8-3
8.3 Positioning Control Alarm (
ero
)
Table 8.6 Positioning Control Alarm Specifications
Alarm code
Descriptions
•
When the protective function detects an undervoltage during operation in positioning
control, it issues this alarm. This alarm is contained in alarm category "Y" in Table
8.1, so it cannot be disabled by any function code.
ero
•
This protective function recognizes a PG error by software based on the position
pulse feedback status against its output frequency.
•
This alarm occurs if:
(1)
The position pulse input count does not change when the inverter output
frequency has exceeded the hysteresis width (specified by E30 Frequency
Arrival, for 2.5 Hz min.) during the period longer than the timer setting specified
by o18.
(2) The polarity is being incongruent between the inverter output frequency and
feedback position pulse when the inverter output frequency has exceeded the
hysteresis width (specified by E30 Frequency Arrival, for 2.5 Hz min.) during the
period longer than the timer setting specified by o18.
•
If the o18 data (Excessive speed deviation timer is set to 0.0 s (Disable detection),
however, any alarm will not occur in both cases (1) and (2). This alarm is contained
in alarm category "C" in Table 8.1.
8.3.1 Function
codes
Table 8.7 lists function codes related to positioning control alarms.
Table 8.7 Related Function Codes
Code
Name
Data setting range
Unit
Default
setting
Change
when
running
o18
Excessive Speed Deviation Timer
0.0 to 10.0
s
0.5
Y
E30
Frequency Arrival
(Hysteresis width)
0.0 to 10.0
Hz
2.5
Y
J88
Positioning Control
(Position detection direction)
0: Forward direction
1: Reverse direction
(Inverts the current direction
(x -1))
- 0 N
Alarm (2) in Table 8.6 could occur due to wrong wiring of the PG. Using J88 can correct
the direction without rewiring.
Содержание FRENIC-Multi Series
Страница 38: ...MEMO...
