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CTI 2572 Installation and Operation Guide
70
NOTE:
When this option bit is set, the number of V memory words written will be 1 + the data length.
Data ID - This number identifies the data to be consumed. This number must match the Data ID of
one of the producers.
MSW: Destination Memory Address –Most Significant Word of the address of the V memory block
to which the consumed data will be written. For addresses below 65,536, set this value to 0.
LSW: Source Memory Address - Most Significant Word of the address of the V memory block to
which the consumed data will be written.
Data Length - Specifies the number of data words to be consumed. You may choose to consume less
data than the amount produced.
Starting Data Word - Allows you to specify an offset into the block of data being produced. For
example, you may wish to ignore the first 100 words in the data block.
NOTE:
Use of the Starting Data Word, coupled with the Data Length Specification allows different PLCs to
consume different parts of the same produced message. For example. PLC A may produce 300
words of control data. PLC B may consume the first 100 words, PLC C the middle 100 words, and
PLC D the last 100 words. See Application Examples.
Close DataShare Instance
This command terminates the instance. The Connection Number may be re-used in a subsequent
instance.
Offset Description Hex Decimal
0 Error Word 0000 0
1 Command (Close DataShare Instance) 0x2F04
2 Connection Number (of instance to Close) 19241-19248
3 Option bits (Reserved – Set to 0) 0000
4-15 Reserved, Set to 0
Error Word - will contain an error code if an error occurs. You should set this value to 0 each time
you trigger the command block to clear previous error codes.
Command Code – The number for this command is 0x2F04.
Connection Number – Connection Number of Instance you are closing
Option Bits - Reserved for future use.