Parameters
Description
Exchange Data
Ranges
as a contiguous set of bytes. The total size of all combined elements can be up to 1400 bytes. For
consumed exchanges, %S memory types and override references are not allowed. Refer to the table in
the section, Data Types for Ethernet Global Data for valid memory types.
Note: If the consumed exchange length does not match that of the produced exchange, PLC Faults
and Ethernet exception entries occur.
The list of data ranges to be received in an exchange specifies:
example:
Offset Reference Low Point
High Point Description
0.0 %R 100 104
Conveyor1 in PLC1
10.0 %I 257 264
Conveyor1 limit switch in PLC1
6.5.1 Selective Consumption
Not all data ranges within a produced exchange need to be consumed by each PLC. For
example, a producer is producing an exchange consisting of a 4-byte floating point value,
followed by a 2-byte integer, followed by a 2- byte analog value. If the consuming PLC
wants to consume only the analog value and place it into %AI003, the consumer might be
configured as shown below.
Offset Reference
Low Point High Point Description
0 Ignore (bytes) 1 6 Ignore float and integer
6 %AI 3 3
Note that the total length of the exchange must be the same in producer and consumer,
even if the consumer is ignoring bytes at the end of the message. Failure to configure any
ignored bytes in the consumed exchange will result in exchange exception log and fault
table entries, error status in the exchange status data, and no data being transferred for the
exchange.
88 GFK-1503E VersaMax PLC User Manual
For public disclosure
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