7. WEB Control Application
7-35
to 60[%], the final line speed command becomes 70[%].
A. When WEB_44 PID Type is “Fixed”, the final line speed command is;
Final Line Speed Command [%] = Line Speed Command [%] + PID Output [%]
When WEB_44 PID Type is set to “Proportional”, PID output is generated in proportion with the line speed
command. That is, the final line speed command is the sum of line speed command and the PID output in
proportion with the line speed command. For example, if the speed command is 50[%] and PID output is 10[%],
the final line speed command becomes 55[%]. In this case, the line speed command is larger than the set value of
WEB_45 Min FPID.
B. When WEB_44 PID Type is “Proportional”, the final line speed command (in case of line speed command
> WEB_45 Min FPID) is;
100
[%]/100 Command Speed Linex [%]Output PID
[%] Command Speed Line [%] Command Speed Line Final +=
In case of initial operation, the system should maintain the tension of web starting with initial web tension and 0[%]
speed command in possession. In the above formula, if the line speed command is 0[%], the final line speed
command becomes 0[%], where the tension of web cannot be maintained. Accordingly, to maintain the tension of
web, if the line speed command is less than WEB_45 Min FPID, the final line speed command under the following
formula can be applied.
C. When WEB_44 PID Type is “Proportional”, the final line speed command (In case of line speed command
< WEB_45 Min FPID) is;
100
45_%][Output
[%] Command Speed Line [%] Command Speed Line Final
WEBPID ×
+=
Function
Code
Loader Display Name of Function Set Range Unit
Factory
Default
WEB_44 PID Type PID Controller Type Setting
0 (Proportional)
1 (Fixed)
0 (Proportional)
WEB_45 Min FPID Minimum PID Output Setting 0.0 ~ 50.0 % 10.0
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