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3 SPECIFICATIONS
3.2.10 Data storage on E
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(2) When the input is disconnected or when the external operation device contact is
welded, it is judged as an error since the temperature will rise though the control
output is not provided.
In this case, an alert is output if a temperature fall of 2°C or more is not observed
within the preset loop disconnection detection judgment time after the control
output has dropped to 0%.
(In either case, inverse operation will be performed for forward action: cooling
control.)
POINT
(1) When not using the loop disconnection detection function, set the loop
disconnection detection judgment time to "0".
(2) Setting the loop disconnection detection dead band will not cause a loop
disconnection if there is no temperature variation of 2°C or more when the
control output is provided 100% or 0% at the set value. (Refer to Section
3.5.32.)
2
PROM
(1) Data storage on E
(a) The Q64TC buffer memory data can be stored onto E
The whole write-enabled area of the buffer memory can be backed up. Refer
to Section 3.5 for details of the buffer memory.
Buffer memory backed-up addresses (Hexadecimal)
20
to 38
H
H
3A
to 3D
H
H
C0
to C3
H
H
2
Write to E
PROM can be used to back up the PID constants set by auto
tuning and the data written directly to the buffer memory using a peripheral
device.
2
Write to E
PROM eliminates the program used to set data to the Q64TC.
(b) The backed up data is transferred from E
PLC CPU is powered on (power is switched on) or reset.
Hence, temperature control can be exercised without data being written when
the PLC CPU is powered on or reset.
2
PROM
40
to 58
60
to 78
H
H
H
H
4A
to 5D
6A
to 7D
H
H
H
H
A4
to AA
H
H
AF
H
B0
H
B5
H
D0
to D3
E0
to E3
H
H
H
H
108
to 11F
H
H
MELSEC-Q
2
PROM for backup.
Remarks
80
to 98
H
H
8A
to 9D
H
H
—————
F0
to F3
H
H
Q64TCTTBW,
Q64TCRTBW only
2
PROM to buffer memory when the
3 - 13
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