9-2
■ Operation in case of PV input failure
(1) AL01, 02, or 03 occurs.
Control output: It is possible to make the settings so that the operation is
continued or discontinued.
Other operation: Operation is continued.
(2) Alarm occurs in cases other than those shown above.
All operations are continued.
The following table shows the indications and alarms of this unit by the sensor
type if PV input failure occurs:
● Thermocouple
● RTD
● DC voltage/DC current
Chapter 9. MAINTENANCE AND TROUBLESHOOTING
Failure status Range No. Indication value Alarm code
Burnout 84 (0 to 1V) Downscale (-3%FS) AL02
86 (1 to 5V) Downscale (-10%FS) AL02
87 (0 to 5V) Downscale (-3%FS) AL02
88 (0 to 10V) Downscale (0%FS) None
89 (0 to 20mA) Indefiniteness (near 0%FS) None
90 (4 to 20mA) Downscale (-10%FS) AL02
Failure status Range No. Indication value Alarm code
Sensor burnout Upscale (110%FS) AL01
CJ failure PV having incorrect cold AL03
contact compensation
Over-range, burnout 19 (PLII) 1365˚C (105%FS) AL01
Failure status Range No. Indication value Alarm code
RTD burnout Upscale (110%FS) AL01
A-wire burnout Upscale (110%FS) AL01
B-wire burnout Upscale (110%FS) AL01, AL03
C-wire burnout Upscale (110%FS) AL01, AL03
2- or 3-wire burnout Upscale (110%FS) AL01, AL03
A- and B-wire short-circuit
Downscale (-10%FS) AL02
A- and C-wire short-circuit
Downscale (-10%FS) AL02
A- and B-wire/A- and 41 (Pt100) -235˚C (-5%FS) AL02
C-wire short-circuit
A- and B-wire/A- and 42 (JPt100) -235˚C (-5%FS) AL02
C-wire short-circuit
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