Configuring A Global Data Exchange For A Consumer - GE VersaMax PLC User Manual

6.5 Configuring a Global Data Exchange for a Consumer

Parameters
The address that uniquely identifies the CPUE05 as an Ethernet Global Data device across the
Local Producer ID
network. The default is the same as the IP address of the CPUE05. The default can be changed.
A number that identifies that specific data exchange. It must match the Exchange ID specified in the
Exchange ID
produced exchange (in the sending device).
Adapter Name Always 0.0 for CPUE05
The Local Producer ID of the device sending the exchange. For more information about groups, click
Producer ID
the Group Usage button above.
Used only if the same data is consumed by more than one consuming device. Enter the same Group ID
Group ID that has been configured as the Consumer Address in the producer device. For more information about
groups, click the Group Usage button above.
Consumer Period Not used. Default is 200mS.
The maximum time the Ethernet interface allows between seeing samples on the network without
reporting a refresh error status. This error status means a first or subsequent packet of data has not
arrived within the specified time. The range is 0, or 10–3,600,000 milliseconds. The value should be at
least double the producer's producer period value. The default is 0, which disables timeout detection.
Update Timeout The update timeout period should be greater than the exchange production period. (A value at least
twice the production period is recommended.)
Round this value to the nearest 10 milliseconds before you enter it. The update timeout has a resolution
of 10 milliseconds. If you enter a value such as 22 milliseconds, the actual update timeout will be
rounded up to 30 milliseconds.
A data range that identifies the memory location where the status value for the consumed exchange will
be placed. Refer to chapter 13,
Status Word
Status Word address must be unique; it is not automatically assigned the next highest address.
Offset
example:
Status
A data range that identifies the memory location where the timestamp of the last data packet will be
placed. The timestamp is not an actual date; it is an 8-byte value representing the time elapsed since
midnight, January 1, 1970. The first four bytes contain a signed integer representing seconds and the
next four bytes contain a signed integer representing nanoseconds. This value represents the time in
the producer when the data sample originated. It can be examined to determine if a new packet
received from the network has a new data sample or if it is the same data received previously.
Time Stamp The timestamp information produced by the PLC currently has a resolution of 100 microseconds if no
network synchronization is used. If NTP is used to perform network time synchronization, the
timestamp information has a resolution of 1 millisecond and has ±10 millisecond accuracy between
PLCs on the same LAN.
NTP may be enabled in the configuration of the CPUE05. Once NTP time synchronization is
configured, the CPUE05 will synchronize itself to an external NTP time server if one exists.
(This feature is supported in IC200CPUE05-HK and previous versions only.)
Offset
example:
Time Stamp
Ethernet Configuration
For public disclosure
To receive a Global Data Exchange, configure the following information:
Ethernet Communications
Reference Low Point
%R 99
Reference Low Point
%R 91
Description
for details of the status value. Note that the
High Point Description
Status: Where the PLC will place the
99
status data.
High Point Description
Time Stamp: Optional place for the PLC
94
to put the timestamp.
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