Countdown Timer - Panasonic GTWIN Reference Manual

GTWIN Reference Manual

1.6.7.1 Countdown timer

The countdown timer counts down from the start value in seconds until the elapsed value is 0.
There are sixteen countdown timers (number 0 to F) available. Every countdown timer needs
two devices: one for controlling the start and completion of the countdown (control device),
one for storing the start and the elapsed value (counter device).
Control device
Counter Device
Control device
The control device uses two words beginning from the starting address specified. The first
word stores the start bit, the second the completion bit. The countdown begins when the start
bit is turned ON. When the elapsed value becomes 0, the start bit is turned OFF and the
completion bit is turned ON.
Address
F E
N
N+1
Counter device
Sets the starting address for the start value (0–65535) and the elapsed value. The start value and the elapsed value
are stored in the sixteen words after the starting address.
Address Timer number
N+0
N+1
N+2
N+3
N+4
N+5
N+6
N+7
N+8
N+9
N+10
N+11
N+12
N+13
N+14
N+15
Controls the start and completion of the countdown.
Stores the start and the elapsed value.
Timer number
D C B A 9
Completion bit
Contents
0
1
2
3
4
5
6
7
Start value and elapsed value
8
9
A
B
C
D
E
F
8 7 6 5
Start bit
1.6 GT Configuration
4 3 2 1
37