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4 FUNCTIONS
4.13 Logging Function
Resuming the logging
It may take time until ON (1) is stored in 'CH1 Logging hold flag' (Un\G409) after 'CH1 Logging hold request' (Un\G471) is
changed off
→
on.
To resume logging, check that ON (1) is stored in 'CH1 Logging hold flag' (Un\G409) and change 'CH1 Logging hold request'
(Un\G471) on
→
off. After logging resumes, the value is stored from the start buffer memory area of CH1 Logging data
(Un\G10000 to Un\G19999).
In addition, OFF (0) is stored in 'CH1 Logging hold flag' (Un\G409).
Logging does not stop when 'CH1 Logging hold request' (Un\G471) is changed from on
→
off before ON (1) is stored in 'CH1
Logging hold flag' (Un\G409).
■
Buffer memory area status when logging resumes
The following table shows the buffer memory area status when logging resumes.
Item
Status of Buffer Memory Areas
'CH1 Head pointer' (Un\G434)
Values are initialized.
'CH1 Latest pointer' (Un\G435)
'CH1 Number of logging data' (Un\G436)
'CH1 Trigger pointer' (Un\G437)
'CH1 Trigger generation time' (Un\G444 to Un\G448)
CH1 Logging data (Un\G10000 to Un\G19999)
The values before logging resumes are not initialized.
After logging resumes, values are stored from the start address of CH1 Logging data
(Un\G10000 to Un\G19999). To refer to the logging data, check which area has valid data
with 'CH1 Number of logging data' (Un\G436).
OFF(0)
OFF(0)
ON(1)
OFF(0)
OFF(0)
ON(1)
Logging
Logging
Logging post-trigger
data
Logging held
Logging status
Controlled by the multiple input module
Controlled by the program
'CH1 Logging hold request'
(Un\G471)
'CH1 Logging hold flag'
(Un\G409)
OFF(0)
OFF(0)
ON(1)
OFF(0)
Logging
Logging
Logging post-trigger data
Logging status
Controlled by the multiple input module
Controlled by the program
The logging does not stop.
'CH1 Logging hold request'
(Un\G471)
'CH1 Logging hold flag'
(Un\G409)
Summary of Contents for MELSEC iQ-F
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