Data Acquisition; Trend - Siemens Synco 700 RMZ785 Basic Documentation

Purpose
Example
Contents
Change between views
Note
Siemens
Building Technologies
6

Data acquisition

6.1

Trend

6.1.1 Connections and application
Trend
 Use the Trend function block for time-related recording of measured values. It
provides 4 independent trend channels.
 A trend channel can record one measured value.
 Two trend channels can be displayed for each Trend view:
Primary channel and extra channel (as reference).
 It is possible to record signals from local inputs of RMS705B as well as room
temperatures and outside temperature via bus.
6.1.2 Views
The following illustration shows a 24-hour view on the operator unit with primary
trend curve and reference curve for an extra channel:
 The current 24-hour views (8 minutes, 8 hours, 24 hours) show the date and the
current value of the primary trend curve.
 The primary trend curve is shown as a solid line, the reference curve as a dotted
line.
 The Y-axis label refers to the settings of the primary channel. If the Y-axes of the
two channels do not match, a warning symbol appears next to the axis.
Use the press-and-turn button on the operator unit to navigate between the four
different views:
 8-minute view:
Sampling every 5 seconds, last 8 minutes.
 8-hour view:
Sampling every 5 minutes, last 8 hours.
 24-hour view:
Sampling every 15 minutes, current day.
 Rolling over the last 6 days: Sampling every 15 minutes, last 6 days.
The 24-hour view shows the last 6 days.
Switching and monitoring device RMS705B
Data acquisition
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CE1P3124en
01.04.2010