ABB C310 Programming Manual page 35

...4 CONFIGURATION
...4.10 Set Up Control Page
OP–HI
100.0
HEAtCL
OP–LO
0.0
ACtION
rEV
HEAtCL
32
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Output High Limit
This limits the high level of the control output value (or
valve position) when in Automatic mode. If the control
output is above this limit when Automatic mode is selected,
the output is allowed to stay at its current level but is not
allowed to go any higher. Once the control output returns
to, or below, this limit the limit then applies. When the
controller is in Manual mode the output limits do not apply.
Select the output high limit value (or valve position)
required, between 0.0 and 100.0% in 0.1 increments.
Output Low Limit
This limits the low level of the control output value (or valve
position) when in Automatic mode. If the control output is
below this limit when Automatic mode is selected, the
output is allowed to stay at its current level but is not
allowed to go any lower. Once the control output returns to,
or above, this limit the limit then applies. When the
controller is in Manual mode the output limits do not apply.
Select the output low limit value (or valve position)
required, between 0.0 and 100.0% in 0.1 increments.
Control Action
Select the action for the P.I.D. control output:
–
dir
–
rEV
Output
100
decreases
as process
variable
increases
%
Output
0
Eng. Range
Reverse Acting
Continued on next page.
direct acting
reverse acting.
100
%
Output
PV 0
Eng. Range
Direct Acting
Output
increases
as process
variable
increases
PV