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1 GENERAL DESCRIPTION
1 GENERAL DESCRIPTION
This manual deals with the specifications, handling and instructions wiring and
programming methods of the following temperature control modules used with the
MELSEC-Q series PLC CPU module (hereafter abbreviated to the PLC CPU).
• Type Q64TCTT temperature control module
• Type Q64TCRT temperature control module
• Type Q64TCTTBW temperature control module with disconnection detection function
• Type Q64TCRTBW temperature control module with disconnection detection function
(1) What are Q64TCTT and Q64TCRT?
PLC CPU
Initial
setting
(TO
instruction)
1 - 1
(a) The Q64TCTT and Q64TCRT are modules designed to convert input values
from external temperature sensors into 16-bit signed BIN (binary) data,
perform PID operations to attain target temperatures, and provide transistor
outputs for temperature control.
(b) The Q64TCTT and Q64TCRT have an auto tuning function which
automatically sets the proportional band (P), integral time (I) and derivative
time (D) for PID operations.
(c) The Q64TCTT accepts K, J, T, B, S, E, R, N, U, L, PL II and W5Re/W26Re
type thermocouples. The Q64TCRT accepts Pt100 and JPt100 type platinum
temperature-measuring resistors.
Q64TCTT,Q64TCRT
Buffer memory
CH1
Process
value
CH4
CH1
Manipulated
value
CH4
CH1
Set value
CH4
Fig. 1.1 Q64TCTT or Q64TCRT Processing Outline
REMARK
1) Refer to Section 3.2.1 for the auto tuning function
2) Refer to Section 3.1.2 for the measured temperature ranges of the temperature
sensors that can be connected to the Q64TC.
Input from temperature
CH1
Transistor output
(ON/OFF pulse)
Manipulated value
CH1
MELSEC-Q
sensor
Temperature
Device
to be
controlled
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1
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