AND Weighing Indicator AD-4401, Instruction Manual

Page: 77 / 90

75
Item
checked
Checking procedures Display
Key Switches
(O) Mark of the pressed key moves upward.
Control I/O
<Input terminal number>
(O) Mark of the ON-terminal moves upward.
<Output terminal number>
The terminal of the displayed number is on.
Standard Serial
Output
Pressing the [ENTER] key sends “1 2 3 <CR><LF>” at the baud rate set
in the general function setting.
OP-01 BCD
<Hold>
(O) Mark moves upward when “Hold” is on.
<Output terminal number>
The terminal of the displayed number is on.
OP-03
(RS-422/-485),
OP-04
(RS-232C)
Pressing the [ENTER] key sends “1 2 3” based on setting made in the
general functions. If the same data as the sent data is received, “PASS”
will be displayed.
Setpoints and
OP-05 Setpoint
Unit
<Terminal number>
The number of COMMON terminal of the digit to be read is shown.
<Set value>
The value of the digit to be read is shown.
OP-07 Analog
Output
A current value (mA) being output is displayed.
The current value can be changed with the [
∧
] or [
∨
] key.
A load cell signal value being input is displayed in the unit of mV/V.
When this value is within a range of 0 to 2 mV/V with no load, it is likely
that the load cell is damaged or it is connected improperly.
Since an offset can be added to an A/D input, using the [
∧
] or [
∨
], the
A/D converter can be checked for operations without applying a load to
the load cell.
Procedure Problem Cause
1
With +SIG and –SIG Load Cell terminals shorted, 0.0
mV/V is not displayed.
Load Cell excitation voltage or output
voltage is incorrect, or Load Cell is
wired incorrectly.
2
When not loaded, the displayed value is out of a range
of 0.0 mV/V to 2.0 mV/V.
Damaged Load Cell
3
When loaded, the displayed value is smaller than that of
procedure 2, or larger than 3.2 mV/V. Load Cell is wired incorrectly, or
incorrect rate of Load Cell.
4
* When the [
∧
] or [
∨
], key pressed, the displayed
value does not increase.
Load Cell is incorrectly wired.
A/D Converter
* Note the value increase for future reference.
ROM version
ROM version is displayed.
CPU Version
CPU version is displayed.