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MES INTERFACE FUNCTION CONFIGURATION TOOL
7.8 Device Tag Setting
7.8.1 Setting items in Device Tag setting
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1
OVERVIEW
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SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
SETTINGS AND
PROCEDURE TO
OPERATION
5
INSTALLATION AND
UNINSTALLATION
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FUNCTIONS
7
MES INTERFACE
FUNCTION
CONFIGURATION TOOL
8
DB CONNECTION
SERVICE AND
SETTING TOOL
(c) Do not sample
The tag is not sampled.
(1) Select [Do not sample] in the cases shown below.
This setting can reduce the load of the MES interface module.
• Tags for which [Array setting] is set
• Tags that perform writing only
• Tags that use handshaking for sampling device values
For handshaking, refer to the following:
Section 7.10.2 (8) Handshake operation
• When reserving the tag
(2) Tags with [Do not sample] setting cannot be selected in the items provided for
tag read setting. (Except for the case where the trigger condition is set to
[Handshake operation].)
• Tag component value for [Select/Update/Delete conditions] of [Select] in
[Communication action], etc.
(3) When a system switching occurs to the Redundant CPU, collection of device
tag may stop for about 15 seconds.
(3) Enhance sampling efficiency
If the [Enhance sampling efficiency] box is checked, sampling and reading of tag data
under handshake operation can be executed at high speed.
This can be selected when device numbers of all the devices registered to the tag are
sequential.
This is not selectable when [Array setting] is set.
(4) Prohibit data writing
Set whether to enable or disable writing data to the tag.
This is not selectable when [Array setting] is set.
Tags for which data writing is prohibited cannot be selected in the setting items
provided for writing to tags.
• [Completion notification] of [Handshake operation], substitution tags of
[Select] in [Communication action], etc.