4-12
■ Gland packing type configuration procedure
Step Procedure
1 Select [Device] >> [Setup] >> [Control Configuration] >> [Act. Size/Gland Packing
Type], and check the current setting. If the actuator size is 0, A, B, or C, the gland packing
type is not displayed.
2 Select [Device] >> [Setup] >> [Control Configuration] >> [Change Gland Packing Type],
and select [Light], [Medium], or [Heavy].
■ Gap PID parameters
For actuator size, if parameter 0 has been selected, the gap operation type PID param-
eters can be set individually. The gap action PID method is utilized as the dynamic
characteristics algorithm for this device. In the gap action type PID method, deviation
values (the gap) above and below the set-point value are set up, and the PID parameters
are changed depending on whether the process value is inside or outside the gap. The
merits of this method are that it is relatively simple to tune and that it enables both fast
response and stability. The meaning of each parameter is described below.
Table 3. Gap Action Type PID Parameters
Parameter Parameter Meaning Units
P Reciprocal of the in-gap proportional band %
−1
I Inside-gap integrated time s
D Inside-gap differentiated time s
GE Gap width %
GP Reciprocal of the out-of-gap proportional band %
−1
GI Outside-gap integrated time s
GD Outside-gap differentiated time s
Example:
P = 2.000 indicates that 2%
−1
= % = 50%.
This means using 50% as the proportional band, as it is commonly called.
Note
• The input setting range for these values is −19999 to +19999.
• The GP, GI, and GD parameters cannot be set when GE is 0.
■ Gap PID parameter configuration procedure
Step Procedure
1 Select [Device] >> [Setup] >> [Control Configuration] >> [Change Actuator Size], and
set the actuator size to the parameter 0. The PID parameters will be displayed.
2 Select [Device] >> [Setup] >> [Control Configuration] >> [PID Parameter]. You will be
able to check or modify seven PID parameters (P, I, D, GE, GP, GI, and GD).
3 Enter values to set the seven respective PIDs. For the SFN version, start the method and
enter the values in order.
4 For the HART
® version, send the modified setting to the device using the transmission
button.
1
0.02
To Next Page
Loading...
Need help?
General
