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ATTRIBUTES EXCEL 50/100/500/600/800
EN2B-0092GE51 R0512 36
VALUE
TIME
TREND CYCLE
TREND
VALUE
TREND
VALUE
TREND
VALUE
TREND CYCLE
Fig. 22. The attribute "Trend Cycle"
The value of the attribute "Trend Cycle" is given in minutes, and the valid range is 0
to 1440 min (=24 hours). A trend cycle value of 0 will disable time-based trending
(this is the default) and value-hysteresis trending is used if the trend log attribute is
set. The value for the attribute "Trend Cycle" can be changed via the MMI, C-Bus,
or modem connection to EBI/SymmetrE, and also via CARE RIA/WIA statements.
NOTE If the attribute "Trend Cycle" is set to anything other than 0, trending will
be time-based and the attribute "Trend Hysteresis" will be ignored.
User Address
The attribute "User Address" is a sequence of up to 18 letters and numbers
assigned to each datapoint (physical and pseudo).
Example The temperature of a room is recorded at a sensor input; the associated user
address could be as follows:
Room Temp.1.10 (Room temperature, 1st floor, room 10)
The datapoint can be accessed directly by selecting this user address on the XI581
(not with XCL5010, Excel 100C), XI582, and XL-Online operator interfaces or the
XL50-MMI.
In the case of basic types of physical data, a user address always corresponds
exactly to one technical address (see Table 15).
The user address of flexible datapoints may refer to up to six technical addresses.
Table 15. Number of technical addresses for flexible datapoints
flexible datapoint
number of technical addresses
Pulse 2 2
Multi-stage up to 6
Feedback up to 6 (in pairs of 2)
Value
When the controller is working in automatic (the attribute "Operating Mode" is set to
"Auto"), the value currently being processed by the program, or the current status,
can be found in the attribute "Value". The attribute "Value" for an analog input could
contain, for example, the current room temperature of 21 °C / 70 °F.
A pump switched by a digital output could contain the current status of the pump,
for example ON, in its attribute "Value".