GE GFK-0787B user manual Parame Comment Ters

6

%R Temp Ref If, when the PLC is starting up, the other two PLCs are already online, %M data from the second online PLC (the one with the lower serial bus address) is also received by the initializing PLC.

In the %R Temp Ref field, enter a starting reference in %R memory to receive %M data from the second online PLC. (In this field, the %M refers to the type of data being received. In the two fields on the previous page, it refers both to the type of data being received and the memory location where it will be placed).

Notice that this field shows a initial starting reference of 257. By default, the %M data from the second online PLC is stored directly after the %R data from the first:

%R0001

%R0256

%R0257

%R0272*

%R Initialization from First Online PLC

%M Initialization from Second Online PLC

* if following the previous example

%R Start Ref If the PLCs will exchange %R data during startup, enter a starting reference and length in words. (If the PLCs will not exchange %R data at startup, enter 0 in the %R length field. Enter an starting reference for the %R data to be received from the other PLC(s) online during CPU initialization. By default, this starting reference is %R0001.

%R Length Enter a length in words for the %R data. The amount needed depends on %R memory usage in the application program. The default length is 256.

The table below lists total limits for these items.

Item	Parame-	Comment
	ters
Starting reference for %M init. data	1 to 12224	Must be on 8-bit boundaries.
Length of %M initialization data	0 to 764	Length in words.
		(start ref +16 X length)<=12288
		0 if no %M init. data
Starting reference for %M temporary ini-	0 to 16384	0 if length of %M init. data (above) is 0.
tialization data (to be stored in%R)
Starting reference for %R init. data	1 to 16384
Length of %R initialization data	0 to 4096	0 if no %R init. data

Exiting the Window

When you have completed this screen, select OK to return to the System screen. When you select OK, your entries are saved and the window disappears.

If you want to exit the window and reset all fields to their previous content, select Close or

Cancel instead.

GFK-0787B Chapter 6 Configuration 6-21