Variable Definition - Mitsubishi Electric MELSEC iQ-R Series User Manual

Variable definition

Configure the variables.
Basic
Window
Select a variable in the "Variable list" screen, right-click  shortcut menu [Modify]  [Basic] tab
Displayed items
Item
Class
Management Classification
VID
Variable Name
Comment
Unit
Data Type Settings
8 GEM COMPLIANT FUNCTIONS
212
8.11 Variable Setting
Description
Configure the variable attribute.
• SV: state variable
• ECV: Equipment constant
• DVVAL: Discrete variable
• MEMBER: variables used as list members
Displays the management classification.
• System: variable defined in advance by the SECS/GEM communication software.
• Equipment: newly added variable
Configure the variable ID.
A unique value is set to VID in all classes except for MEMBER class.
Configure the variable name.
Configure a comment for the variable.
Select a unit for the value defined in GEM.
Data Type Configure the data type to be stored in the register.
If SECS data stored in the register as a numerical value is to be sent as ASCII, the SECS/GEM
communication software can automatically convert the data and send it just by setting the respective
data type.
SECS Type Configure the format code of SECS data based on communication specifications.
Data Counts Configure the data count.
The Data Count displayed differs by the configured Data Type.
• BIN: Byte count
• ASCII/JIS8: Character count (one-byte character)
• LIST: Number of member variables configured by the list setting
• Other data types: Fixed to 1
Variable Length Select this checkbox to configure the data count to a variable length.
The Variable Length setting is enabled when the data type is "ASCII" or "LIST".
Operation when the variable length was configured is as follows.
• ASCII: the size up to Null stopper of the register is the number of data items.
• LIST: The number of member variables received from the programmable controller CPU is the
number of data items.
[List Setup] button Configure the member variables.
Available when the data type is "LIST".
For more details, refer to the following:
Page 215 List setting