numbers and addresses that have been used. (If you are using an EISA bus computer, you must run the EISA configuration program.)

Note: The following information gives specific details on how to set up the KT card - not the KTX or KTXD.

KT Card Polling vs Interrupts

You can specify the communications to operate via polling or interrupt. This is controlled by the [ABTCP] Polltime. If you set this parameter to a value other than 0, then polling will be used instead of interrupts.

KT Card Switch Settings

Set the configuration options of the 1784-KT board to the following. Refer to your Allen-Bradley documentation for further information.

Board Address Switches

* Recommended address 0xCC00.

This board uses a base memory size of 16k. To prevent conflict with other boards in your system, no memory overlap can exist when setting the memory address. You will also require this base memory size when configuring an EISA bus computer.

The EISA configuration utility may disable the interrupts of boards that are not set-up correctly. If you cannot get a response from the KT board, check the EISA configuration for the board. If there is still no response, try another interrupt. If you set the KT board to an interrupt that is used by a COM port, the EISA configuration will move the COM port to another interrupt. If you do not get a response from the KT board, disable the COM port that was re-configured.

Interrupt Jumper Setting

* Recommended interrupt 5.

The following figure shows the location of the Address Switches and Interrupt Jumper.

Use an AB diagnostics application to confirm your settings.

Setting up a PKTX Board

This is a plug and play card. No special setup is required - just confirm that the Base Memory Jumper is set to the 32-bit position. Do not attempt to manually install a driver when Windows notifies you it has detected new hardware.

Set no interrupts on this board. Interrupt request levels (IRQ) and base memory address values are automatically assigned. Plant SCADA will retrieve these configurations and use them to communicate with a board.

Note: To properly initialize the Windows component of the Plant SCADA CIKT board driver, you may need to restart your PC after installing the PKTX board, and then again after running your Plant SCADA project for the first time. Do not abort the project start up - allow it to execute right up to the menu page.