Forward/Reverse Action Setting (Buffer Memory Address: 36 H , 56 H , 76 H , 96 H ); Upper/Lower Setting Limiter (Buffer Memory Address: 37 H , 38 H , 57 H , 58 H , 77 H , 78 H , 97 H , 98 H ); Heater Disconnection Alert Setting (Buffer Memory Address: 3A H , 5A H , 7A H , 9A H ); Loop Disconnection Detection Judgment Time Setting (Buffer Memory Address: 3B H , 5B H , 7B H , 9B H ) - Mitsubishi Electric MELSECSystem Q User Manual

3 SPECIFICATIONS
3.5.28 Forward/reverse action setting (buffer memory address: 36
3.5.29 Upper/lower setting limiter
(buffer memory address: 37
3.5.30 Heater disconnection alert setting (buffer memory address: 3A
3.5.31 Loop disconnection detection judgment time setting
(buffer memory address: 3B
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(1) Sets whether each channel of the Q64TC will be used for forward or reverse
action.
• Forward action (cooling control): 0
• Reverse action (heating control): 1
, 38
H
(1) Sets the upper and lower limits of the set value (SV).
(2) Set a value within the temperature measurement range specified for the input
range.
Make setting so that the (lower output limiter value) is less than the (upper output
limiter value).
Lower limit value
Input lower limit
(1) Sets the value set for heater disconnection detection or output off-time current
error detection as a percentage (%) of the reference heater current value.
(2) The setting range is 0 to 100%.
When the value is 0, heater disconnection detection and output off-time current
error detection are not performed.
, 5B
H
(1) The loop disconnection detection function detects errors in the control system due
to a load disconnection, external operation device fault, sensor disconnection and
the like.
No temperature change of greater than 2°C (2°F) within the loop disconnection
detection judgment time is judged as a loop disconnection.
(2) As the loop disconnection detection judgment time, set a value longer than the
time taken to vary the temperature 2°C (2°F).
(3) Performing auto tuning automatically sets a value twice longer than the integral
time as the loop disconnection detection judgment time.
However, if the loop disconnection detection judgment time was set to 0 at the
auto tuning, the loop disconnection detection judgment time is not stored.
, 57 , 58 , 77 , 78
H H H H
SV value setting range
, 7B , 9B )
H H H
MELSEC-Q
, 56 , 76 , 96
H H H
, 97 , 98 )
H H H
Upper limit value
Input upper limit
, 5A , 7A
H H
)
H
, 9A )
H H
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