6F3B0250
Basic Hardware and Function 111
6. Programming Information

System information

System information is the area which stores execution control parameters. The following
contents are included in t he system informat ion.
(1) Machine parameters (hardware type, m em or y type)
(2) User progr am informat ion ( pr ogram ID, system com m ents, number of steps used)
(3) Passwords
(4) Retentive regist er ar ea informat ion
(5) T1S program memor y mode, 4 k steps or 8 k st eps (T1S only)
(6) Execution control paramet er s ( scan mode, timer int er r upt interval)
(7) Station number setting f or program m er por t (T1), or RS-485 port comm unication
parameter s ( T1S)
(8) I/O allocation table
(9) Input force table
The system information is stored in the built-in EEPROM. Ther efore, when these
information is modified, the EEPROM w rite operation is necessary. Otherwise, these are
over-written by orig inal EEPRO M contents at the next initial load tim ing.

User program

The T1 has a capacity of 2 k steps of the user program. And the T1S has a capacity of 8
k steps of the user pr ogram.
The user pr ogram is stored by each program types as shown in the following diagr am,
and is managed by units called blocks in each program types.
User prog r am config ur ation Progr am type internal configuration
(Progr am types) (Blocks)
Subroutine
I/O interrupt #4
I/O interrupt #3
I/O interrupt #2
I/O interrupt #1
Timer in terrupt
Sub-program #1
Block 1
Block N
(N = max. 256)
Block 10
Block 2
Block 1
Main program
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