3-5
3-2 Adjustment before Operation
Perform auto setup before using the device. Then, adjust the zero span if necessary.
The zero span adjustment function in the device electrically sets the fully closed and fully
open positions of the valve independently of each other. Therefore, you can adjust each
of these positions without interfering with the other one.
3-2-1 Auto Setup
There are two auto setup methods.
• Method using the LUI
• Method through HART communication
This section describes the method using the LUI. For the method through HART
communication and the details of auto setup, refer to Chapter 4.
Handling Precautions:
• The input signal should be 5 mA or more. If it is less than 5 mA, auto setup may
not operate normally.
• If any of the self-diagnostic messages shown in Table 4-5 in 4-2-20, “Diagnostic
Messages” appears, auto setup cannot be executed.
• Once auto setup and zero span adjustment are completed, always remember
to change the input signal and to check the opening, valve travel, and other
valve operations.
• Correctly set the actuator type and feedback lever position when fully closed
before starting auto setup.
• In some cases, the dynamic characteristic is not set correctly with the actuator
capacity, operation stroke, inner diameter of pneumatic piping and piping
length. If this occurs, refer to '4-2-5 Control Configuration' and adjust the
dynamic characteristic manually.
• When the actuator size is Custom, the size is not changed with the Auto setup.
When selecting the actuator size with the Auto setup, set the size as below.
Param 1 to 6 or
Param A to C.
• In some cases, the initial setting is not same even though the actuator and
valve size is same. Please perform the operation check and configuration of the
device if necessary.
• There is a possibility that the forced open value described on page '4-2-7
Travel Cutoff' may change after performing the Auto-setup operation. Please
reconfigure the forced open value if necessary.
• If the booster relay is on, and is operating the Auto-setup function, there might
be a possibility of hunting. In this case, adjust the booster's sensitivity, or refer
to '4-2-5 Control Configuration and adjust the dynamic characteristic manually.
• If a speed controller is incorporated, set it to full open and execute auto-setup.
Afterwards, adjust the speed with the speed controller.
• When the device is purchased separately, its initial settings are set to those
in the list of default values in '6-7 List of Default Values for Internal Data' of
this manual. Because the default actuator direction is reverse, if you mount
the device on the direct actuator the device will not work. Please be sure to
execute the auto setup program before operation and be sure that appropriate
settings are created in the device.
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