3 parameter lists for heat trace monitoring, 3 parameter lists for heat trace monitoring -23 – Yokogawa EJA440E User Manual
Page 70
<4. Diagnostics>
4-23
IM 01C25T01-06EN
4.2.3.3 Parameter Lists for Heat Trace Monitoring
#
Parameter name
Default value
Explanation
1 Diag Error
0x0000
The results detected by ILBD or Heat trace monitoring are stored into this
parameter. Also the condition abnormality in the diagnostic process is
stored as an error.
2 Diag Option
0x08FC
The masking in this parameter enable to display each error message and
the status to the output signal or LCD.
The error assigned to each bit is corresponding to that of Diag Error.
Writable only when Diag Mode is "Stop".
3 Diag Out Option
Off
The error status can be output by 4-20 mA analog signal.
There are following three output modes; Off, Burnout, or Fall back.
4 Diag Fixed Out Val
21.6mA
Parameter for "Fall back" function in the Diag Out option.
The output value in 4-20 mA analog signal is specified when an alarm is
generated.
The value must be entered within 3.6 to 21.6 mA.
5 Snsr temp (Cap temp
*2
)
Measured capsule temperature value
6 Amp temp
Measured Amplifier temperature value
7 Flg temp
(
*1
)
Calculated flange temperature value
8 Flg Temp Coef
0
Coefficient to calculate flange temperature (Cf: Rt
1
/Rt
2
)
Rt
1
: Thermal resistance between the flange and capsule.
Rt
2
: Thermal resistance between the cupsule and amplifier.
9 Flg Temp Hi Alart Val
(Flg Temp High Limit
*2
)
120 deg C
Upper limit of
Flg temp
10 Flg Temp Lo Alart Val
(Flg Temp Low Limit
*2
)
-40 deg C
Lower limit of
Flg temp
11 DO Select
Off
See subsection 3.3.13 Status Output
12 DO Signal type
ON WHEN
AL DETECT
See subsection 3.3.13 Status Output
13 Digital Output
Off
See subsection 3.3.13 Status Output
*1:
The
Flg Temp Coef is 0 at the shipment so that the Flg temp outputs the same value as that of Snsr temp.
*2:
EJX HART 5 DTM based on FDT1.2.