Omron Programmable Terminals NT631, Инструкции по эксплуатации

Страница: 279 / 692

271
Areas for Control/Notification
Section 7-2
[“Content update memory table” and “PT status” of the PT status notify area]
m + 1
Content update
memory table
m
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word
Bit
0 0 0 0 0 0 – – – – – PT status
Screen number (4-digit BCD or hexadecimal value)
Numeral setting strobe flag
– – – –
BCD Hexadecimal Numbers
0001 to 1999
H
0000 to 07CF
H
Memory table numbers 0 to 1999
Reference The memory table number is notified only when the memory table contents are
changed by operation at the NT631/NT631C.
S
PT status notify bits
The PT status notify bits have the functions shown below.
1 (ON)
Run
Low
Printing
Off
Open
Open
Open
0 (OFF)
Stop
Normal
Stopped
Lit/Flashing
Close
Close
Close
Notified Information
PT operation status
Battery status
Screen switch strobe
Numeral setting strobe flag
Character string setting strobe flag
Printer operating status
Backlight status
grobal window status
Local window1 status
Local window2 status
15
13
12
11
10
7
6
5
4
3
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit
0
0
0 0 0 0
- PT operation status (bit 15)
When the NT631/NT631C is in the RUN mode, this bit is set to “1”. In other
modes, and when the System Menu screen is displayed, it is set to “0” (OFF).
When this bit is set to “0” (OFF), the allocated bits and words are neither read
or written.
During the RUN mode, “1” (ON) is periodically written to this bit. In order to
check whether the NT631/NT631C is operating normally or not, write “0”
(OFF) to this bit, then read it 30 seconds later. If the setting for the bit is “1”
(ON), the NT631/NT631C is judged to be running, and if it is “0” (OFF), the
NT631/NT631C is judged to be stopped.
Notice To ensure system safety, be sure to periodically read the PT operating status bit
from the host in order to ensure that the PT is always operating normally.