XGB Analog edition manual
15 - 38
(2) Auto-tuning flag function
Each function of K area flags for XGB series auto-tuning is summarized as follows.
A) Common bit area
The area is a flag collecting operation setting and information consisting of bits to each 16 loop.
Each bit of each word device represents the information of each loop.
1) _AT_REV (auto-tuning run direction setting)
It determines the run direction of auto-tuning of ‘n’ th loop. If the bit is off, it is forward operation;
if on, it is reverse operation.
2) _AT_PWM_EN (PWM output enable)
It sets whether to output the auto-tuning MV of ‘n’ th loop as PWM output. If the bit is off, it is
disabled; if on, it is enabled.
3) _AT_ERROR (Auto-tuning error occurrence)
It indicates the error in case an error that discontinues operation during auto-tuning of ‘n’th loop
occurs. If an error occurs, it is on; if normal, it is off. Once an error occurs, auto-tuning stops
and the MV is output as the min. output set in the parameter. Also, if an error occurs, it
indicates the error code in the error code area of a loop. For more information about error code
types and measures, refer to 15.5. The area, as a dedicated monitor area, is updated although
a user directly enters it.
B) Auto-tuning flag area by loops
The auto-tuning flag areas by loops are K1860 ~ K2179 and each 20 words per loop are
allocated to totally 16 loops. Therefore, individual data area of ‘n’ th loop is between K
(1860+16*n) ~ K (1879+16*n).
1) _ATxx_SV (auto-tuning xx Loop SV setting)
It sets/indicates the auto-tuning SV of ‘xx’th loop.
The available scope is between -32,768 ~ 32,767.
_AT_REV
(PID RUN direction setting)
_AT_PWM_EN
(PWM output enable)
_PID_ERROR
(PID error occurrence)
_ATxx_SV
(AT xx Loop SV setting)
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