Function Summary - Mitsubishi Electric MELSEC Q Series User Manual

3 SPECIFICATIONS

3.2 Function Summary

Item
Auto-tuning function
Forward action/reverse action
selection function
RFB limiter function
Sensor compensation function
Unused channel setting
PID control forced stop
Heater disconnection detection
function
Current error detection function
when output is off
Loop disconnection detection
function
Data storage on E
Alert function
Control output setting at CPU
stop error occurrence
Q64TC control status
Online module change
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(2) For use of the Q64TCRT(BW)
Table 3.3 Usable platinum temperature-measuring resistors, measurement
temperature ranges and data resolutions
Platinum
temperature-
measuring resistor
type
Pt100
JPt100
The Q64TC function summary is shown in Table 3.4.
Table 3.4 Q64TC function summary
• The temperature control module automatically sets the optimal PID constants.
• 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.
• Reduces the difference between the measured value and actual temperature to zero
when these two are different due to measurement conditions, etc.
• Sets the PID operation for channels that do not perform temperature adjustment to "not
execute."
• Stops the PID operation for channels that is performing temperature adjustment.
• Measures the current that flows in the heater main circuit and detects disconnection
when the Q64TCTTBW or Q64TCRTBW is used.
• When the Q64TCTTBW or Q64TCRTBW is used, this function measures the current in
the heater's main circuit while the transistor's output is off, and checks if there is a
current error when output is off.
• 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
thermocouple disconnection.
• By backing up the buffer memory contents to E
2
PROM
can be reduced.
• Monitors the process value (PV) and alerts the user.
• This function continues/stops temperature adjustment control output at CPU stop error
occurrence.
• The Q64TC can be controlled by the output signal of the Q64TC and the settings in the
buffer memory.
• A module change is made without the system being stopped.
search engine
°C
Measurement
Data resolution
temperature range
-200.0 to 600.0
0.1
-200.0 to 200.0
-200.0 to 500.0
0.1
-200.0 to 200.0
Specification
2
PROM, the load of sequence program
MELSEC-Q
°F
Measurement
Data resolution
temperature range
-300 to 1100 1
-300.0 to 300.0 0.1
-300 to 900 1
-300.0 to 300.0 0.1
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
Chapter 7
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