226
(a) Method for clearing a warning or alarm
The method for clearing an error depends on the error type.
*1
A warning results in the following state five seconds after the error cause is removed.
• Warning flag (RX7) turns off.
• Latest warning code (RWr2) is cleared.
• The ERR. LED turns off.
*2
Latest warning code is stored in Latest warning code (RWr2). For example, when a minor error occurs and is eliminated
after a process alarm occurs, Latest warning code (RWr2) is cleared to 0 regardless of the occurrence of the alarm. The
warning codes can be checked in the error history on GX Works2. For the error history, refer to the following.
• Checking with the command execution of slave station (
• Error history
(address: A00H to FFFH) (
Ex.
Operation to clear Station number switch changing error (error code: 0940H)
For the method for clearing an alarm, refer to the following.
• List of Alarm Codes (
Error type
Clearing an error
Minor error
Warning
A warning is cleared five seconds after the error cause is removed.
Alarm
Temperature process
value excess of upper
limit of PV range
When the temperature process value (PV) returns to somewhere within the input range,
the alarm is automatically turned off.
Temperature process
value fall short of lower
limit of PV range
Loop disconnection
detection
When the cause of the loop disconnection is eliminated, the alarm is automatically turned
off.
Occurrence of alert 1
When the temperature process value (PV) returns to somewhere within the setting range
of alert, the alarm is automatically turned off.
Occurrence of alert 2
Occurrence of alert 3
Occurrence of alert 4
Occurrence of process
alarm upper limit alert
The error is automatically cleared when the temperature process value (PV) returns
within the set range between the process alarm upper lower limit value and the process
alarm lower upper limit value.
Occurrence of process
alarm lower limit alert
Occurrence of rate
alarm upper limit alert
When the temperature process value (PV) increases by a set value or smaller, or
decreases by a set value or larger, the alarm is automatically turned off.
Occurrence of rate
alarm upper limit alert
Station No.1
(normal)
Station No.1 (normal)
ON
ON
OFF
OFF
Warning flag (RX7)
Station number setting
switches
ERR. LED
Remote READY
(RXB)
Off
Station No.10 (error)
Off
0
Flashing
0
5 seconds
0940H
(station number switch changed error)
Latest warning code
(RWr2)
Controlled by the temperature control module
Summary of Contents for NZ2GF2B-60TCRT4
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