Mitsubishi Electric NZ2GF2B-60TCTT4 User Manual page 369

(c) ON/OFF timing for CH Automatic backup setting after auto tuning of PID constants
(address: 119H, 149H, 179H, 1A9H)
The following figure shows ON/OFF timing of this flag for CH Automatic backup setting after auto tuning of
PID constants (address: 119H, 149H, 179H, 1A9H). (For CH1)
CH1 Auto tuning status (RX20)
CH1 Automatic backup setting after
auto tuning of PID constants
(address: 119H)
CH1 Write completion flag
(address: b4 of 1104H)
CH1 Write failure flag
(address: b12 of 1104H)
When the data writing to the non-volatile memory is completed normally, CH Write completion flag (address:
b4 to b7 of 1104H) turns on.
CH Write completion flag (address: b4 to b7 of 1104H) turns off when CH Automatic backup setting after
auto tuning of PID constants (address: 119H, 149H, 179H, 1A9H) is set to Disable (0) from Enable (1).
When the data writing to the non-volatile memory fails, CH Write failure flag (address: b12 to b15 of 1104H)
of the corresponding channel turns on and the temperature control module operates with PID constants
calculated in the previous auto tuning. (The LED status remains.)
CH Write failure flag (address: b12 to b15 of 1104H) turns off when the data writing of the corresponding
channel is completed normally.
When the data writing fails, perform auto tuning again by turning off and on CH Auto tuning instruction (RY20
to RY23). If the data writing fails even after executing auto tuning again, a hardware error can be the reason.
Please consult your local Mitsubishi representative.
For details on the ON/OFF timing for CH Automatic backup setting after auto tuning of PID constants
(address: 119H, 149H, 179H, 1A9H)
Page 337, Appendix 3 (28)
● By referring to this flag at the completion of auto tuning, whether the automatic data backup is completed normally or not
can be checked.
● After confirming that the following flags are on, set CH Automatic backup setting after auto tuning of PID constants
(address: 119H, 149H, 179H, 1A9H) to Disable (0).
• CH Write completion flag (address: b4 to b7 of 1104H) (when automatic data backup is completed normally)
• CH Write failure flag (address: b12 to b15 of 1104H) (when automatic data backup fails)
If auto tuning is executed under Enable (1), although PID constants are stored after auto tuning is complete, CH Auto
tuning status (RX20 to RX23) does not turn off.
For details on the auto tuning function, refer to the following.
Page 159, Section 8.3.7
ON
OFF
0 1
0
OFF
ON
OFF
Auto tuning completion
(Write failure)
Controlled by the program
Controlled by the temperature control module
1
ON
Auto tuning completion
(Write completed)
APPENDICES
A
0
367