Ethernet Global Data; The Frequency Of Sending/Receiving An Exchange; The Consumer Update Timeout Period - GE VersaMax PLC User Manual

13.4 Ethernet Global Data

254 GFK-1503E
For public disclosure
Ethernet Global Data is data that is automatically sent from one Ethernet device to one or
more others. Once Ethernet Global Data has been configured, the data is sent
automatically during system operation. No program interaction is necessary to produce or
consume the global data.
The device that sends the Ethernet Global Data is called the producer. Each device that
receives Ethernet Global Data is called a consumer. Each unique Ethernet Global Data
message is called an exchange.
PLC1 - Producer
P
Exchange
Ethernet Global Data provides simple, regular communication of data
between devices. It should not be used for event notification if possible loss
of data would be significant.
VersaMax CPU IC200CPUE05 can be configured for up to 32 produced Ethernet Global
Data exchanges (total of Produced and Consumed) s. Each Ethernet Global Data
exchange must be configured individually for each PLC and consists of one or more data
ranges. See chapter 6 for configuration information.
13.4.1 The Frequency of Sending/Receiving an
Exchange
During configuration, the repetition period of each Ethernet Global Data exchange is set
up for the producer. The range is 10 milliseconds to 1 hour, which is selectable in
increments of 10 mS. It is not necessary to produce and consume data faster than the
application requires. This reduces the load on the network and on the devices, providing
capacity for other transfers.

13.4.2 The Consumer Update Timeout Period

As part of the configuration for each consumed exchange, a "timeout period" can be set
up for the exchange. The CPU reports an error if the first or subsequent packet of data has
not arrived within the specified time. The range is 0 for no timeout detection, or 10 to
3,600,000 milliseconds. The consumer's timeout period should be greater than the
producer's repetition period. GE recommends that the consumer timeout be set to no
lower than twice the production period,
PLC2 - Consumer
C
Ethernet Network
VersaMax PLC User Manual