Tight Shut/Full Open Function - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

Tight shut/full open function

To use the tight shut/full open function with a module that has the extended mode in the range setting, set the extended mode
in the output range setting.
To use the tight shut/full open function with a module that does not have the extended mode in the range setting, set 0 to
20mA and 0 to 5V in the range setting and set the output conversion high/low limit values of the two-degree-of-freedom
advanced PID control FB again.
When 4 to 20mA and 1 to 5V are regarded as a standard, only the tight shut (full open when MV reverse is
valid) is applied since the upper limit side can output up to 100% (20mA, 5V) with output range setting of 0 to
20mA and 0 to 5V.
The following table shows a setting example for the two-degree-of-freedom advanced PID control FB when the signal of 4 to
20mA is regarded as a standard, tight shut output value is set to -20% (0.8mA).
For the analog module, set 0 to 20mA for the output range setting and 0 to 32000 for the resolution.
Item
Output Conversion High Limit
(OUT3_NMAX)
Output Conversion Low Limit
(OUT3_NMIN)
Tight Shut/Full Open Execution condition
(OUT3_FOTS_EN)
Output Value for Full Open (Unit: %)
(OUT3_MVFO)
Output Value for Tight Shut (Unit: %)
(OUT3_MVTS)
Setting value
32000.0
6400.0
TRUE
100.0
-20.0
Remarks
Equivalent to 20mA
Equivalent to 4mA

100%, since 20mA or more cannot be output.
Equivalent to 0.8mA
Appendix 3 Related Functions of Process
A
APPX
617