Warning Output Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.7

Warning Output Function

This function outputs a warning when the sampling pulse number enters the preset warning output range.
Sp
Warning output setting
value upper/upper limit
Warning output setting
value upper/lower limit
Warning output setting
value lower/upper limit
Warning output setting
value lower/lower limit
0
'CH1 Warning output flag' (Un\G8)
bit 0 (lower limit warning)
'CH1 Warning output flag' (Un\G8)
bit 8 (upper limit warning)
Sp: Sampling pulse number
t: Time
Operation
■Operation performed when a warning is output
When the sampling pulse number is greater than or equal to 'CH1 Warning output setting value upper/upper limit' (Un\G137)
or is less than or equal to 'CH1 Warning output setting value lower/lower limit' (Un\G140) and thus enters the warning output
range, a warning is output as follows.
• Range exceeded (1) is stored in bit 8 (upper limit warning) or bit 0 (lower limit warning) of 'CH1 Warning output flag'
(Un\G8).
• The ALM LED turns on.
In addition, an alarm code is stored in 'CH1 Alarm code' (Un\G10).
For details on the alarm codes, refer to the following.
Page 54 List of Alarm Codes
■Operation after a warning was output
After warning output, if the sampling pulse number is less than 'CH1 Warning output setting value upper/lower limit' (Un\G138)
or is larger than 'CH1 Warning output setting value lower/upper limit' (Un\G139) and thus no longer meets the conditions for
outputting warnings, Normal (0) is stored in bit 8 (upper limit warning) or bit 0 (lower limit warning) of 'CH1 Warning output flag'
(Un\G8).
Also, when Normal (0) is stored in bit 8 (upper limit warning) and bit 0 (lower limit warning) of the warning output flag for all
channels, the ALM LED turns off. The alarm code stored in 'CH1 Alarm code' (Un\G10) is not cleared. To clear the alarm
code, after Normal (0) is stored in bit 8 (upper limit warning) and bit 0 (lower limit warning) of 'CH1 Warning output flag'
(Un\G8), turn on and off 'CH1 Error reset request' (Y8).
Count cycle
OFF
OFF
ON
ON
t
1 FUNCTIONS
1.7 Warning Output Function
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