LSIS XBE-DC08A, Руководство пользователя, Страница: 125 / 1284

M
ain
Chapter 1 Configuration and Operation Mode of Programs
1-28
1.3.3 Data retain area setting
In case you want to keep the data necessary for operation and the data made during operation when PLC stops and restarts,
Default(automatic) Variable Retain is used and some area of M area can be set as Retain area through parameter setting
The following is characteristic table about the device available for Retain setting
Device
Retain
setting
Retain Characteristic
Default O Depend
on
setting
As for automatic variable area, Retain setting is available
M O As for internal contact point area, Retain setting is available at parameter
K X O In case of power failure, contact point is kept
F X X System flag area
U X X Analog data register (Retain is not available)
L X X
High speed link/P2P service status contact point of communication module (Retain is
available)
N X O P2P service address area of communication module (Retain is available)
R X O Flash memory dedicated area (Retain is available)
Remark
1) K, N, R devices are retained basically.
2) K, L, N devices can be deleted through “Clear PLC” of XG5000 online menu.
3) For more detail, refer to “Online” of XG5000 user manual.
(1)Initialization of data according to restart mode
There are three variable related with restart mode (Default, initialization and retain variable). Initialization method about each variable in
case of executing restart mode is as follows.
(2)Operation of data retain area
Method on deleting the Retain data is as follows.
- RESET through XG5000 (Overall Reset)
- Execute “Clear PLC” through XG5000 at STOP mode
- Writing by program (Initialization program recommended)
- Writing ‘0’ FILL etc at XG5000 monitor mode
Mode
Variable assignment
COLD WARM
Default Initialized as ‘0’ Initialized as ‘0’
Retain Initialized as ‘0’ Hold previous value
Initialization Initialized as user defined value Initialized as user defined value
Retain & Initialization Initialized as user defined value Hold previous value