semaphore TBOX LT2-530 Series, Руководство пользователя, Страница: 68 / 197

Version : 1.09 68
8.5. System variables
The system variables have pre-defined functions.
They are very useful to check or to act on features of
TB
OX
LT2
.
They are divided into ‘Digital’ and ‘Analog’.
8.5.1. Digital System Variables
According to its function a register is Read/Write or Read only. In the following table, the column R/W
indicates:
- :
Read only.
0 :
Write ‘0’ only.
1 :
Write ‘1’ only.
* :
Write ‘0’ or ‘1’.
When the action (SET) is specified, it means that
TB
OX
LT2
maintains the variable at 1 to be sure it is
detected. Such a variable needs to be reset using Ladder/BASIC logic.
Index
Name R/W Description
0
TikSec 0
Tik Second: Changes of state every second. Useful for counting time.
1
PrgRun -
Program run: At each starting of
TB
OX
LT2
, this register changes to 1 and stays at
1 as long as the BASIC/Ladder program runs.
This register is used in BASIC/Ladder to execute operations only at the start of
the program, with the help of a positive edge trigger function.
2
NewPro -
New program: Start of a program flag. Changes to 1 if
TB
OX
LT2
has started after
having received a new program. Changes to 0 after a reset of the
TB
OX
LT2
3
Reboot
1
Reboot: complete restart of
TB
OX
LT2
. It is equivalent to hardware reset.
4
RstWat 1
Reset Watchdog: the watchdog checks the cycle time of BASIC/Ladder program. In
case it is longer than 1 second, it resets
TB
OX
LT2
. This Watchdog can be reset to
reinitialize the 1 second timer in case of cycle time longer.
5
Ala_On 0
Alarm on: this register indicates that alarm is active (not acknowledged). Writing 0
in this register causes a global acknowledgment of all alarms.
It corresponds to a reset of the alarm stack.
6
Alaerr
0
Alarm in error:
TB
OX
LT2
SET this register 1 when an alarm failed to be sent. This
means that after the number of tries, the alarm has been auto-acknowledged.
Must be Reset by User.
7
RstAla
-
Reset Alarm: Not used. See ‘Ala_On’ here above.
8
EnaDCr
*
Digital Chronology: General enable of recording in digital chronology.
9
EnaACr *
Analog Chronology: General enable of recording in analog chronology.
10
EnaSam *
Sampling Tables: General enable of recording in sampling tables (not available).
11
EnaAla *
Enable Alarm: General enable of generating alarms.
12
DisCrd *
Flag digital chronology: can be associated to any digital chronology configuration
to inhibit recording. When at value ‘1’, inhibits recording in Database.
13
DisCra *
Flag analog chronology: can be associated to any analog chronology configuration
to inhibit recording. When at value ‘1’, inhibits recording in Database.
14
DisSam -
Not used
15
DisAla
-
Alarm: flag that can be associated to any Alarm condition. When at value ‘1’,
inhibits the sending of alarm.
16
DaySav -
Time: 1 = summer time (the ASV “ZoneBia” increments or decrements with.
0 = wintertime. the number of seconds according to the time zone)