FieldServer FS-8700-103 - Manual (Page 9)

FS-8700-103_ATMI_TGM_Serial Manual Page 9 of 28
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4.4. Client Side Map Descriptors
4.4.1. FieldServer Related 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 “Data Array”
section above
Data_Array_Offset Starting location in Data Array
0 to maximum specified in
“Data Array” section above
Function
Function of Client Map
Descriptor. The driver cannot
write to the TGM device.
RDBC, ARS
4.4.2. Driver Related Map Descriptor Parameters
Column
Title
Function Legal Values
Node_Name Name of Node to fetch data from
One of the node names specified in
“Client Node Descriptor” above
Data_Type This commonly used driver parameter is not used by the driver.
Length
Length of Map Descriptor
The parameter is not used by
the driver but is used by the
FieldServer Kernel to reserve
space in the Data Array.
Set the Length according to the
function.
QIR Report: Length = 100
CALR Report: Variable. Depends on
number of gases reported in CALR
report. Start with a length of 100 and
increase if necessary.
QLA Report:
If the config has no sensors and port
x is the max port number, then make
the array (x+1) * 10 elements long
If the config has any sensors and
sensor x is the max sensor number
then make the array 200 + (x+1) *
10 elements long
Address This commonly used parameter is ignored by the driver.
4.4.3. Timing Parameters
Column Title Function
Legal
Values
Scan_Interval
Rate at which data is polled
For CALR report use a long interval (600s) as the TGM
configuration seldom changes.
Set the Scan_Interval for the QLA and QIR reports to zero
to have the driver poll for this data as often as possible.
≥0.001s