Mitsubishi Electric MELSEC iQ-R User Manual page 81

Restarting the logging
To restart logging, check that ON (1) is stored in 'CH1 Logging hold flag' (Un\G409) and turn off 'CH1 Logging hold request'
(Y1). After logging is restarted, a value is stored from the start buffer memory area of Logging data area (Un\G10000 to
Un\G99999). In addition, OFF (0) is stored in 'CH1 Logging hold flag' (Un\G409).
It may take time until ON (1) is stored in 'CH1 Logging hold flag' (Un\G409) after 'CH1 Logging hold request' (Y1) is turned on.
'CH1 Logging hold request'
(Y1)
'CH1 Logging hold flag'
(Un\G409)
Logging status Logging
Performed by the A/D converter module.
Performed by a program.
Logging does not stop when 'CH1 Logging hold request' (Y1) is turned off before ON (1) is stored in 'CH1 Logging hold flag'
(Un\G409).
'CH1 Logging hold request'
(Y1)
'CH1 Logging hold flag'
(Un\G409)
Logging status
Performed by the A/D converter module.
Performed by a program.
(1) Logging does not stop.
■Buffer memory area status when logging is restarted
The following table shows the status of each buffer memory area when logging is restarted.
Buffer memory area
'CH1 Head pointer' (Un\G436, Un\G437)
'CH1 Latest pointer' (Un\G438, Un\G439)
'CH1 Number of logging data' (Un\G440, Un\G441)
'CH1 Trigger pointer' (Un\G442, Un\G443)
'CH1 Trigger generation time' (Un\G453 to Un\G457)
Logging data area (Un\G10000 to Un\G99999)
OFF(0)
Logging
Logging hold
post-trigger data
OFF(0)
Logging Logging post-trigger data
ON(1) OFF(0)
Logging
Logging
Value status
Values are initialized.
The values before logging is restarted are not initialized.
After logging is restarted, values are stored in the start address and later of
each channel. To refer to the logging data, check for valid data with 'CH1
Number of logging data' (Un\G440, Un\G441).
(1)
1 FUNCTIONS
1.14 Normal Logging Function
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