Chapter 6 Functions 6 - 1 To; Db Interface Function; Db Interface Function Operation - Mitsubishi Electric Melsec Q Series User Manual

6
FUNCTIONS
CHAPTER 6 FUNCTIONS
This chapter explains the MES interface functions of the MES interface module.
The MES interface functions are set using MES Interface Function Configuration Tool.

6.1 DB Interface Function

The DB interface function executes access to the database in units of jobs.

6.1.1 DB interface function operation

The operation of the DB interface function is shown below.
Programmable
controller CPU
Device
D1000
6
- 1 6.1 DB Interface Function
6.1.1 DB interface function operation
Chapter 7 MES INTERFACE FUNCTION CONFIGURATION TOOL
MES interface module
Tag 1
Trigger monitoring
Trigger buffering
Communication action 1 (Update)
Component
Operation action 2
Communication action 3 (Insert)
Communication action 10 (Select)
Program execution
*1
Figure 6.1 DB interface function operation
*1 Collects tag data.
*2 Activates a job.
*3 Stores data and trigger times temporarily in the module's internal memory when loads are
concentrated.
Section 6.1.5 Trigger buffering function
*4 Accesses the database and performs arithmetic processing.
• Section 6.1.6 SQL text transmission (Communication action)
• Section 6.1.8 Arithmetic processing function (Operation action)
*5 Executes programs.
*6 Temporarily stores SQL texts in a CompactFlash card when a communication error occurs.
Section 6.1.10 DB buffering function
Job 1
*2
*3
Action *4
Executed
in order
*5
DB buffering *6
Section 6.1.3 Tag function
Section 6.1.4 Trigger monitoring function
Section 6.1.9 Program execution function
Database server computer
Database
Execute
file
Application server computer