Schneider Electric 840 USE 106 0 manual Dialog, 12K Option

Using a Quantum 984 HSBY System

Hot Standby	Using the Hot Standby dialog, you have a great deal more flexibility in determining
Dialog	how much or how little State RAM gets transferred. You also can manage how much
	gets transferred in all scans and how much gets transferred in pieces over multiple
	scans.
	The parameter you select in the Transfer field of the State RAM determines the
	f exibility you have in defining your state RAM transfer area. You may choose from
	two options:
	l12K
	User Defined
	Note: The remaining entry fields of the dialog may or may not be used depending
	on which one of these two parameters you choose.
	Note: No matter which option you choose, remember that the command register
	must be included in the block of registers transferred on every scan.
12K Option
	The 12K option mimics the CHS instruction. It gives you a predefined state RAM
	transfer area with a predetermined maximum of each reference data type to be
	transferred. The predefined transfer area consists of the following:
	All the 0x discrete outputs in state RAM up to a maximum of 8192, including their
	associated histories.
	All the 1x discrete inputs in state RAM up to a maximum of 8192, including their
	associated histories.
	If the total number of registers (3x and 4x combined) implemented in state RAM
	lis 10 000 or less, then all the registers plus the up/down counter history table.
	If the total number of registers (3x and 4x combined) implemented in state RAM
	is greater than 10 000, then 10 000 registers transfer in accordance with the
	formula described in System Scan Time, p. 33.
	If you choose the 12K option, the State RAM and Additional State RAM area
	become irrelevant. You can not customize the transfer area or transfer additional
	data in groups over multiple scans. Any entries in these fields are ignored.

98 840 USE 106 00 January 2003