Functional Comparison - Mitsubishi Electric MELSEC L Series Manual

5
HEATING-COOLING TEMPERATURE CONTROL MODULE/TEMPERATURE

5.3 Functional Comparison

Item
Auto tuning function
Self-tuning function
Forward action/reverse action selection function
RFB limiter function
Sensor correction function
Unused channel setting
PID control forced stop
Heater disconnection detection function
Output off-time current error detection function
Loop disconnection detection function
2
Data storage in E PROM
Alert function
Output setting at CPU stop error
Control function
Simultaneous temperature rise function
Peak current suppression function
Temperature conversion function (using unused
channels)
Temperature process value (PV) scaling function
Error history function
Module error history collection function
*2
Error clear function
Cooling method setting function
Heating-
Overlap/dead band function
cooling control
Temperature conversion function
(using unused channels)
5
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The temperature control module automatically sets the optimal PID constants.
The temperature control module constantly monitors the control status. If the control is
affected by disturbance, the module automatically changes or sets PID constants for the
optimum control.
Selects and controls the heating control (reverse action) or cooling control (forward
action).
Suppresses the manipulated value overshoot which frequently occurs when the set value
(SV) or the control target is changed.
Corrects the difference between the temperature process value (PV) and actual
temperature caused due to the measurement status.
Specifies to not execute the PID operation in a channel that do not perform temperature
control.
Forcibly stops the PID operation in a channel that temperature control is in process.
Measures the current that flows in the heater main circuit and detects the disconnection.
Measures the current that is flowing in the heater main circuit when the transistor output is
off, and detects the output off-time current error
Detects errors in the control system (control loop) caused by a load (heater)
disconnection, external operation devices (such as magnet relay) error, or sensor
disconnection.
By backing up data in the buffer memory to E
be reduced.
Monitors the process value (PV) and issues a warning.
Whether to hold or stop the temperature control output when a CPU stop error occurs can
be selected.
Specifies a control status by setting output signals and buffer memory areas.
Coordinates the time when several loops reach the set value (SV) at the same time.
Suppresses the peak current by changing automatically the upper limit output limiter
value of each channel and dividing the timing of transistor output.
Performs only the temperature measurement using unused temperature input terminals in
the heating-cooling control (normal mode) and mix control (normal mode).
Converts the temperature process value (PV) to the set width and stores this value into
the buffer memory areas.
Stores the errors and alarms occurred in the module to the buffer memory as a history. Up
to 16 errors and alarms can be stored.
Notifies the CPU module of the error detail when errors and alarms occur on the module.
Error information is stored to the memory in the CPU module as the module error history.
Clears the error from the system monitor window of the programming tool.
Specifies a auto tuning operation formula according to the selected cooling system
(water-cooling or air-cooling).
Specifies a temperature area near the temperature where heating output and cooling
output is switched from the following:
• Overlap area where both are output
• Dead band area where neither is output
Performs the temperature conversion in input channels that are not used for the control
(monitor channel 1, 2)
Description
2
PROM, the load of sequence program can