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This is the proportional band term which is used in the PID control loop for the appropriate setpoint.
It may be set to any value from 0 to 100%, where 0% means no proportional band.
The parameter may be adjusted if the following conditions exist:
•
The unit is in set-up or commission mode.
•
Option 11.0 / 13.0 is not set to zero.
•
The appropriate setpoint is selected.
Option 11.5 - Setpoint 1 integral term (0 – 100)
Option 13.5 - Setpoint 2 integral term (0 – 100)
This is the integral term which is used in the PID control loop for the appropriate setpoint. It may be
set to any value from 0 to 100, where 0 means no integral term.
The parameter may be adjusted if the following conditions exist:
•
The unit is in set-up or commission mode.
•
Option 11.0 / 13.0 is not set to zero.
•
The appropriate setpoint is selected.
Option 11.6 - Setpoint 1 derivative term (0 – 100)
Option 13.6 - Setpoint 2 derivative term (0 – 100)
This is the derivative term which is used in the PID control loop for the appropriate setpoint. It may
be set to any value from 0 to 100, where 0 means no derivative term.
The parameter may be adjusted if the following conditions exist:
•
The unit is in set-up or commission mode.
•
Option 11.0 / 13.0 is not set to zero.
•
The appropriate setpoint is selected.
Option 11.7 - Setpoint 1 remote zero value (0 - 999)*
When setpoint 1 is selected and the remote setpoint function is enabled (see option parameter 03.3),
this is the PID control value displayed when a 4mA signal is present on the auxiliary modulation
input. See section 8.3.
There is no such function for setpoint 2.
This parameter is not used when a track modulation input type is selected.
Option 11.8 - Setpoint 1 remote span value (0 – 999)*
When setpoint 1 is selected and the remote setpoint function is enabled (see option parameter 03.3),
this is the PID control value displayed when a 20mA signal is present on auxiliary modulation input.
There is no such function for setpoint 2.
This parameter is not used when a track modulation input type is selected.
Option 12.0 - Setpoint 1 control limit type (0 – 2)
Option 14.0 - Setpoint 2 control limit type (0 – 2)
This option parameter defines the control limit type for the appropriate setpoint.
The following values are possible for this parameter:
0
- No limits
1
- Absolute limit
2
- Deviation limit
When an absolute limit is selected, the values entered in option parameters 12.1 to 12.4 OR 14.1 to
14.4 are the actual limit values.
When a deviation limit is selected, the values entered in option parameters 12.1 to 12.4 OR 14.1 to
14.4 form a deviation from the appropriate setpoint control value. This means that if the setpoint
control value is changed, the limits are automatically changed correspondingly.
