AH500 Module Manual
5-12
c. PID parameters
Performing/Not performing the PID
algorithm
Bit 0~bit 3: CH0~CH3 (Performing/Not
performing the PID algorithm)
Bit 8~bit 11: CH0~CH3 (Manual/Automatic
tuning)
Manual/Automatic tuning
Heating/Cooling mode Bit 0~bit 3: CH0~CH3
Sampling time
One-word decimal format
Unit: 10 ms
Automatic mode
Automatic tuning Bit 0~bit 3: CH0~CH3
Refreshing the
manual output
values automatically
Bit 0~bit 3: CH0~CH3
One-double word floating-point format
One-double word floating-point format
Integral gain One-double word floating-point format
One-double word floating-point format
Range within which
the error values are
count as 0
One-double word floating-point format
When the setting value is 0, the function is
not enabled. For example, if the setting value
is 5, and the difference between the present
value and the target value is in the range of -5
to 5, the output value is 0.
value
One-double word floating-point format
value
One-double word floating-point format
value
One-double word floating-point format
integral value
One-double word floating-point format
One-double word floating-point format
d. Additional remarks on PID control
(1) If K
p
, K
i
, or K
d
is 0, the corresponding function is disabled. For example, if users only want
to use proportional control, K
i
and K
d
are 0.
(2) If users do not know how to adjust the parameters K
p
, K
i
, and K
d
under a controlled
environment, they can use the automatic tuning function to set the parameters, and then
finely adjust the parameters to the optimum values. When the automatic tuning function
is enabled, the value in a register defined by the users is 1. After the automatic tuning of
the parameters is complete, the value in the register becomes 0.
(3) If users want to set the parameters K
p
, K
i
, and K
d
by themselves, they need to set the K
p
by experience, and set the K
i
, and K
d
to 0. After the tuning of the K
p
is complete, the
users can tune the K
i
, and K
d
in order.
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