YOKOGAWA YTA710, Руководство пользователя

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<4. Self-Diagnostics>
4-5
IM 01C50T03-02EN
NOTE
Also, the buffers are synchronized when the
temperature transmitter is turned on.
(3) History number
Up to 59 records are assigned with history
numbers 0 to 58. The record assigned history
number 0 is the latest one.
(4) Parameter Display window
The Parameter Display buffer holds all 59 data
records, however, it holds only five display
parameter records. Therefore, you can select
and display any five records out of the 59
records. The selected five records are called
records of the “Parameter Display window”. The
five records of the Parameter Display window
are called LOG1 to LOG5 (and LOG1 has the
latest record).
0
1
2
3
24
25
LOG 1(P20:ALARM LOG1,
P21:LOG TIME1)
26 LOG 2(P22:ALARM LOG2,
P23:LOG TIME2)
27 LOG 3(P24:ALARM LOG3,
P25:LOG TIME3)
Parameter
Display window
28 LOG 4(P26:ALARM LOG4,
P27:LOG TIME4)
29 LOG 5(P28:ALARM LOG5,
P29:LOG TIME5)
30
57
58
Set the following parameters to set up the
Parameter Display window.
Parameter Setting
value
Remarks
P19:AL
LOG NO
0 to 55 Specify a history number to
position the beginning of the
Parameter Display window.
The fifth record from the
history number you specified is
the Parameter Display window.
If “55” is specified, the LOG5 is
made invalid.
(5) Log data
The log data of LOG1 to LOG5 consists of the
alarm data and the time information at this time.
When the following parameters are read, the
log data is displayed.
Parameter Description
P20:ALARM LOG1 Alarm data of LOG1
P21:LOG TIME1 Record time of LOG1
P22:ALARM LOG2 Alarm data of LOG2
P23:LOG TIME2 Record time of LOG2
P24:ALARM LOG3 Alarm data of LOG3
P25:LOG TIME3 Record time of LOG3
P26:ALARM LOG4 Alarm data of LOG4
P27:LOG TIME4 Record time of LOG4
P28:ALARM LOG5 Alarm data of LOG5
P29:LOG TIME5 Record time of LOG5
The alarm data of P20, P22, P24, P26 and P28
is the same as obtained by A to L, O to P, R
60:SELF CHECK of each item.
The recording time of P21, P23, P25, P27
and P29 is equivalent to the period of time
when the transmitter is shipped from the
factory and when the transmitter operating
time (until LOG1) is recorded. The operating
time is displayed in “DDDDDdHH:MM” format.
“DDDDD” is the number of days. The number
of digits may increase or decrease within the
range of 1 to 5 days according to the actual
number of days. “HH” is hours, and “MM” is
minutes.
(6) Empty log data
Although the maximum number of history
records is 59, in actuality, less than 59 records
may have been recorded, such as when the
operating time span from when the temperature
transmitter was started is short.
In such a case, unrecorded logs may be
included, depending on the setting of the
Parameter Display window. At this time, the
value of recording time parameters (P21, P23,
P25, P27, and P29) is blank for the data of
unrecorded logs. Therefore, it is possible to
judge the validity of log data using these values.