FieldServer FS-8704-12 - Manual (Page 12)

FS-8704-12 GE-EGD Driver Manual Page 12 of 23
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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 Specific Map Descriptor Parameters
Column Title Function Legal Values
Map_Descriptor_Name Name of this Map Descriptor Up to 32 alphanumeric characters..
Data_Array_Name
Name of Data Array where data is to be
stored in the FieldServer One of the Data Array names from
Section 4
Data_Array_Location Starting location in Data Array
0 to (Data_Array_Length-1) as specified
in Section 4
Function Function of Client Map Descriptor Wrbc
6.3.2 Driver Specific Map Descriptor P arameters
Column Title Function Legal Values
Node_Name Name of Node to fetch data from
One of the Node
names specified in
Section 6.2.
Length Length of Map Descriptor 1 - 1000
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
This and the producerID uniquely identify a packet of EGD data. Thus,
the consumer uses these two parameters to update. Any change to
the exchangeID must be matched by a similar change in the
consumer's configuration.
Integer values >= 1
Ge_data_type
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
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.
Refer to Appendix C.1.
6.3.3 Timing Parameters
Column Title Function Legal Values
Scan_Interval Rate at which data is produced. This is the equivalent of the producer interval. >0.1s