Defining the starting condition (mon-start), Monitoring (+monstart & +mon1–+mon8), 1 defining the starting condition (mon-start) – SMA Sunny Boy Control User Manual
Page 120: Section 7.5, 5 monitoring (+monstart & +mon1–+mon8), Monitor start, Function, Activated, Chname, Valid min
Sunny Boy Control
SMA Technologie AG
User Manual
SUNBC-14:NE0206
116
7.5 Monitoring (+MonStart & +Mon1–+Mon8)
The monitoring function enables you to customize the monitoring to match your
needs. The
tolerance values for generating warnings and failures can be defined for
eight channels of the Sunny Boy Control Plus. As soon as this limit has been violated
for longer than the set length of time (refer to “Setup…System…Tolerances”), the
Sunny Boy Control Plus will generate a corresponding warning or error message.
These are treated like any other warning or error message by either switching the
alarm contact or faxing a report.
7.5.1 Defining the Starting Condition (MON-Start)
When the start condition (+MON-Start) is activated, error and warning messages for
the 8 monitoring channels +Mon1–+Mon8 are generated only if the starting condi-
tion is met.
Hardware-Based Configuration
[MONITOR START ]
Function…
Function of the monitor starting condition
…activated
deactivated,
activated
---------------Š
ChName…
Name of the channel to be monitored (the channel’s default unit
………+Gi
for the values below is displayed; here: W/m2)
Valid min…
……………200W/m2
Monitoring is active only if channel exceeds this value.
Valid max…
…………1300W/m2
Monitoring is active only if channel falls short of this value.
Error Low…???
…………………0W/m2
Error if channel falls short of this value (e.g., if line is broken)
Error High…???
…………1300W/m2
Error if channel exceeds this value
Fig. 7.21: Monitoring channel configuration
If you would like to monitor the efficiency of a PV system, note that, due to the char-
acteristic curve, a meaningful analysis is not possible during periods of low irradia-
tion. It is therefore recommended that you define an irradiation range in which to per-
form an analysis. This is possible by using an external irradiation sensor to take ana-
log measurements and by defining a valid value range of 200–1,300 W/m² under
+Mon-Start. To guarantee usable irradiation values, sensor values beyond the set
range (e.g., below 0 W/m² and above 1,500 W/m²) are defined as errors. If no