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6.1 DB Interface Function
6.1.3 Tag function
6
FUNCTIONS
6.1.3 Tag function
The tag function 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
For the tag function setting, refer to the following:
Section 7.8 Device Tag Setting
(1) Values assigned to tag components by the job are written to a programmable
controller CPU after all actions of the job are completed. Since these values
are occasionally written in two or more sequence scans, values from the
sequence program need to be referred after all data are written.
Use the handshake operation to run the sequence program with the
completion of writing all data.
Section 7.10.2 (8) Handshake operation
(2) For the tags for which [Enhance sampling efficiency] is selected, the tag data
can be read out at high speed when they are collected and when handshake
operation is performed.
Figure 6.3 Tag function
Component name
CPU name
Device
Data type
Device
D1000
D2000
D2001
D1000
D2000
Single
Double
CPU1
CPU1
Work_No
Parameter
CPU1
Read
Write
Programmable
controller CPU
MES interface module
Device tag name: Process1