Siemens SIMATIC Manual page 87

Addr Parameter
170.0 TI
174.0 TD
178.0 D_F
182.0 CON_
ZONE
186.0 CONZ_ON
186.1 TUN_ON
186.2 TUN_ST
PID Temperature Control
A5E00125039-02
Decl. Data Range of
Type Values
≥ 0.0 s
INPUT/ REAL
OUTPUT
≥ 0.0 s
INPUT/ REAL
OUTPUT
INPUT/ REAL 5.0 to 10.0
OUTPUT
INPUT/ REAL Dependent
OUTPUT on the
sensors
used
INPUT/ BOOL
OUTPUT
INPUT/ BOOL
OUTPUT
INPUT/ BOOL
OUTPUT
Initial Description
Value
40.0 s RESET TIME [s]
10.0 s DERIVATIVE TIME [s]
The "derivative time" input decides
the derivative action response.
DERIVATIVE FACTOR
5.0
The derivative factor decides the
lag of the D action.
•
D_F = derivative time/
"lag of the D action"
CONTROL ZONE
100.0
If the error is greater than the
control zone width, the upper
manipulated variable limit is output
as the manipulated variable.
If the error is less than the negative
control zone width, the lower
manipulated variable limit is output
as the manipulated variable.
FALSE CONTROL ZONE ON
CONZ_ON =TRUE activates the
control zone.
FALSE SELF TUNING ON
If TUN_ON=TRUE is set, the
manipulated value is averaged until
the manipulated variable excitation
TUN_DLMN is activated either by a
setpoint step change or by
TUN_ST=TRUE.
FALSE START SELF TUNING
If the setpoint is to remain constant
during controller tuning at the
operating point, a manipulated
variable step change by the amount
of TUN_DLMN is activated by
TUN_ST=1.
Appendix
A-9