WattMaster WM-WCC3-TGD-01B - Manual (Page 832)

Internal Trend Logging
Internal Trend Logging
The Satellite Controller can maintain an Internal Trend Log, which
records a fi xed set of values at an interval programmed by the user. In
order to utilize these logs, a computer with WCC III front end software
installed must be able to communicate with the WCC III system.
The available options for Satellite internal trend logging are: Change of
State, Run Time Total, Analog Trend, and Analog Peaks. The Change of
State trend log can log the on time and date, and off time and date for up
to 8 binary points per Satellite. The Run Time Total trend log can log the
total accumulated on or off time in seconds, minutes, or hours of up to 8
binary points within the satellite controller. The total amount of on time
that can be accumulated without being reset is 9999 seconds, minutes,
or hours. The Analog Trend log can log the current analog value for up
to 8 analog points within the satellite. The timed interval for the Analog
Trend logging can be from 1 to 99 minutes, or from 1 to 99 hours. The
Analog Peaks trend log will record the time, date, and value of the Last
Low Peak and the time, date, and value of the Last High Peak for up
to 8 analog points.
On the Change of State and Analog Trend there are 48 log positions
available. Once the last (48th) position has been recorded, depending
on how the user programs the log, it can Roll (saving the latest and
deleting the oldest), or stop until the log is reset. This means the user is
required to retrieve the logs at an interval that is shorter than the dura-
tion of the last 48 logs. Shown below are some log intervals and the
duration of 48 logs.
1 Minute Interval ............................48 Minute Duration
15 Minute Interval ..........................12 Hour Duration
30 Minute Interval ..........................24 Hour Duration
60 Minute Interval ..........................48 Hour Duration
8 Hour Interval ...............................16 Day Duration
The items that can be logged in the log are listed below:
 Date (Automatic)
 Time (Automatic)
 Space Temperature (Analog Input “AX” with X = 1 to 8)
 Date and Time of latest High and Low Space Temperature
Peaks
 Cooling/Heating Demand (Data Register A (“RXA” with
X = 1 to 8)) Note: Depending on what software is being
used this point may read out as a whole number with no
decimal, examples: a 3.4 cooling demand will read out 34, a
2.5 heating demand will read out -25
 Supply Air Temperature (User programmable Global
Analog “GAXXX” with X = 1 to 256)
 Push Button Override Status (Logic Switch/Input “LX”
with X = 1 to 8)
 Airfl ow on Pressure Independent Terminal Units (Data
Register B (“RXB” with X = 1 to 8))
 Damper Position (Analog Output “PX” with x = 1 to 8)
On the SAT IIIF, there are additional points that can be logged:
 Current CO2 Level (Analog Input “AX” with X = 2, 4, 6,
or 8)
 Proportional Heat (Analog Output “PX” with X = 2, 4, 6,
or 8)
 Discharge Air Temperature (Data Register “RXA”
with X = 2, 4, 6, or 8)
 Supply Air Temperature (Data Register “RXB”
with X = 2, 4, 6, or 8)
 Current Operating Mode (Logic Switch/Input “LX” with
X = 2, 4, 6, or 8 for heating mode and X = 10, 12, 14, or 16
for cooling mode)
 Fan Status (Binary Output “OX” with X = 1, 3, 5, or 7)
 Box Heat Stages (Binary Output “OX” with X = 2, 4, 6, or
8 for relay #1 and X = 9, 11, 13, or 15 for relay #2)
For more information on Internal Trend Logging, see chapter 3 of the
WCC III manual.
Caution: These logs are subject to loss if a power outage
occurs because there is no battery-backed
memory on the VAV/Zone Controllers. These
values are stored on the Satellite controller and
its memory may only last up to 3 days.
28 VAV/Zone Controller Actuator Package Technical Guide
Sequence of Operations