Azbil 700 series - Page 63

4-7
Table 4-2 Actuator Size
Actuator Size
Operating speed
[s]
Typical actuator
model
Actuator capacity
(Typical value) [cm
3
]
PARAM C Up to 0.25 - 200
PARAM B Up to 0.35 - 300
PARAM A Up to 0.45 - 400
PARAM 1 Up to 0.85 PSA1, PSK1 600
PARAM 2 Up to 2.0 PSA2, HA2 1400
PARAM 3 Up to 6.5 PSA3, HA3 2700
PARAM 4 Up to 8.15 PSA4, HA4 6600
PARAM 5 Up to 12 PSA6 8100
PARAM 6 Up to 99 VA5 25300
- Friction Level
Select Heavy, Medium, or Light depending on the gland packing. (It is not necessary to
specify this item when Custom is selected for Actuator Size.)
Table 4-3 Friction Level
Friction Level * Example of gland packing material
HEAVY Graphite packing type
MEDIUM Yarn packing type
LIGHT V-type PTFE packing type
* This value differs depending on the friction of the gland packing rather than the material.
- Control Deadband
Specify the deadband. Although deadband may be effective in preventing hunting,
when the friction of the gland packing is especially large, for example, we recommend
keeping this value within 1%.
- Replace Control Parameters
Replace the PID parameters selected in Actuator Size and Friction Level with the
values in Control Parameters. The setting can be changed only if Actuator Size is set to
Custom.
- Control Parameters
When Actuator Size is Custom, each PID must be specified individually.
The control algorithm employs dual GAP PID control, which switches PID parameters
between three levels depending on the control deviation size. There are 11 parameters
as shown below. Set a value larger than the dual width to the gap width. The
integration operation is disabled when 9999 is set as the value of the integral.
P Outside of Gap: Proportional gain outside the gap width [1/%]
I Outside of Gap: Integral time outside the gap width [s]
D Outside of Gap: Differential time outside the gap width [s]
Gap Band: Gap width [±%]
P Inside Gap: Proportional gain within the gap width [1/%]
I Inside Gap: Integral time within the gap width [s]
D Inside Gap: Differential time within the gap width [s]
Dual Gap Band: Dual gap width [±%]
P Inside of Dual Gap: Proportional gain within the dual gap width [1/%]
I Inside of Dual Gap: Integral time within the dual gap width [s]
D Inside of Dual Gap: Differential time within the dual gap width [s]