277
CHAPTER 11 TROUBLESHOOTING
11
11.
3
List
of
A
la
rm
Codes
11.3
List of Alarm Codes
This section lists alarm codes.
Alarm code
(hexadecimal)
Classification
Cause
Operation at alarm
occurrence
Alarm details
Action
01
AH
Minor error
The temperature
process value (PV) has
exceeded the
temperature
measurement range that
was set as the input
range.
• The ALM LED flashes.
• CH
Alert occurrence flag
(RX18 to RX1B) turns on.
• CH
Input range upper
limit (b0 of RWr4 to RWr7)
turns on.
• The process value of
the error channel is
stored in Process
value (PV).
• The manipulated value
of the error channel is
stored in Manipulated
value (MV).
• The set value of the
error channel is stored
in Set value (SV).
When the temperature process
value (PV) has returned within
the setting range, the
corresponding bit of CH
Alert
definition (RWr4 to RWr7) and
CH
Alert occurrence flag
(RX18 to RX1B) automatically
turns off. Latest warning code
(RWr2) is automatically cleared
when the temperature process
value (PV) has returned within
the setting range.
02
AH
Minor error
The temperature
process value (PV) is
below the temperature
measurement range that
was set as the input
range.
• The ALM LED flashes.
• CH
Alert occurrence flag
(RX18 to RX1B) turns on.
• CH
Input range lower
limit (b1 of RWr4 to RWr7)
turns on.
03
AH
Minor error
A loop disconnection has
been detected.
• The ALM LED flashes.
• CH
Alert occurrence flag
(RX18 to RX1B) turns on.
• CH
Loop disconnection
detection (b13 of RWr4 to
RWr7) turns on.
When the system has been
restored to the state before
disconnection, CH
Loop
disconnection detection (b13 of
RWr4 to RWr7) and CH
Alert
occurrence flag (RX18 to RX1B)
automatically turn off. Latest
warning code (RWr2) is
automatically cleared.
06
AH
Minor error
Alert 1 has occurred.
• The ALM LED turns on.
• CH
Alert occurrence flag
(RX18 to RX1B) turns on.
• CH
Alert 1 (b8 of RWr4
to RWr7) turns on.
When the temperature process
value (PV) has returned within
the setting range, the
corresponding bit of CH
Alert
definition (RWr4 to RWr7) and
CH
Alert occurrence flag
(RX18 to RX1B) automatically
turns off. Latest warning code
(RWr2) is automatically cleared
when the temperature process
value (PV) has returned within
the setting range.
07
AH
Minor error
Alert 2 has occurred.
• The ALM LED turns on.
• CH
Alert occurrence flag
(RX18 to RX1B) turns on.
• CH
Alert 2 (b9 of RWr4
to RWr7) turns on.
08
AH
Minor error
Alert 3 has occurred.
• The ALM LED turns on.
• CH
Alert occurrence flag
(RX18 to RX1B) turns on.
• CH
Alert 3 (b10 of RWr4
to RWr7) turns on.
09
AH
Minor error
Alert 4 has occurred.
• The ALM LED turns on.
• CH
Alert occurrence flag
(RX18 to RX1B) turns on.
• CH
Alert 4 (b11 of RWr4
to RWr7) turns on.
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