Yokogawa ADMAG CA - Manual (Page 69)

IM 1E8B0-01E
8-4
8. ACTUAL OPERATION
8.2 Self-diagnostics Functions
• The self-diagnostic function displays instrument internal errors, input/output signal
abnormalities, setting errors, and other problems.
• When an alarm occurs, an alarm number announcing that an error has occurred is
superimposed on the normal data display.
However, alarms are only displayed during normal flow rate data display mode and
when parameter numbers are changed in the setting mode. (Alarms are not displayed
when data items are being changed.)
• When the BT200 is used, alarms are displayed in the A to N60 SELF CHECK
parameter. If an error is detected and ERROR appears in the display, investigate the
nature of the error.
8.2.1 Display and Output Status during Alarm occurrence
• If an error occurs, the
panel display LED
flashes and an alarm
number is superimposed
on the normal display.
During this time the
current output is fixed to
2.4mA max., 4mA,
HOLD or 21.6mA max.,
as selected in 4-20 ALM
OUT (output current
during alarm).
• An alarm (status contact
output) is output for any
of the errors indicated in
the table at right.
Note : As selected in 4-20 ALM OUT (output current during alarm)
LED
Contact
output
Current
output
Totaliza-
tion pulse
Display
CA Display on BT
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
GOOD
ERROR
µ
P FAULT
EEPROM FAULT
A/D(H) FAULT
A/D(L) FAULT
SIGNAL OVERFLOW
COIL OPEN
VEL. SAPN>10m/s
VEL. SPAN<0.3m/s
P.SPAN>1000p/s
P.SPAN>500m/s
P.SPAN>25p/s
P.SPAN>15p/s
P.SPAN>10p/s
P.SPAN>5p/s
P.SPAN<0.0001p/s
T.SPAN>1000p/s
T.SPAN<0.0001p/s
4-20 LMT ERROR
OFF ON Normally Normally
Flash-
ing
OFF Fixed
(See
note.)
Stops