Ct Monitor Method Switching (Buffer Memory Address: B0 H ); Manipulated Value; (Mv Value, 0 To 4000/0 To 12000/0 To 16000, Buffer Memory Address: B1 H To B4 H ); Manipulated Value Resolution Switching (Buffer Memory Address: B5 H ) - Mitsubishi Electric MELSECSystem Q User Manual

3 SPECIFICATIONS
3.5.44 CT monitor method switching (buffer memory address: B0

3.5.45 Manipulated value

(MV value, 0 to 4000/0 to 12000/0 to 16000, buffer memory address: B1
3.5.46 Manipulated value resolution switching (buffer memory address: B5
3.5.47 Auto tuning mode selection (buffer memory address: B8
3 - 46
(1) Sets the method of making heater current measurement.
Choosing the ON current/OFF current measures the present current value of the
CT.
Choosing the ON current holds (retains) the previous heater ON-time current
value when the heater is OFF.
• 0: ON current/OFF current (default)
• 1: ON current
(1) Stores the value of the manipulated value at the buffer memory address (D
10 ) to be output to the digital-to-analog converter module.
H
(2) The value stored is in the range 0 to 16000.
(3) When the equipment to be heated or cooled is analog input equipment, output the
manipulated value to the digital-to-analog converter module to convert it into an
analog value.
(1) Choose any of the following three different resolutions for the manipulated value
(buffer memory address: B1
• 0: 0 to 4000 (default)
• 1: 0 to 12000
• 2: 0 to 16000
According to the controlled object to be used, choose the auto tuning mode from the
"standard mode" and "fast response mode".
The standard mode is compatible with almost all controlled objects.
(1) Standard mode
This mode is compatible with almost all controlled objects. This mode is
especially effective for controlled objects which give an extremely slow response
or which may be affected by noise or interference.
For the controlled object where either the ON or OFF time during auto tuning is
about only 10 seconds, slow-response (low-gain) PID constants may be
calculated. In this case, fast-response PID constants can be calculated by
executing auto tuning in the fast response mode.
(2) Fast response mode
This mode calculates faster-response (higher-gain) PID constants for the
controlled object which gives a fast response where the ON or OFF time during
auto tuning is about only 10 seconds.
Note that the gains of the calculated PID constants may become so high that the
control temperature (PV) may oscillate near the set value (SV). In this case,
execute auto tuning in the standard mode.
POINT
(1) If auto tuning mode selection is performed using the utility package, Version
1.10L or a subsequent product version is necessary.
(2) Error code 2 (A value other than 0 was input to the restricted area.) occurs if the
high response mode is set for a function version A unit. Set the standard mode.
H
to B4 ).
H H
to BB
H
MELSEC-Q
)
to B4
H
)
H
)
H
)
H
to
H
3 - 46