Bradley Smoker PLC-5 Enable or Disable the Forces, Radix Force Screen Display, Binary, Bits

13-8Programming Considerations

Step 3 - Use the Programming Software to Enter Force Values for the Specified Data Table Files

The block-transfer forcing screens include a function that lets you change the radix among binary, octal, HEX/BCD, and ASCII. If you select the binary radix, the display is similar to the I/O forcing display. The programming software displays forces differently, depending on the selected radix:

Radix	Force	Screen Display
binary	no force	. (period)
	off	0
	on	1
other	no force	. (period)
	all bits	forced value
	some bits	BINARY
		(use binary radix to view the forced
		bits)

If you enter a force value on the block-transfer force screen, you force the entire word to the value you enter, even if the word was only partially force before.

Step 4 - Enable or Disable the Forces

Enabling and disabling extended block-transfer forces is similar to enabling and disabling I/O forces. For more information, see page 13-1.

Using Extended Forcing with Time-Critical Applications

For many applications in which you execute multiple block-transfers on a continuous basis, you do not need any additional programming when using extended forcing. When you configure extended forcing, block-transfer instructions only move data between the block-transfer modules and the block-transfer data buffers. Data is forced and moved during housekeeping. In applications in which you perform a single block-transfer or in which new block-transfer data must be completely transferred in every block-transfer instruction, you must include additional programming to make sure that you are using valid, updated data.

Publication 1785-UM012D-EN-P - July 2005