NAiS GT10 - GT30 Basic Communication Area Map

GT10/GT30
Setup
44
3.4 Setting the Basic Communication Area Between the GT30 and PLC
3.4.2 GT30 Basic Communication Area Map
In order for communication to be carried out between the GT30 and PLC, an internal
devicearealikethat shownbelowis providedinthe PLC. Thisshould be usedto control
the GT main unit through the PLC ladder program actually being run.
The starting address “N” of the field shown below is specified in the GT30 configuration
settings of GTWIN screen creation tool, and is then sent to the GT main unit.
Word devices
Word position F E D C B A 9 8 7 6 5 4 3 2 1 0
N+0
Screen no. specified by PLC (area read by GT30 from PLC)
N+1
Usage prohibited
N+2
No. of currently displayed screen (area in which data is written from GT30 to PLC)
Explanation of system area
Screen no. specified by PLC - - - The screen number displayed on the GT30 is
specified from the PLC in hexadecimal format.
No. of currently displayed screen - - - The number of the screen currently
displayed on the GT30 is written to the PLC in hexadecimal format.
Bit devices
Word
position
F E D C B A 9 8 7 6 5 4 3 2 1 0
N+0
BZ
Forced-
display flag
Backlight
Valid flag
Backlight
Flashing
Backlight
Color
N+1
Usage prohibited
N+2
BAT
LOW
flag
BAT
Data Input In
Progress flag
Explanation of system areas
BZ
- - - This turns on the buzzer.
Forced-Display flag - - - At the rise when the bit is turned on, the screen specified by
the PLC is forcibly displayed. (This is executed only when at the rise of the bit.)
Backlight Valid flag
- - - When the bit is turned on, the backlight flashing/backlight
color control becomes effective.
Backlight Flashing
- - - 0: Lighted (normal), 1: Flashing
Backlight Color
- - - 00: Off, 01: Lighted, 10: Lighted, 11: Lighted
BAT - - - This goes on if clock data and Hold PLC Device data held in the SRAM are
not being backed up normally. (This bit also goes on if the SRAM is not backed up by
the battery.)
Data Input In Progress flag
- - - This is 1 while data is being input, and 0 when data
input has been completed.
BAT LOW flag - - - This bit goes on if the battery capacity drops too low. The battery
should be replaced within one week after this bit goes on.