36
4 FUNCTIONS
4.7 Alert Output Function
4.7
Alert Output Function
This section describes process alarms and rate alarms used for the alert output function.
Process alarm
Outputs an alert when a digital operation value falls within the preset alert output range.
Operation
■
Operation performed when an alert is output
When a digital operation value is equal to or greater than 'CH1 Process alarm upper upper limit value' (Un\G514), or the value
is equal to or smaller than 'CH1 Process alarm lower lower limit value' (Un\G520) and the value enters the alarm output range,
an alert is output as follows.
• Alarm ON (1) is stored in 'Alert output flag (Process alarm upper limit)' (Un\G36) or 'Alert output flag (Process alarm lower
limit)' (Un\G37).
• 'Alert output signal' (Un\G69, b8) turns on.
• The ALM LED turns on.
• An alarm code is stored in 'Latest alarm code' (Un\G2). (
The conversion on a channel where an alert was output continues.
ON
ON
ON
ON
OFF
OFF
OFF
OFF
Lower lower limit value
Lower upper limit value
Upper lower limit value
Upper upper limit value
Alert
Alert
Alert
Alert cleared
Alert cleared
Alert cleared
Alert output range
Out of alert output range
Included
Digital operation value
Time (t)
'CH1 Digital operation
value' (Un\G402)
'CH2 Digital operation
value' (Un\G602)
'CH1 Alert output flag
(Process alarm upper limit)'
(Un
\
G36, b0)
'CH1 Alert output flag
(Process alarm lower limit)'
(Un
\
G37, b0)
'CH2 Alert output flag
(Process alarm upper limit)'
(Un
\
G36, b1)
'Alert output signal'
(Un
\
G69, b8)
Summary of Contents for MELSEC iQ-F
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