Table of Contents
Advertisement
FS-8704-12 GE-EGD Driver Manual
6.3
Server Side Map Descriptors
Only one Map Descriptor may be configured for each ExchangeID. Each produced exchange is thus limited to one
data type and to data from one Data Array. This is different from the configuration of consumer Map Descriptors.
6.3.1 FieldServer Specif ic Map Descriptor Parameters
Column Title
Map_Descriptor_Name
Data_Array_Name
Data_Array_Location
Function
6.3.2 Driver Specific Map Descriptor P arameters
Column Title
Function
Node_Name
Name of Node to fetch data from
Length
Length of Map Descriptor
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.
Ge_ProducerId
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.
This and the producerID uniquely identify a packet of EGD data. Thus,
the consumer uses these two parameters to update. Any change to
Ge_exchangeId
the exchangeID must be matched by a similar change in the
consumer's configuration.
Each produced data packet contains raw packed data. This keyword is
used to tell the driver how to pack the data into the message. Thus
data can be read from a BIT array in the FieldServer and sent as words
Ge_data_type
for storage in %R (register memory) in the GE-PLC. Any change to the
data type must be matched by a similar change in the consumer's
configuration.
6.3.3 Timing Parameters
Column Title
Function
Scan_Interval
Rate at which data is produced. This is the equivalent of the producer interval.
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.fieldserver.com
Tel: (408) 262 2299 Fax: (408) 262 2269 Toll Free: (888) 509 1970 email: support@fieldserver.com
Function
Name of this Map Descriptor
Name of Data Array where data is to be
stored in the FieldServer
Starting location in Data Array
Function of Client Map Descriptor
Page 12 of 23
Legal Values
Up to 32 alphanumeric characters..
One of the Data Array names from
Section 4
0 to (Data_Array_Length-1) as specified
in Section 4
Wrbc
Legal Values
One of the Node
names
Section 6.2.
1 - 1000
Nnn.nnn.nnn.nnn
Where nnn are in the
range 0-255.
Integer values >= 1
Refer to Appendix C.1.
Legal Values
>0.1s
specified
in
Advertisement
Table of Contents
