CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
7 – 8 with a multimeter.
3) Feedback potentiometer: Check voltage across the termi-
nals 9 – 11 to show approx. 3.3V and 10 – 11 within 0 to
approx. 3.3V.
4) Output: Check voltage across the output terminals.
MANUAL OPERATION
Even when there is no input signal from Modbus, there is
the possibility to force the position to 0% or 100% using the
manual operation switches (OPEN COM and CLOSE COM)
in the panel accessible from the frontal side.
Manual operation switch has priority over the opening posi-
tion from Modbus, therefore, when the control is intended
to be from Modbus, be sure to turn off the manual operation
switch.
Also turning both (open and close) switches on, both will be
out of function.
ADJUSTMENTS
■
FULL-CLOSE POSITION
Turn manual close switch on or apply 0% setpoint signal
and adjust the 0% position with full-close position adj. Ad-
justable within 0 to 25%. (factory setting: 0%)
■
FULL-OPEN POSITION
Turn manual open switch on or apply 100% setpoint signal
and adjust the 100% position with full-open position adj.
Adjustable within 75 to 100%. (factory setting: 100%)
Check once more full-close position and confirm there is no
deviation, if so, adjust repeatedly.
After adjustment, be sure to turn off manual switches.
■
DEADBAND
Protect from hunting, adjusting deadband switch to the
most significant value available.
It stops, immediately after a deviation goes into deadband
range and the control will be recovered when it is out of the
deadband range.
MEXM
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-4610 Rev.1 P. 4 / 5
