YOKOGAWA AE100D, Инструкция по эксплуатации

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IM 1E7B0-02E 8-3
8. ACTUAL OPERATION
8.2 Self-diagnostics
Functions
• The self-diagnostics 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
A60 to N60 SELF CHECK parameter.
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
or less, 4mA, HOLD or 21.6mA or more, as selected
in 4-20 ALM OUT (out-put current during alarm).
• An alarm (status contact output) is output for any of
the errors indicated in the table at right.
LED
Contact
output
Current
output
Totaliza-
tion pulse
Display
AE
Display on BT
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
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
EMPTY PIPE
MULTI RANGE ERROR
OFF ON Normally Normally
Flash-
ing
OFF
Note: As selected in 4-20 ALM OUT(output current during alarm)
Fixed
(See
note.)
Stop
8.2.2 Error Description and Countermeasures
02
03
04
05
08
09
16
17
18
19
21
06
µ
P FAULT
EEPROM FAULT
A/D(H) FAULT
A/D(L) FAULT
VEL. SAPN>10m/s
VEL. SAPN<0.3m/s
P.SPAN<0.0001p/s
T.SPAN>1000p/s
T.SPAN<0.0001p/s
4-20 LMT ERROR
MULTI RANGE ERROR
Microprocessor error
EEPROM error
A/D converter (high frequency side) error
A/D converter (low frequency side) error
Setting for span flow velocity exceeds 11 m/s
Setting for span flow velocity is 0.2m/s or below
Pulse output rate exceeds 1100 p/s, at 50%
DUTY Pulse output rate exceeds 1000 p/s,
at 0.5 ms pulse width
Pulse output rate exceeds 500 p/s at 1 ms
pulse width
Pulse output rate exceeds 25 p/s at 20 ms
pulse width
Pulse output rate exceeds 15 p/s at 33 ms
pulse width
Pulse output rate exceeds 10 p/s at 50 ms
pulse width
Pulse output rate exceeds 5 p/s at 100 ms
pulse width
Pulse output rate is 0.00005 p/s or below
Totalization rate exceeds 1100 p/s
Totalization rate is 0.00005 p/s or less
Analog low limit > Analog high limit
Pipe is not filled with fluid or insulating material
attached to electrode.
In Auto 2 range, 1st range>2nd range
SIGNAL OVERFLOW
AE Display on BT Error Contents Countermeasures
Check for the following :
-Mixup of the signal, power supply,
execution, and other cable.
-Stray electorical currents in the
measured liquid.
-Improper grounding
Contact the nearest Yokogawa
office, or service center
Contact the nearest Yokogawa
office, or service center
Change setting
Fill the flow tube with fluid or clean
the flow tube inside
Change setting
Excessive input signal
07 COIL OPEN Flow Tube coil open-circuit
P.SPAN>1000p/s 10
11
P.SPAN>500p/s
12 P.SPAN>25p/s
13 P.SPAN>15p/s
14
P.SPAN>10p/s
15 P.SPAN>5p/s
20 EMPTY PIPE