Mitsubishi Electric NZ2GF2B-60TCRT4, User Manual

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163
CHAPTER 8 FUNCTIONS
8
8.
3 T
e
mperat
ure Cont
rol
M
ode
(b) Setting change of the remote buffer memory during the execution of auto tuning
If a setting in the following remote buffer memory areas is changed during the execution of auto tuning, the
processing ends in failure.
(c) Out of the temperature measurement range
If CH  Temperature process value (PV) (RWr8 to RWrB) exceeds the temperature measurement range and
either of the following conditions is satisfied, auto tuning ends in failure.
• CH  Input range upper limit (b0 of RWr4 to RWr7): 1 (ON)
• CH  Input range lower limit (b1 of RWr4 to RWr7): 1 (ON)
(d) Time until the temperature process value (PV) reaches the set value (SV) for the first
time or a half the hunting cycle of the temperature process value (PV)
If the time below exceeds two hours, auto tuning ends in failure
• Time from the start of auto tuning until CH  Temperature process value (PV) (RWr8 to RWrB) reaches the
set value (SV) for the first time
• A half the hunting cycle of CH  Temperature process value (PV) (RWr8 to RWrB)
(e) Calculated values of PID constants after auto tuning
If a calculated value of PID constants after auto tuning exceeds one of the following ranges, auto tuning ends in
failure.
• CH  Proportional band (P) setting (address: 102H, 132H, 162H, 192H): 1 to 10000 (0.1% to 1000.0%)
• CH  Integral time (I) setting (address: 103H, 133H, 163H, 193H): 1 to 3600 (1s to 3600s)
• CH  Derivative time (D) setting (address: 104H, 134H, 164H, 194H): 0 to 3600 (0s to 3600s)
If auto tuning ends in failure due to the calculated value of PID constants as described above, the system configuration
needs to be reconsidered (such as selecting proper heater capacity).
(f) Change of the upper limit setting limiter or lower limit setting limiter and the set
value (SV)
If the set value (SV) goes out of the setting range due to the change in one of the following remote buffer
memory areas, auto tuning ends in failure.
• CH  Upper limit setting limiter (address: 10AH, 13AH, 16AH, 19AH)
• CH  Lower limit setting limiter (address: 10BH, 13BH, 16BH, 19BH)
Remote buffer memory area name
Remote buffer memory address
Reference
CH1 CH2 CH3 CH4
CH  Set value (SV) setting 101H 131H 161H 191H Page 317, Appendix 3 (6)
CH

Upper limit output limiter 105H 135H 165H 195H
Page 321, Appendix 3 (10) CH  Lower limit output limiter 106H 136H 166H 196H
CH  Cooling upper limit output limiter 1C5H 1CAH 1CFH 1D4H
CH  Control output cycle setting 10CH 13CH 16CH 19CH
Page 326, Appendix 3 (15) CH

Heating control output cycle setting 10CH 13CH 16CH 19CH
CH  Cooling control output cycle setting 1C6H 1CBH 1D0H 1D5H
CH  Primary delay digital filter setting 10DH 13DH 16DH 19DH Page 328, Appendix 3 (16)
CH  AUTO/MAN mode shift 113H 143H 173H 1A3H Page 332, Appendix 3 (22)
CH

Forward/reverse action setting 115H 145H 175H 1A5H Page 334, Appendix 3 (24)
Cold junction temperature compensation
selection
1E9H Page 344, Appendix 3 (40)
CH  Sensor correction value setting 280H 281H 282H 283H Page 352, Appendix 3 (51)
CH  AT bias setting 2A1H 2A3H 2A5H 2A7H Page 355, Appendix 3 (57)