Siemens SIMATIC S7-1200 Function Manual page 22

Principles for control
2.3 Characteristic values of the control section
Response rate of controlled systems
Controlled systems can be judged on the basis of the following values:
T < 0.5 min, T
u
T > 0.5 min, T
u
Parameters of certain controlled systems
Physical
quantity
Temperature Small electrically heated furnace
Large electrically heated annealing fur-
nace
Large gas-heated annealing furnace
Distillation tower
Autoclaves (2.5 m
High-pressure autoclaves
Steam superheater
Injection molding machines
Extruders
Packaging machines
Room heating
Flow rate Pipeline with gas
Pipeline with liquid
Pressure Gas pipeline
Drum boiler with gas or oil firing
Drum boiler with impact grinding mills
Vessel level Drum boiler
Speed Small electric drive
Large electric drive
Steam turbine
Voltage Small generators
Large generators
22
< 5 min = fast controlled system
g
> 5 min = slow controlled system
g
Controlled system
)
3
Delay time T Recovery time T
u
0.5 to 1 min 5 to 15 min
1 to 5 min 10 to 20 min
0.2 to 5 min 3 to 60 min
1 to 7 min 40 to 60 min
0.5 to 0.7 min 10 to 20 min
12 to 15 min 200 to 300 min
30 s to 2.5 min 1 to 4 min
0.5 to 3 min 3 to 30 min
1 to 6 min 5 to 60 min
0.5 to 4 min 3 to 40 min
1 to 5 min 10 to 60 min
0 to 5 s 0.2 to 10 s
None
None
None
1 to 2 min 2 to 5 min
0.6 to 1 min Not specified
None 0.2 to 10 s
None 5 to 40 s
None Not specified
None
None 5 to 10 s
Function Manual, 03/2017, A5E35300227-AC
Rate of rise v
g
Up to 60 K/min.
Up to 20 K/min.
1 to 30 K/min
0.1 to 0.5° C/s
Not specified
Not specified
2°C/s
5 to 20 K/min
2 to 35 K/min
1° C/min
Not relevant
None
0.1 s Not relevant
150 s Not relevant
Not relevant
0.1 to 0.3 cm/s
Not relevant
Not relevant
50 min
1 to 5 s Not relevant
Not relevant
PID control
max
–1