ProSoft Technology MVI69-EGD - Manual (Page 30)

MVI69-EGD ♦ CompactLogix or MicroLogix Platform Configuring the MVI69-EGD Module
GE Ethernet Global Data Communication Module
Page 30 of 96 ProSoft Technology, Inc.
November 3, 2008
2.4.5 Swap Code
0, 1, 2 or 3
The Swap Code field sets byte and word swapping of data produced or
consumed. Swapping of words and/or bytes in the message may be required for
different protocol and operating systems as their representation of multi-byte
values may not be the same as that of the EGD protocol.
Swap Code Description
0 None - No Change is made in the byte ordering (1234 = 1234)
1 Words - The words are swapped (1234=3412)
2 Words & Bytes - The words are swapped then the bytes in each word are
swapped (1234=4321)
3 Bytes - The bytes in each word are swapped (1234=2143)
2.4.6 P/C Time
The P/C Time field defines the number of milliseconds between productions of
the exchange data and for consumed exchanges. This value defines the number
of milliseconds to wait for a produced exchanged before a timeout condition is
present.
ƒ For a producer exchange it defines the number of milliseconds between
consecutive producer exchanges.
ƒ For a consumer exchange it defines the number of milliseconds to wait for a
produced message before a timeout error is set. It is suggested to use a
value at least four times greater than the value used in the producer
exchange.
For consumed messages, set this value to approximately 4 times the produced
time of the exchange on the other device. This will prevent the exchange from
constantly timing out on a busy network. If this parameter is set to zero, the
message will not be produced.
A zero value for a consumed message indicates that the exchange will never
timeout. The zero value can be used for exchanges that will interface with the
command service port (7937) to handle data read and write requests from
another device.
2.4.7 IP Address
The IP Address field should be set to the IP address of destination device
(produced data) or source device (consumed data).
Producer Exchange IP address: If the cast type is set to 'U' for a produced
exchange, the address should be set to IP address of the specific node to
receive (consume) the data. If the cast type is set to 'B' for produced data, set the
IP to either a network (255.255.255.255) or subnet (192.168.0.255) broadcast
address. If the cast type is set to 'M' for produced data, set the IP address to a
valid multicast address.