Chapter 5. Ethernet Global Data90 PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual GFK-2224QEffects of Modifying Consumed Exchange ParametersFor consumed exchanges, the combination of Producer ID and Exchange ID uniquely identifies the exchange.Modifying any of these parameters will make the exchange incompatible and require an update to theproducer to restore compatibility.Parameter BehaviorProducer ID Redefines the exchange. Causes a major signature change in the producer. Exchangewill be incompatible.Group ID Determines the producer of the exchange and may affect compatibility. For details,refer to “Sending an Ethernet Global Data Exchange to Multiple Consumers” on page73.Exchange ID Redefines the exchange. Causes a major signature change in the producer. Exchangewill be incompatible.Adapter Name Deletes an exchange from one Ethernet module and adds an exchange to another.Assuming no other parameters change, this will not affect compatibilityTo any EGD Class 2 device sending commands that operate on this exchange, it willappear that the exchange has been deleted. The Class 2 device must be updated todirect the commands to the IP address of the adapter where the exchange has beenmoved.Update Timeout Modifies existing exchange. Does not affect compatibility. Note that decreasing aconsumed exchange’s update timeout without updating the correspondingproducer’s production period may cause timeouts.Effects of Modifying Produced Exchange ParametersParameter BehaviorExchange ID Redefines the exchange. Causes a major signature change in the producer.Adapter Name Deletes an exchange from one Ethernet module and adds an exchange to another.Assuming no other parameters change, modifying this parameter does not affectcompatibility.Destination Type Determines the consumer(s) of the exchange and may affect compatibility. Fordetails, refer to “Sending an Ethernet Global Data Exchange to Multiple Consumers”on page 73.Destination Determines the consumer(s) of the exchange. Affects compatibility.Produced Period Modifies the existing exchange. Does not affect compatibility.Produce In BackupModeIf the unit is in backup mode, modifying this parameter will cause the production ofthe exchange to start if being set to TRUE and stop if being set to FALSE.If the primary unit is the active unit, modifying this parameter will have no immediateeffect.If the secondary unit is the active unit, modifying this parameter will cause anincompatibility because it changes the exchange ID.Note: If this option is set to FALSE for all exchanges in a system, this setting cannotbe modified in a run mode store. If at least one exchange has this setting asTRUE in the prior stop mode store, then this setting can be modified for otherexchanges in a run mode store.
