4-11
Chapter 4: Communication-Based Operation
4.4.4 Control configuration
For the device’s dynamic characteristics, the PID parameters are selected based on the
combination of actuator size and gland packing type.
■ Actuator size
Select the actuator size from parameters 0 to 9, A, B, and C (Param 0 to 9, A, B, and C).
(This is selected automatically when auto-setup is executed.)
If auto setup cannot be executed or the desired parameter cannot be set by auto setup,
see the table below to select a PARAM that is suitable for the installed actuator.
Table 4-1. Actuator Size Parameter Table
Actuator Size
(ACTUATOR SIZE)
Operating Speed [s] Typical Actuator Type
Actuator Capacity
(Typical Value) [cm
3
]
PARAM C to 0.58 — —
PARAM B to 0.8 — —
PARAM A to 1.02 — —
PARAM 1 to 1.5 PSA1, PSK1 600
PARAM 2 to 3 PSA2, HA2 1,400
PARAM 3 to 6.6 PSA3, HA3 2,700
PARAM 4 to 12 PSA4, HA4 6,600
PARAM 5 to 99 VA 5 25,300
PARAM 6 to 20 VA6, PSA6 8,100
PARAM 7 to 1.9 RSA1 760
PARAM 8 to 4.3 RSA2 3,800
PARAM 9 to 99 VR3, VR3H 5,800
PARAM 0 — — Set individually*
* Consult with Azbil Corporation service personnel.
■ Actuator size configuration procedure
Step Procedure
1 Select [Device] >> [Setup] >> [Control Configuration] >> [Act. Size/Gland Packing
Type], and check the current setting.
2 Select [Device] >> [Setup] >> [Control Configuration] >> [Change Actuator Size], and
select from parameters 0 to 9, A, B, and C. If parameter 0 has been selected, the gap action
type PID parameters can be set individually. (Parameters 7 to 9 are specifically for the
Azbil Corporation VFR control valve RSA/VR actuator.)
■ Gland packing type
For the hysteresis difference due to friction of the control valve gland packing,
select from [Heavy], [Medium] and [Light]. (This is selected automatically when auto-
setup is executed.) Regarding the types of gland packing, see Table 2 below.
Table 2. Gland Packing Type Parameter Table
Hysteresis* (HYSTERESIS) Gland packing material example
Heavy (HEAVY) Graphite packing
Medium (MEDIUM) Yarn packing
Light (LIGHT) V type PTFE packing
* This cannot be decided on the basis of material because it depends on the
frictional force of the gland packing.
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