Hitachi SJ Series, User Manual

Page: 360 / 786

12-16-11
Chapter 12 Inverter Function
12.16.8 Detecting speed deviation error
•
How to check whether the system is operating as
specified
•
How to display an error signal when the motor is
not operating as specified.
•
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.
Parameter
•
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.
Item Parameter Data Description
Operation for speed
deviation error
[bb-82]
00
Turns on the output terminal function 041
[DSE].
01
Turns on the output terminal function 041
[DSE], and trips with [E105] Speed
deviation excessive error.
Speed deviation error
detection level setting
[bb-83] 0.0~100.0(%)
Sets the level at which the speed deviation
is judged as excessive.
Speed deviation error
detection time
[bb-84] 0.0~5.0(s)
Sets the time to judge the deviation to be an
error after it has excessively increased.
Detected frequency
monitor
[dA-08]
-590.00~
590.00(Hz)
Displays data obtained through encoder
feedback.
Output frequency
monitor
[dA-12]
-590.00~
590.00(Hz)
Displays the frequency command given by
the inverter.
Q
Ａ
!
Speed
deviation
Output terminal
function [DSE]
bb-83
0
bb-83
bb-84 bb-84
bb-84