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(11)E
2
PROM's PID constants read/write completion flag (Un\G31)
This flag indicates whether an operation to the E
2
PROM by the settings in the following buffer memory areas is
completed or failed.
•CH E
2
PROM's PID constants read instruction (Un\G62, Un\G94, Un\G126, Un\G158) ( Page 127,
Section 3.4.2 (36)
)
•CH Automatic backup setting after auto tuning of PID constants (Un\G63, Un\G95, Un\G127, Un\G159)
( Page 128, Section 3.4.2 (37))
(a) Correspondence between each bit and flag
The following table lists flags that correspond to bits of this buffer memory area.
(b) ON/OFF timing for CH E
2
PROM's PID constants read instruction (Un\G62, Un\G94,
Un\G126, Un\G158) ( Page 127, Section 3.4.2 (36))
The following figure shows the ON/OFF timing of this flag for CH E
2
PROM's PID constants read instruction
(Un\G62, Un\G94, Un\G126, Un\G158). (For CH1)
When the data reading from E
2
PROM is completed normally, CH Read completion flag (b0 to b3 of Un\G31)
of the corresponding channel turns on.
CH Read completion flag (b0 to b3 of Un\G31) turns off when CH E
2
PROM's PID constants read
instruction (Un\G62, Un\G94, Un\G126, Un\G158) is turned off from on.
When the data reading from E
2
PROM fails, CH Read failure flag (b8 to b11 of Un\G31) of the corresponding
channel turns on and the Q64TCN operates with PID constants before the data reading. (The LED status
remains.)
CH Read failure flag (b8 to b11 of Un\G31) turns off when the data reading of the corresponding channel is
completed normally.
When the data reading fails, try it again by turning CH E
2
PROM's PID constants read instruction (Un\G62,
Un\G94, Un\G126, Un\G158) ON OFF ON.
Bit
number
Flag description
Bit
number
Flag description
b0 CH1 Read completion flag b8 CH1 Read failure flag
b1 CH2 Read completion flag b9 CH2 Read failure flag
b2 CH3 Read completion flag b10 CH3 Read failure flag
b3 CH4 Read completion flag b11 CH4 Read failure flag
b4 CH1 Write completion flag b12 CH1 Write failure flag
b5 CH2 Write completion flag b13 CH2 Write failure flag
b6 CH3 Write completion flag b14 CH3 Write failure flag
b7 CH4 Write completion flag b15 CH4 Write failure flag
Common
00 0 0
111
CH1 E
2
PROM's PID constants
read instruction
(Un\G62)
CH1 Read completion flag
(b0 of Un\G31)
CH1 Read failure flag
(b8 of Un\G31)
Read completion
Read failure
Read completion
ON
OFF
OFF
ON
ON
Executed by the Q64TCN