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FS-8704-12_GE-EGD Manual Page 9 of 26
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Column Title Function Legal Values
The following keywords apply only to the GE-EGD protocol.
ge_producerId
This identifies the GE device producing the
EGD data. Although in decimal dot format, it
is not an IP address and does not necessarily
correspond to the IP address of the GE-
Ethernet port producing the message. It
corresponds to the producer ID configured for
the CPU producing the data.
The default value is typically the same as the
IP address of the producer but the value can
be changed and it is possible for one device
to have multiple Ethernet interfaces and
hence multiple IP addresses.
Any change to the producerID must be
matched by a similar change in the
consumer's configuration.
Nnn.nnn.nnn.nnn
Where nnn are in the
range 0-255.
ge_exchangeId
Used with the the producerID, to uniquely
identify a packet of EGD data. Thus, this
driver uses these two parameters to match a
produced data packet with one or more
passive Map Descriptors.
Integer values >= 1
ge_data_type
Each produced data packet contains raw
packed data. Nothing in the message
identifies the structure or type of the incoming
data. The Driver therefore cannot
differentiate between byte, integer, real ...
numbers and requires the specification of this
keyword to unpack the data buffer.
Byte, Bit, Word,
Dword, Int , Long
Float (4 byte IEEE real
number) or Double (8
byte IEEE real
number).
ge_offset
If the producer has been configured to
produce data of multiple types in one data
packet then you will need multiple Map
Descriptors to decode them. The ge_offset is
used to point to the first byte in the data
packet to be processed by the Map
Descriptor. Typically the Map Descriptor for
the 2nd, 3rd ... Map Descriptors associated
with one data packet will be non-zero.
Zero, Any positive
integer