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MA7200 PLUS Operating Manual
TECO – Westinghouse Motor Company P3-07 - P3-09
.
Parameter Details
The Load Loss Detection Level can be set by Multi –function Analog Input parameter Sn-29 (AUX Function)
when it is set to 16
or
by P3-01 Load Loss Det. Level, when Sn-29 is
≠
16.
Note: When Sn-29 is set to =16 (Aux Function), the load loss level is determined by the analog value applied
to the AUX input terminal and parameter P3-01Load Loss Detect Level is invalid.
P3-01 Load Loss Detect Level is set as a percentage of inverter rated current. When Sn-29 = 16, the Load Loss
Detect Level is determined by the voltage applied to the AUX input terminal as shown in Fig. 9.2.4.6 below.
10V
Multi-function
Analog Input
Inverter Rated
Output Current
0V
0%
200%
Fig. 9.2.4.6 Load Loss Detect Level Set by AUX Input
When the inverter output current falls below the Load Loss Detect Level for a time exceeding the programmed
Load Loss Detect Time P3-02, the inverter status will be as set by parameter P3-03 Load Loss Action as shown in
the following table 9.2.4.5. Also, if any of the Multi-Function Outputs Sn-30 (Relay), Sn-31 (DO1), or Sn-32 (DO2)
are set to =24 (Load Loss Detect), that output will be turned ON.
Table 9.2.4.5 Inverter Status vs. P3-03 Value
P3-03
Value
Inverter Status while
Load Loss
Message
while Load Loss
0 Continue
Running
----
1
Continue Running
Load Loss Alarm
2
Shut Down
Load Loss Fault
Below Fig. 9.2.4.6 shows a block diagram and graph illustrating the Load Loss Detection Function.
Inverter output current
Load Loss
Detection Level
Source
P3 – 02
Load Loss
Detection Time
P3 – 03
Load Loss
Action
=1 Load Loss
Alarm
=2 Load Loss
Fault
Terminal AUX
P3 - 01
Sn-29
≠
16
or
Sn-29 = 16
Load Loss
Detect Digital
output select
Relay
(Sn-30=24)
DO1
(Sn-31=24)
DO2 or
R2 Relay
(Sn-32=24)
=1 Load Loss
Alarm
=2 Load Loss
Fault
Motor
Current
P3-01
Hysteresis width
5%
ON
ON
P3-02
P3-02
Load Loss
Detection
Signal
Fig. 9.2.4.6 Load Loss Detection Function