Curve Access - Hitachi Abb Rvt Installation Und Betriebsanleitung

6.2.5.

Curve access

6.2.5.1. CommandClient_RequestCurveEx (future use)
This function makes a request to get a curve available.
Wanted curve is identified by their Source ID.
One must have at least Monitor rights to perform this task.
The curves will be too big to be retrieved with a single command. As a consequence, the data will be split in chunk.
The server is specifying the size of those chunks and is warning the client of how many of those chunks will need to
be transferred to get the complete curve.
It has the following prototype:
int CommandClient_RequestCurveEx(int
The CurveDescriptor is made out of the NumberOfChunks and ChunkSize as defined in the protocol.
The Trigger Value to be used is here provided as a string and is converted by the DLL to the type specified by Trigger-
Value_Type.
It can take some time between the moment of the request and the time where the first data gets available.
IMPORTANT NOTE:
– Number of periods is "1" by default
– Trigger function is reserved for future use : "0" by default
6.2.5.2. CommandClient_RequestCurve
This is a simplified version of the CommandClient_RequestCurveEx command where triggering is disabled.
It has the following prototype:
int CommandClient_RequestCurve(int
6.2.5.3. CommandClient_ReleaseCurve
This function is telling the RVT to stop getting data for the given curve.
If the curve was requested by a single client, the curve is not made available anymore for the client and the slot is
freed.
STATUS
Approved
unsigned char
unsigned char
int
int
unsigned char
unsigned char
char
int
unsigned char
int
SECURITY LEVEL
Public
SourceID,
NumberOfPeriods,
TriggerEnable,
TriggerSource_ID,
TriggerSource_Offset,
TriggerComparator,
TriggerValue_Type,
*TriggerValue_ValueString,
*CurveDescriptor);
SourceID,
NumberOfPeriods,
*CurveDescriptor);
DOCUMENT ID
9AKK106713A9758
RVT CO MM UNI CATI O N
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