Mitsubishi Electric FATEC FR-A800 Manual page 38

2
UNDERSTANDING INVERTER SYSTEM
(3) Trigger settings
Setting a trigger allows sampling to start when a fault occurs or sampling item conditions are
met.
Symbol Name
A Trigger data
B Trigger type
C Trigger level
D Trigger position
E Collection mode
Remark
A
B
C
D
E
Select the signal that triggers the start of sampling. The trigger signals are as follows.
 Not used
 Analog CH, digital CH (Sampling starts if the sampling items meet the conditions.)
 Fault trigger (Sampling starts if a fault occurs.)
Select the conditions to determine trigger condition satisfaction from rise or fall. (Only
appears when trigger data is analog CH or digital CH.)
 Rise
Analog CH: When the value specified by the trigger level is exceeded
Digital CH: When the signal changes from OFF to ON
 Fall
Analog CH: When the value drops to a level lower than the trigger level
Digital CH: When the signal changes from ON to OFF
Set the threshold to determine trigger condition satisfaction by the analog signal. (Only
appears when trigger data is analog CH.)
Set the ratio of the sampling data to collect before the trigger conditions are met. (Only
appears when trigger data is the analog CH, digital CH, or fault trigger.)
Set whether the sampling should be continuously operated.
Single: Sampling is performed only once.
Continuous: Sampling is performed continuously.
• Activation of analog data
The trigger will not start if the trigger conditions have already been met when
selected. If "Rise" is selected, the trigger occurs when the set value in "level" is
exceeded, and with "Fall", the trigger occurs when the set value drops to a level lower
than "level".
Example: If trigger start condition is "Rise" and the level is set to "3"
If the level is 4 when sampling starts, the trigger will not start. When
changed from less than 3 to 3 or more, the trigger conditions are met and
sampling will start.
• If the machine speed is displayed by setting M000 (Pr.37) Speed display to a value
other than 0
To set "Output frequency" or "Frequency" as the trigger data, enter the trigger
activation machine speed as is to the "level" column.
For example, if M000 (Pr.37) Speed display is set to 1800 with "Output frequency" as
the sampling item, and the trigger is to be activated at "900", input "900" as is to the
"level" column.
Function and description
2.6 Inverter setup software
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