Hitachi SJ Series User Manual page 360

Chapter 12
12.16.8 Detecting speed deviation error
Q
How to check whether the system is operating as
•
specified
How to display an error signal when the motor is
•
not operating as specified.
Ａ
The speed deviation error detection function
•
judges that the deviation is excessive if the
deviation between the frequency command and
the feedback speed becomes large.
This function operates when other than "0.0" is
•
specified for [bb-83] Speed deviation error
detection level setting.
Speed
0
deviation
Output terminal
function [DSE]
Parameter
Item
Operation for speed
deviation error
Speed deviation error
detection level setting
Speed deviation error
detection time
Detected frequency
monitor
Output frequency
monitor
bb-84 bb-84
Parameter Data
00
[bb-82]
01
[bb-83] 0.0~100.0(%)
[bb-84] 0.0~5.0(s)
-590.00~
[dA-08]
590.00(Hz)
-590.00~
[dA-12]
590.00(Hz)
12-16-11
!
To use this function, speed feedback by the
•
encoder is required.
Speed deviation is the difference between [dA-12]
•
Output frequency monitor and [dA-08] Detected
frequency monitor.
When the absolute value of speed deviation has
•
exceeded [bb-83] Speed deviation error detection
level and [bb-84] Speed deviation error detection
time has elapsed, it is judged as a speed deviation
error.
If "00: Warning" is specified for [bb-82] Operation
•
for speed deviation error, the inverter turns on the
Output terminal function 041 [DSE] with a speed
deviation error.
If "01: Error" is specified for [bb-82] Operation for
•
speed deviation error, the inverter turns on the
Output terminal function 041 [DSE] with a speed
deviation error, and trips with [E105] Speed
deviation excessive error.
bb-83
bb-83
bb-84
Description
Turns on the output terminal function 041
[DSE].
Turns on the output terminal function 041
[DSE], and trips with [E105] Speed
deviation excessive error.
Sets the level at which the speed deviation
is judged as excessive.
Sets the time to judge the deviation to be an
error after it has excessively increased.
Displays data obtained through encoder
feedback.
Displays the frequency command given by
the inverter.
Inverter Function