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Write-On-Demand – Some command groups are built to be used as Write-On-Demand command groups. To use a Write-On-Demand command group you must check the Write on Demand check box in the Poll Record Edit dialog box. You must also configure a "write-trigger" digital output block in DBB with the I/O address DEV:PRN:WRITE to cause the write to occur. A write will not occur when you change one of the output values from a link on a FIX screen. When a one is written from the "write-trigger" DO block all values from that command that were changed since the last occurrence of the "write-trigger" will be written to the device.

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