Mitsubishi Electric R60AD8-G User Manual page 74

Operation of a level trigger
To use a level trigger, set ON (1) to 'CH1 Logging hold request' (Un\G471) in advance. At the point where ON (1) has been set
to 'CH1 Logging hold request' (Un\G471), the module becomes the trigger condition wait status.
Data collection starts when the trigger condition has been satisfied, and stops when the set points of the data have been
collected.
'CH1 Logging hold request'
(Un\G471)
Trigger condition
established/unestablished
CH1 Logging data
(Un\G10000 to Un\G10999)
The data before the last 1000 points
are discarded.
A level trigger is detected on the refreshing cycle of the digital output value or the digital operation value.
Therefore, the data when a hold trigger is generated may not be stored in 'CH1 Logging data' (Un\G10000 to
Un\G10999) depending on the setting of the logging cycle. To store the data at the timing when a hold trigger
is generated in 'CH1 Logging data' (Un\G10000 to Un\G10999), arrange related settings so that the
conversion cycle of the monitoring target value (trigger data) and the logging cycle (actual logging cycle) have
the same time period.
Stored value of a buffer memory area to be monitored
Trigger setting
value
(1) The data at the timing when a trigger is generated is not stored in the buffer memory area.
• To refer to the logging data from the CPU module, hold (stop) the logging operation and check that ON (1) is
stored in 'CH1 Logging hold flag' (Un\G409).
■Checking that the logging has stopped
Check that 'CH1 Logging hold flag' (Un\G409) is ON (1).
1 FUNCTIONS
72
1.12 Logging Function
Controlled by the A/D converter module
OFF(0)
Unestablished
'CH1 Number of logging data' (Un\G436) ≤ 1000 points
Logging cycle
Conversion Conversion
cycle cycle
A trigger is
generated.
Time
ON(1)
Established
A hold trigger is generated.
The logging is held.
'CH1 Post-trigger
logging points'
(Un\G539)
(1)
Data are collected.
Data are collected.