Function Summary - Mitsubishi Q Series User Manual

3 SPECIFICATIONS

3.2 Function Summary

Item
Auto tuning function
Auto tuning mode setting function
Forward action/reverse action
selection function
RFB limiter function
Sensor compensation function
Unused channel setting function
PID control forced stop function
Loop disconnection detection
function
Data storage in FeRAM function
Alert function
Control output setting for CPU
stop error occurrence function
Program control function
Cascade control function
Scaling function
Simplified analog I/O input
function
Online module change function
Control function of Q62HLC
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The Q62HLC function summary is shown in Table 3.6.
Table 3.6 Q62HLC function summary
• The loop control module automatically sets the optimal PID constants.
• Sets the auto tuning mode according to the control target to use by setting AT (auto
tuning) differential gap and AT additional lag.
• Heat control (reverse action) or cooling control (forward action) can be selected and
controlled.
• Limit the manipulation value overshoot which frequently occurs when the set value (SV)
is changed or control target is changed.
• Compensates a difference between measured values and actual temperature,
humidity, pressure, flow rate or others, if any, according to the measured status, etc.
• Sets the PID operation for channels that do not control to "not execute."
• Stops the PID operation for channels that is performing temperature adjustment.
• A function to detect errors in the control system (control loop) caused by a load (heater)
disconnection, abnormal external operation device (such as magnet relay), or a Input
Sensor disconnection.
• By backing up the buffer memory contents to FeRAM, the load of sequence program
can be reduced.
• Monitors the process value (PV) and alerts the user.
• This function continues/stops control output at CPU stop error occurrence.
• Performs the control changing the set value, following the time schedule
• Performs the control using the channel 1 as master and the channel 2 as slave.
• Scales the set value and stores it in the buffer memory.
• Uses the Q62HLC as simplified thermocouple/micro voltage input module analog-digital
converter module, digital-analog converter module by monitoring the set value and
manually setting the manipulated value.
• A module change is made without the system being stopped.
• Controls the Q62HLC by the output signal of Q62HLC and the settings in the buffer
memory.
Specification
MELSEC-Q
Reference
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.2.8
3.2.9
3.2.10
3.2.11
3.2.12
3.2.13
3.2.14
3.2.15
Chapter 7
3.2.16
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