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(28)CH Automatic backup setting after auto tuning of PID constants (address:
119H, 149H, 179H, 1A9H)
The set value to be stored in the remote buffer memory is automatically backed up to a non-volatile memory by
using this function. By reading the set value that is backed up, when the power is turned off and on, another auto
tuning can be omitted.
For details on the auto tuning function, refer to the following.
Page 159, Section 8.3.7
(a) Remote buffer memory areas whose set value is backed up to a non-volatile
memory
The following table lists the remote buffer memory areas whose setting is backed up.
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: Disable
• 1: Enable
(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 Disable (0) in all channels.
(e) Precautions
When Enable (1) is set, do not perform the following operations. An incorrect value may be stored in the non-
volatile memory.
• Changing the set value of the remote buffer memory
• Memory back up (Page 136, Section 8.1.7)
• Default setting registration (Page 297, Appendix 1.2 (6))
• Change to Disable (0) during the auto tuning
Standard
Heating-cooling
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
A
Reference
Page 318, Appendix 3 (7)
Page 320, Appendix 3 (8)
Page 320, Appendix 3 (9)
Page 334, Appendix 3 (25)
337
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