IDEC MicroSmart Pentra - Manual (Page 40)

PID M ODULE M AIN F UNCTIONS
FC5A MicroSmart PID Module User’s Manual FC9Y-B1283 4-17
1st Scan after the completion of CH1 auto-tuning (AT)
At the falling edge of D1018.1 (CH1 auto-tuning monitor bit),
Q0 is turned on.
3rd Scan
At the rising edge of M1, the following are executed in order.
D1022.0 is turned on. CH0 control is enabled.
D1022.1 is turned on. AT for CH0 control is performed.
D1025.0 is turned on. CH1 control is enabled.
M1006 (Block 5 writing) is turned off.
2nd Scan after the completion of CH0 auto-tuning (AT)
At the falling edge of M1, the following are executed in order.
D1025.0 is turned on. CH1 control is enabled.
D1025.1 is turned on. AT for CH1 control is performed.
M1006 (Block 5 writing) is turned off.
1st Scan after the completion of CH0 auto-tuning (AT)
At the falling edge of D1009.1 (CH0 auto-tuning monitor bit),
the following are executed in order.
D1025.0 is turned off. CH1 control is disabled.
D0 and D1 are moved to D1178 and D1179, respectively.
The original values are moved to the external SP input linear
conversion max. and min. values.
M1006 (Block 5 writing) is turned on.
Values in D1178 and D1179 are written to the PID module.
M1 is turned off.
2nd Scan
At the falling edge of M0, the following are executed in order.
M1000 (reading all parameters) is turned off.
D1178 (external SP input linear conversion max. value) and
D1179 (external SP input linear conversion min. value) are
moved to D0 and D1, respectively.
D1023 is stored in D1020.
CH1 set point (SP) is copied to CH0 set point (SP).
D1023 is stored in D1178 and D1179.
CH1 set point (SP) is copied to the external SP input linear
conversion max. and min. values.
M1006 (Block 5 Writing) is turned on.
Values in D1178 and D1179 are written to the PID module.
M1 is turned on.
1st Scan
At the rising edge of M0, the following are executed in order.
D1022.0 is turned off. (CH0 control is disabled.)
D1025.0 is turned off. (CH1 control is disabled.)
M1000 (reading all parameters) is turned on.
(All parameters are read from the PID module.)
M0 is turned off.