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Siemens SIMATIC S7 - Page 104

Siemens SIMATIC S7
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Data Exchange with the Central Controller
4–37
IP244
C79000–B8576–C860–02
Calculation of the response value:
 ! 
 
" 
 


"   
 !  
"    
 
Note: despite ”residual value processing” the response value should not be more
than 10%. If a greater value is used, unwanted temperature fluctuations can occur,
depending on the controlled system.
Guide values for the response value:
when using solid state switching devices (triac etc.):
response value = 0%
when using mechanical switching devices:
response value 3 to 6%
with 3-step controllers and air cooling (even when using solid state
switching devices):
response value 3 to 10% (to reduce wear on the fans)
Byte 30 Minimum jump for 3-step controllers
In this byte, you can read the minimum jump for the temperature setpoint if no
cooling parameters could be calculated during the self-tuning phase of
3-step controllers (see byte 23).
Byte 31 Message number

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