7. WEB Control Application
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7.7.9 WEB Break Setting
1) WEB_48 WB Enable : WEB Break Detection Function Setting
2) WEB_49 INV WB Delay : Setting of Delayed Time until WEB Break Detection after Inverter
Operation
3) WEB_50 WB Delay : Delayed Time in WEB Break Detection
4) WEB_51 WB Level : WEB Break Detection Level
In the web control mode, the web is broken if it has tension it can bear. In this case, if the system continues the
web control without such breakage of the web detected, it may cause more serious accident. Accordingly, the
inverter is set so as to force the output of PID controller to be “0” when the web breakage is detected, when the
diameter computation is not carried out. Furthermore, if one of multi-function output DIO_41 AX1 Define ~ DIO_43
OC1 Define of the inverter is set to “WEB Break”, it lets out the output contact point showing the state of
“‘breakage”. In WEB_48 WB Enable mode, you can set WEB Break Detection function. If it is set to “Yes”, please
set the multi-function output and conduct its connection so that the higher-level controller can receive the output.
In case of WEB_49 INV WB Delay, for a certain period of time from the moment the inverter received the
operation command, it has lower value of tension feedback, and accordingly it can be misjudged as web break. This
is the function, for such situation, not to detect the web break for a certain period of time set in WEB_49 INV WB
Delay since the moment the inverter has started the operation. There exists a number of noises in the actual site,
and because of such external factor, the amount of feedback less than the set value can be posted at some
moment in WEB_51 WB Level, which can be judged as WEB Break. Therefore, WEB_50 WB Delay sets WEB Break
Detection Delayed Time. WEB_51 WB Level is the code to set WEB Break Detection Level where the amount of
tension feedback is set in [%] value.
Function
Code
Loader Display Name of Function Set Range Unit
Factory
Default
WEB_48 WB Enable
WEB Break Detection Function
Setting
No
Yes
No
WEB_49 INV WB Delay
Delayed Time until Web Break
Detection after Inverter Operation
0.1 ~ 600.0 sec 1.0
WEB_50 WB Delay
Delayed Time in WEB Break
Detection
0.1 ~ 600.0 sec 1.0
WEB_51 WB Level WEB Break Detection Level 0.0 ~ 100.0 % 0.0
WEB Break Block Diagram
X
X > Y
Tension Feedback
Run Command
WB Level (WEB_51)
WEB_50
Y
0
WB Enable (WEB_48)
WEB_49
WEB Break
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