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V: 1.0 Revised: Jan. 2018
34
AcuDC 240 Series
DC Energy & Power meters
In AO parameter setting mode, press ‘V/A’ until the screen ‘Ao 2P’
displays (as shown in Fig 3-22). It is AO2 parameter setting. There
are three options: 0: voltage; 1: current; 2: power. Press ‘F’ key to
select the parameter number (0, 1, or 2), and then press ‘V/A’ key
to confirm and scroll to the next screen setting page. Fig 3-22
shows the AO2 is set as voltage.
In AO parameter setting mode, press ‘V/A’ until the screen ‘Ao 2L’
displays (as shown in Fig 3-23). It is AO1 lower limit setting, range
is ‘0.00 ~ 1.00’. There is no ‘sign’ digit when the limit is 0. When
the limit is not 0, the ‘sign’ digit will be visible, the sign can be
adjusted by moving the cursor to the digit. Press ‘F’ to edit the
value, and then press ‘V/A’ key to confirm and scroll to the next
screen setting page. Fig 3-23 shows the AO1 lower limit is set as 0.
In AO parameter setting mode, press ‘V/A’ until the screen ‘Ao
2H’ displays (as shown in Fig 3-22). It is the AO2 upper limit
setting, range is ‘-100% ~ +100%’. The entire upper limit’s absolute
value cannot be smaller or equal to the lower limit’. Under no
circumstance can the upper limit be 0. Press ‘F’ to edit the value,
and then press ‘V/A’ key to confirm and scroll to the next screen
setting page. Fig 3-24 shows the AO1 up limit is set as +100%.
Fig 3-22 AO2
Parameter Setting
Fig 3-23 AO2 Lower
Limit Setting
Fig 3-24 AO2 Up
Limit Setting
SET
NOTE: 241 and 242 do not have this screen. AO1 is set as what is being measured.
SET
SET
3.4.2 RO parameter setting
In the system parameter setting operation page after successfully entering the password,
hold the ‘V/A’ key for 3 seconds to enter the RO parameter setting page. The I/O module
that contains the Relay Output function offers two RO channels. There are three
modes for RO: Latch, Momentary and alarm. The mode setting depends on the object
requirement i.e. A circuit breaker use Momentary. The momentary delay time is 300-5000
ms. Due to the relay action time error, this delay time has up to 3ms error.
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