Mitsubishi Electric Melsec Q Series User Manual page 72

3
SPECIFICATIONS
(2) MES interface module function list
Function
DB interface function
Tag function
Trigger monitoring
function
Trigger buffering
function
SQL text transmission
function
(Communication action)
Stored procedure call
function
(Communication action)
Arithmetic processing
function
(Operation action)
Program execution
function
DB buffering function
XML processing function
Time synchronization
function
3
- 13 3.3 Function List
Table 3.9 MES interface module function list
Executes access to the database in units of jobs.
Collects device data of the programmable controller CPUs on the network in units of
tags.
By allocating database fields to tag components, the DB interface function enables the
following.
• Database value reading/writing
• Reading/writing of programmable controller CPU device data specified with tag
components
Monitors values such as the time and tag values, and when the trigger condition
changes from false to true (when the conditions are met), starts a job.
When multiple sets of conditions for data transmission are met in a concentrated
manner, their data and trigger times are buffered in the module's internal memory so that
actions (data operation/transmission) can be executed later using the buffered data.
Even if the frequency of data transmission triggers is high, jobs are executed without
missing any trigger.
Automatically creates an SQL text and communicates with the database.
The following commands can be selected for the SQL text.
• Select/MultiSelect
• Update
• Insert
• Delete
A function to startup stored procedure in the database.
Performs operations for tag component values.
Executes programs in the application server computer before execution of the first action
and after execution of the last one in a job.
Buffers SQL texts into a CompactFlash card when they cannot be sent due to network
disconnection or failure of the database server computer.
After recovery, the buffered SQL texts are automatically sent to the database. (Manual
operation is also possible.)
Processes execution of requests made by user applications using XML format
messages.
The XML processing function allows the following instructions for job execution.
• One-shot execution of a job
• Validating a job (The job is executed when the trigger conditions are met.)
• Invalidating a job (The job is not executed even if the trigger conditions are met.)
Makes the time of the MES interface module synchronized with the time of the SNTP
server computer on the network or a programmable controller CPU (No.1 CPU in the
multiple CPU system).
Description
Reference
section
Section 6.1
Section 7.10
Section 7.11
Section 6.1.3
Section 7.8
Section 6.1.4
Section 7.10.2
Section 6.1.5
Section 7.10.1
Section 6.1.6
Section 7.11.2
Section 7.11.3
Section 6.1.8
Section 7.11.4
Section 6.1.9
Section 7.10.3
Section 6.1.10
Section 7.6.4
Section 7.10.4
Section 7.13.6
Section 6.2
CHAPTER 9
Section 6.3
Section 7.6.2