Mitsubishi Electric NZ2GF2B-60TCTT4 User Manual page 367

(72)CH Memory's PID constants read instruction (address: 1100H to 1103H)
Standard Heating-cooling
PID constants are read from a non-volatile memory and stored in the remote buffer memory by using this
instruction. Setting this remote buffer memory area to Requested (1) stores the value backed up in the non-
volatile memory in the remote buffer memory.
(a) Remote buffer memory areas to store set value of non-volatile memory
The following table lists the remote buffer memory areas whose set value is read.
Remote buffer memory area name
CH Proportional band (P) setting
CH Heating proportional band (Ph)
setting
CH Cooling proportional band (Pc)
setting
CH Integral time (I) setting
CH Derivative time (D) setting
CH Loop disconnection detection
judgment time
(b) Setting range
• 0: Not requested
• 1: Requested
(c) Enabling the setting
Enable the setting contents by either of the following.
• Turning off and on Initial data setting request flag (RY9) while the operations of all channels are stopped
• Turning off and on During operation setting change instruction (RY10)
(d) Default value
The default values are set to Not requested (0) in all channels.
(e) Precautions
When Requested (1) is set, do not perform the following operations. An incorrect value may be stored in the
non-volatile memory.
• Change of the set value of the remote buffer memory read from the non-volatile memory by this instruction
(Page 333, Appendix 3 (23) (d))
• Memory back up (Page 136, Section 8.1.7)
• Default setting registration (Page 297, Appendix 1.2 (6))
• Auto tuning (Page 159, Section 8.3.7)
● When the parameter is set and auto tuning is carried out, it is recommended that the PID constants should be backed up
to the non-volatile memory after the auto tuning. Turning on this instruction at the next start-up can omits the auto tuning.
● This instruction is enabled whether the operating status is stop or run. However, the instruction is disabled when CH
Auto tuning instruction (RY20 to RY23) is on. (Page 299, Appendix 1.2 (8))
Remote buffer memory address
CH1 CH2
102H 132H
102H 132H
1C4H 1C9H
103H 133H
104H 134H
116H 146H
CH3 CH4
162H 192H
162H 192H
1CEH 1D3H
163H 193H
164H 194H
176H 1A6H
APPENDICES
Reference
Page 318, Appendix 3 (7)
Page 320, Appendix 3 (8)
Page 320, Appendix 3 (9)
Page 334, Appendix 3 (25)
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