User Guide

FS-8700-127 Hanning & Kahl HCS-R Manual Page 10 of 17
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4.6. Map Descriptor Example: Read Data and Keep History
This Map Descriptor allows the storage of data history up to HCSR_Data_Stages. Data will be shifted to next Stage only if the data is changed. The driver divides the Data Array into sections corresponding to the number of HCSR_Data_Stages. Current data (stage1) will be stored in the first section and oldest (last stage) data will be stored in the last section in the Data array. Map_Descriptors Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, Node_name Length Scan_Interval, HCSR_Data_Stages CMD_DI_HCSR_01, DA_CURRENT, 0, RDBC, Node_A, 72, 5, 3 Map_Descriptors Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, Node_name Length HCSR_Onfrom HCSR_Loop HCSR_Data_Stages CMD_FromLoop_01, DI_FromLoop01, 0, Passive_Client, Node_A, 63, From 1 3 CMD_OnLoop_01, DI_OnLoop01, 0, Passive_Client, Node_A, 63, On 1 3 CMD_FromLoop_02, DI_FromLoop02, 0, Passive_Client, Node_A, 63, From 2 3 CMD_OnLoop_02, DI_OnLoop02, 0, Passive_Client, Node_A, 63, On 2 3 CMD_FromLoop_03, DI_FromLoop03, 0, Passive_Client, Node_A, 63, From 3 3 CMD_OnLoop_03, DI_OnLoop03, 0, Passive_Client, Node_A, 63, On 3 3 CMD_FromLoop_4, DI_FromLoop04, 0, Passive_Client, Node_A, 63, From 4 3 CMD_OnLoop_04, DI_OnLoop04,, 0, Passive_Client, Node_A, 63, On 4 3
Name one of the Data Array defined in Data_Array section to store data
Starting offset in Data Array to hold data
One of the Nodes declared in Client Node Section. This Node will be polled if Function is
RDBC
How often (in seconds) to poll target device. Irrelevant if Function is Passive_Client
Maximum number of placeholders for data storage.
RDBC will cause read poll and Passive_Client is used to store data returned by response.
The number of data stages (data changes) to be kept as history.