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Building Technologies
Basic Documentation LMV5...
CC1P7550en
7 Boiler controller / load controller
22.05.2018
7.4.2.1 Manual setting of the PID control parameters
It is possible to manually set the PID parameters to any value in the setting range
shown below, to activate a triple value from the predefined standard values described
below (and edit it further if required), or to use the adaption function (self-setting
function) instead of making the settings manually. The LMV5 then acquires the PID
parameters itself.
Parameter:
Proportional band
P-part (Xp) (2...500%)
from 100 °C / 1 bar or 212 °F / 14.5 psi
Reaction:
Xp = 2%
↑
strong / fast
Xp = 500%
↑
weak / slow
Integral action time
I-part (Tn) (0...2,000 s)
0 = no I-part
Reaction:
Tn = 1
↑
strong / fast
Tn = 2.000
↑
weak / slow
Derivative action
time
D-part (Tv) (0...1,000 s)
0 = no D-part
Reaction:
Tv = 1
↑
weak / slow
Tv = 1,000
↑
strong / fast
The controller’s memory contains 5 standard parameter sets.
If required, 1 of these 5 PID triple values can be copied to the storage locations for the
actual values so that it becomes active.
PID standard values for the following applications:
Parameter
Standardparam (Adaption / very fast / fast / normal / slow / very
slow)
Adaption
The values acquired by the LMV5 adaption function are used
Xp
in %
Tn
in s
Tv
in s
very fast
(e.g. for small boiler)
42.5
68
12
fast
14.5
77
14
normal
6.4
136
24
slow
4.7
250
44
very slow
(e.g. for large boiler)
3.4
273
48
Standard values of
control parameters
