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FS-8700-19_Metasys_N2 Driver Manual Page 14 of 51
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com
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4.4.4. Map Descriptor Example 1 – N2Open
// Client Side Map Descriptors
Map_Descriptors
Map_Descriptor_Name, DA_Name, DA_Offset, Function,
MN2_Function
,
Node_name Address Data_Type Scan_Interval
AI_READ, DA_AI3, 0, RDBC, -, Node_A, 1, Ana_Input 5s
COS_POLLER, DA_COS, 0, COS_Poller, -, Node_A, -, -, 30s
AI_BY_COS, DA_AI3, 1, COS_Read, -, Node_A, 1, Ana_Input, -
BI_BY_COS, DA_BI, 3, COS_Read, -, Node_A, 2, Dig_Input, 10
AI_1_Release, DA_Release, 0, WRBX, Release, Node_A, 1, Ana_Input, -
Note:
To get change of state (COS) reports from an analog port, the warning/alarm levels need to be configured. If the alarm/warning
values are not known, then it would be better to configure an RDBC Map Descriptor which reads the analog input directly. Limits will
then not be required.
4.4.5. Map Descriptor Example 2 - VMA
// Client Side Map Descriptors
Map_Descriptors
Map_Descriptor_Name, DA_Name, DA_Offset, Function, MN2_Function, Node_name, Address, Data_Type, MN2_Type, Scan_Interval
AI_READ, DA_AI3, 0, RDBC, -, Node_VMA, 1, Ana_Input -, 5s
AO_WRITE, DA_AO, 0, WRBX, -, Node_VMA, 3, Ana_Output, -, 30s
AO_Release, DA_AO, 0, WRBX, Release, Node_VMA, 3, Ana_Output, -, -
Special_type, DA_DRV, 10, RDBC, -, Node_VMA, 23, Driver, 5, 10s
Normal read Map Descriptor.
Note RDBC function,
Data_Type and Address
specification.
COS_Poller Map
Descriptor. This only
specifies the
Function, Node and
Scan_Interval.
COS_Read Map
Descriptor sets point type
the same as normal read
Map Descriptor. Optional
scan_interval.
Release function used in conjunction with
wrbx. If the Data Array value specified in this
Map Descriptor is changed, then a Release
command is sent to the specified point.
Override release function configured as wrbx. Driver type 5 (ADF) configured here.