Chapter 4. Configuration66 PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual GFK-2224QSelective ConsumptionNot all data ranges within a produced exchange need to be consumed by each PLC. For example, a producer isproducing an exchange consisting of a 4-byte floating point value, followed by a 2-byte integer, followed by a2-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 Variable Ref Address Ignore Length Type Description0.0 Ignore True 6 Byte Ignore float and integer6.0 Var01 %AI0003 1 WORDNote that where EGD signatures are not used the total length of the exchange must be the same in producerand consumer, even if the consumer is ignoring a portion of the exchange. Failure to configure any ignoredbytes in the consumed exchange will result in exchange exception log and fault table entries, error status in theexchange status data, and no data being transferred for the exchange.
