GE PACSystems RX7i, User Manual

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Chapter 5. Ethernet Global Data
90 PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual GFK-2224Q
Effects of Modifying Consumed Exchange Parameters
For 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 the
producer to restore compatibility.
Parameter Behavior
Producer ID Redefines the exchange. Causes a major signature change in the producer. Exchange
will 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 page
73.
Exchange ID Redefines the exchange. Causes a major signature change in the producer. Exchange
will 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 compatibility
To any EGD Class 2 device sending commands that operate on this exchange, it will
appear that the exchange has been deleted. The Class 2 device must be updated to
direct the commands to the IP address of the adapter where the exchange has been
moved.
Update Timeout Modifies existing exchange. Does not affect compatibility. Note that decreasing a
consumed exchange’s update timeout without updating the corresponding
producer’s production period may cause timeouts.
Effects of Modifying Produced Exchange Parameters
Parameter Behavior
Exchange 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 affect
compatibility.
Destination Type Determines the consumer(s) of the exchange and may affect compatibility. For
details, 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 Backup
Mode
If the unit is in backup mode, modifying this parameter will cause the production of
the 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 immediate
effect.
If the secondary unit is the active unit, modifying this parameter will cause an
incompatibility because it changes the exchange ID.
Note: If this option is set to FALSE for all exchanges in a system, this setting cannot
be modified in a run mode store. If at least one exchange has this setting as
TRUE in the prior stop mode store, then this setting can be modified for other
exchanges in a run mode store.