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Chapter 3: Operation
(2) Data confirmation method when communication with a setup device has been established
■ EPM (electro-pneumatic module) operation confirmation procedure
The operation confirmation procedure for the EPM is shown below.
Step Procedure
1 Set the input signal from the controller (constant-current supply) to a value that results in
an actual opening position of 50%.
2 Referring to 4.3.1, “Measured value confirmation,” confirm that the drive signal of the
process variables is 50±25%.
Caution
• If the above conditions are not satised, the EPM balance adjustment is o. Conse-
quently, EPM balance adjustment is necessary. If EPM balance adjustment is not
performed appropriately, the valve position may vary suddenly and damage the
EPM, so be sure to have this adjustment carried out by Azbil Corporation service
personnel, or by a representative who has received Azbil Corporation training.
■ Self-diagnostic results confirmation procedure
The procedure for confirming self-diagnostic results is shown below.
Step Procedure
1 Set the input signal from the controller (constant-current supply) to a value that results in
an actual opening position of 50%.
2 Referring to 4.8, “Self-diagnostics,” perform the self-diagnostics and confirm that the
diagnostics pass.
If not, refer Chapter 5, “Troubleshooting,” and take the appropriate measures.
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