The GP has a block of internal addresses called the LS Area. (16 bit: word addresses)
Some of these addresses are pre-defined for specific uses. Others can be programmed at the user's discretion. |
LS Area Contents |
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Where the fundamental
information about the GP, such as clock data and screen number, is stored.
By default, this information is written into the PLC and can be accessed there. |
Used with Video displays and Trend graphs to write additional information into the PLC. |
This area is for the user to define Parts, Tags, and D-Script addresses.
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Stores special status information such as communication cycle time. |
GP Internal Use only - not for user defined addresses. |
Additional user defined addresses for Parts, Tags, and D-Script. (In the ST and GP77R models this area only goes up to LS4095.) |
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What is the System Data Area? |
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The system data area (LS0 to LS19) stores the GP's basic information such as clock data and the currently displayed screen number.
As the LS area cannot be monitored directly by the PLC's ladder program, this data, by default, is written into the PLC's data register starting with
the "System Start Address". This is done so that the PLC can use this data in the PLC's logic program. This feature can be disabled if desired. |
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For the details of the system data area, refer to the PLC Connection
Manual (PDF):
- When connecting to a PLC or Inverter --> Direct
Access Method ( PDF:248KB)
- When using the Memory Link Method --> Memory
Link Method ( PDF:747KB) |
How to set the System Start Address |
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[Method 1] Settings using GP-PRO/PBIII C-Package |
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(1) |
Click [GP Setup] from the
Project Manager and set the System Start Address in the [Mode
Settings] tab. |
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(2) |
Transfer the project file to the GP.
Be sure to check the "GP System Screen" option before downloading.
To do this go to the Project Manager Screen. Click on the Transfer button. Then Setup -> Transfer Settings
from the menu bar of the "Transfer" dialog box. Check the
"GP System Screen" check box then transfer the file. |
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[Method 2] Settings using the GP's OFFLINE MENU |
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Go OFFLINE and select [Main
Menu] -> [Initialize] -> [Setup Operation
Surroundings] -> [1:1] or [n:1]. Then
open [Setup Operation Surroundings]. |
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| Note |
The addresses that can
be set to the System Start Address vary depending
on each PLC.
For the details, refer to each manufacturer's
[PLC
Connection Manual]. |
(For Example) Mitsubishi
Electric |
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