FC6A S
ERIES
MICROS
MART
L
ADDER
P
ROGRAMMING
M
ANUAL
FC9Y-B1726 19-19
19: PID C
ONTROL
I
NSTRUCTION
Operation status (S1+2)
Indicates the PIDA instruction execution status or error status. It stores the status code.
• X in the table indicates the elapsed time from the start of AT until the set point is reached. X is incremented by 1 every 10 minutes. 9 is
stored if the elapsed time is equal to or longer than 90 minutes.
• x in the table indicates the elapsed time from the start of PID instruction until the set point is reached. x is incremented by 1 every 10
minutes. 9 is stored if the elapsed time is equal to or longer than 90 minutes.
• If an error code (status code value is equal to or greater than 100 and less than 120) is set for the operation status, execution for PID control
is stopped. Set the correct parameters and then turn on the PIDA instruction input once again.
Status Code Status Description Status Classification
1x Auto tuning in progress
AT is normally executed
2x Auto tuning ended
5x P/PI/PID control in progress
PID control is normally executed
6x Set point is reached (Changes from 5x to 6x onace the set point is reached.)
103
Output manipulated variable restriction upper limit value < output manipulated
variable restriction lower limit value was set.
PID control execution stop
104 — Reserved — —
106
A value was set for the set point that does not satisfy process variable minimum value
≤ set point ≤ process variable maximum value.
PID control execution stop
109
Process variable > process variable maximum value or process variable < process
variable minimum value was set.
PID control execution stop
120 The control mode was set to a value other than 0 to 3. PID control execution continues
121 The sampling period was set to 0 or 10,001 or greater. PID control execution continues
122 The proportional band was set to 0 or a value of 10,001 or greater. PID control execution continues
123 The derivative gain was set to 0 or a value of 101 or greater. PID control execution continues
124 The integral start factor (ARW) was set to a value of 101 or greater. PID control execution continues
125
A value was set for the alarm 1 value (process high alarm) that does not satisfy alarm
2 value (process low alarm) < alarm 1 value (process high alarm) ≤ process variable
maximum value.
PID control execution continues
126
A value was set for the alarm 2 value (process low alarm) that does not satisfy
process variable minimum value ≤ alarm 2 value (process low alarm) < alarm 1 value
(process high alarm).
PID control execution continues
127
The output manipulated variable restriction upper limit value was set to a value
between 101 to 10,000 or 10,100 to 65,535.
PID control execution continues
128
The output manipulated variable restriction lower limit value was set to a value of 101
or higher. PID execution continues
PID control execution continues
129 The output manipulated variable rate of change was set to a value of 101 or higher. PID control execution continues
130
The manual mode output manipulated variable was set to a value that does not satisfy
output manipulated variable restriction lower limit value ≤ manual mode output
manipulated variable ≤ output manipulated variable restriction upper limit value.
PID control execution continues
131 The proportional band offset value was set to a value that is not between -100 to 100. PID control execution continues
132 The control cycle was set to 0 or a value of 501 or greater. PID control execution continues
133
A value was set that does not satisfy process variable minimum value < (set point - AT bias
setting value) and process variable maximum value > (set point + AT bias setting value).
PID control execution continues
134
The PIDA instruction is executed, and from the second and subsequent scans, a value
is set for the set point that does not satisfy minimum value ≤ set point ≤ maximum
value.
PID control execution continues
(Maintains the set point in the normal
range up to the previous scan.)
135 to 199 — Reserved — —
200 The alarm type for Alarm 3 was set to a value of 10 or higher. PID control execution continues
201 The alarm type for Alarm 4 was set to a value of 10 or higher. PID control execution continues
202 The alarm type for Alarm 5 was set to a value of 10 or higher. PID control execution continues
203 The alarm type for Alarm 6 was set to a value of 10 or higher. PID control execution continues
204 to 209 — Reserved — —
210
The action point for Alarm 3 with the set alarm value exceeded the process variable
minimum value or maximum value.
PID control execution continues
211
The action point for Alarm 4 with the set alarm value exceeded the process variable
minimum value or maximum value.
PID control execution continues