Bfm#1 To 4] Event - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U
8.2.2

[BFM#1 to 4] Event

The ON/OFF status of each bit indicates the status of each channel.
The bit assignment is the same for all channels.
BFM No.
CH1 CH2 CH3 CH4
#1 #2 #3
Event
Bit
b0 Input error (upper limit)
b1 Input error (lower limit)
b2 Cold contact temperature compensation data error
b3 A/D converted value error
b4 Alarm 1
b5 Alarm 2
b6 Alarm 3
b7 Alarm 4
b8 Loop breaking alarm
b9 Heater disconnection alarm
b10 Current error when output is OFF
b11 ST (startup tuning) being performed
b12 Decimal point position
b13 MANUAL mode transition completed flag
b14 AT (auto tuning) being performed
b15 Temperature rise completed flag
Explanation of operation of the temperature rise completed flag (b15)
This bit notifies that the measured value (PV) reaches near the set value (SV).
When the measured value reaches the temperature rise completion range (BFM#236) and the soak time
(BFM#237) is finished, temperature rise completed flag (b15) turns ON.
Set value (SV)
Temperature rise
completed flag
(b15)
78
#4 Event (Refer to the following)
Item
→ For details on the temperature rise completion range, refer to Subsection 8.2.58.
→ For details on the temperature rise completion soak time, refer to Subsection 8.2.59.
Temperature rise
completion soak
time (BFM#237)
ON
OFF
Description
Turns ON when input value is over scale.
Turns ON when input value is under scale.
Turns ON when an error has been caused by noise or when a
failure has occurred in the 4LC.
Turn the power ON again, and check for changes in the state. If no
improvement is obtained, consult a Mitsubishi Electric distributor.
Turns ON when an alarm 1 has occurred.
Turns ON when an alarm 2 has occurred.
Turns ON when an alarm 3 has occurred.
Turns ON when an alarm 4 has occurred.
Turns ON when a loop breaking alarm has occurred
Turns ON when a heater disconnection alarm has occurred.
Turns ON when a current error occurs while output is OFF.
Remains ON while startup tuning is being performed.
Turns ON when input range is set to "0.1 C/ F".
0 : 1 C/ F, mV
1 : 0.1 C/ F
Turns ON when transition to manual mode is completed.
0 : AUTO mode
1 : MANUAL mode
Remains ON while auto tuning is being performed.
Turns ON when the temperature rise completion soak time is
finished within the temperature rise completion range.
Measured value(PV)
8 Buffer Memory
8.2 Buffer Memory Details
Initial
R/W
value
- R
Description
Temperature rise
completion range (BFM#236)
Backup
-