Database Function Processing Time - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Database function processing time

Database operation by database access instruction
The table below lists the processing time under the following conditions:
Condition 1
• Number of records: 10000
• Number of fields: 16
The data type of the field is WORD (6 fields), LREAL (6 fields), WSTRING
(124 characters) (3 fields), and BOOL (1 field).
• Main key: Provided
• Functions that require access to files in the SD memory card except for the
database function are not active.
This section shows the time taken for the completion signal of the completion device to turn on from the execution of each
instruction of the database access instructions.
Instruction
Database import
Database export
Database connection
Database disconnection
Database record search
Database record addition
Database record update
Database record deletion
*1 After power-on, initial database access involves the diagnostics to check whether the database is corrupted, and thus it takes time to
execute the DBOPEN instruction.
■For the programmable controller CPU with firmware version earlier than "28"
The table below lists the processing time under the following conditions:
Condition
• Number of tables: 1
• Number of records: 10000
• Number of fields: 4
The data type of the field is specified as WORD, DWORD, WSTRING (16 characters), and WSTRING (32 characters).
• Index: specified
• Transaction: Provided (The DBINSERT/DBUPDATE/DBSELECT/DBDELETE instructions only are subject to this condition.)
• Functions that require access files in to the SD memory card except for the database access instruction are not active.
This section shows the time taken for the completion signal of the completion device to turn on from the execution of each
instruction of the database access instructions.
Instruction
Database import
Database export
Database connection
Database disconnection
Database record search
Database record addition
Database record update
Database record deletion
*1 After power-on, initial database access involves the diagnostics to check whether the database is corrupted, and thus it takes time to
execute the DBOPEN instruction.
APPX
922
Appendix 9 Processing Time
DBIMPORT
DBEXPORT
DBOPEN First time
Second time or later
DBCLOSE
DBSELECT
DBINSERT
DBUPDATE
DBDELETE
DBIMPORT
DBEXPORT
DBOPEN
DBCLOSE
DBSELECT
DBINSERT
DBUPDATE
DBDELETE
Condition 2
• Number of records: 10000
• Number of fields: 64
The data type of the field is WORD (20 fields), LREAL (20 fields),
WSTRING (124 characters) (6 fields), and BOOL (18 fields).
• Main key: Provided
• Functions that require access to files in the SD memory card except for the
database function are not active.
Time taken to complete the execution of
instruction
Condition 1
155s
75s
*1
150ms
105ms
30ms
700ms
700ms
550ms
700ms
Time taken to complete the execution of
instruction
320s
220s
*1
First time 590ms
Second time or later 140ms
3ms
180ms
210ms
260ms
300ms
Condition 2
255s
195s
150ms
105ms
30ms
750ms
800ms
600ms
1000ms