Mitsubishi MELSEC iQ-F, Руководство пользователя

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4 FUNCTIONS
4.7 Alert Output Function
37
4
■
Operation after an alert was output
After an alert was output, if the digital operation value does not satisfy the alert output condition due to being smaller than
'CH1 Process alarm upper lower limit value' (Un\G516) or being greater than 'CH1 Process alarm lower upper limit value'
(Un\G518), Normal (0) is stored in a bit corresponding to the channel of 'Alert output flag (Process alarm upper limit)'
(Un\G36) or 'Alert output flag (Process alarm lower limit)' (Un\G37).
In addition, when all the bits of 'Alert output flag (Process alarm upper limit)' (Un\G36) and 'Alert output flag (Process alarm
lower limit)' (Un\G37) return to Normal (0), 'Alert output signal' (Un\G69, b8) turns off and the ALM LED turns off. However, the
alarm code stored in 'Latest alarm code' (Un\G2) is not cleared. Turn off
→
on
→
off 'Error clear request' (Un\G70, b15) to clear
the alarm code.
Detection cycle
When time average is specified, the function works at every interval of the time (for averaging). When count average is
specified, the function works at every count (for averaging).
When the sampling processing, and moving average are specified, this function works at every conversion period.
Detection target for outputting an alert
When using the digital clipping function, scaling function, and shift function, "CH1 digital operation value" (Un\G402) digitally
clipped, scale converted, and shifted are subject to alarm (process alarm).
Operation performed when disconnection is detected
When input type is set to "resistance temperature detector" or "thermocouple", 'CH1 Digital output value' (Un\G400) changes
according to 'CH1 Conversion setting at disconnection detection' (Un\G534), so process alarms may occur at the same time.
Setting procedure
1.
Set "Warning output setting (Process alarm)" to "Enable".
[Navigation window]

[Parameter]

[Module Information]

Module model name

[Module Parameter]

[Application setting]

[Warning output function (Process alarm)]
2.
Set values for "Process alarm upper upper limit value", "Process alarm upper lower limit value", "Process alarm lower
upper limit value", and "Process alarm lower lower limit value". The setting range is from -32768 to +32767
*1
.
*1 When "RTD" or "Thermocouple" is set as the input type, set it in units of 0.1

(

) unit.
Set values within the range satisfying the condition Process alarm upper upper limit value ≥ Process alarm
upper lower limit value ≥ Process alarm lower upper limit value ≥ Process alarm lower lower limit value. If a
value out of the range is set, a process alarm upper lower limit value setting range error (error code: 1B 

H)
occurs.