Chapter 5 Relay Ladder Logic Programming
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5B
Timer Instruction
The SG2 includes 31 Timer coils that can be used throughout a program. T0E
and T0F keep their current value after power lost if “M Keep” is active, but the other
Timers’ current value is non-retentive. Each Timer has a choice of 8 operation modes,
1 for a pulse Timer and 7 for general purpose Timer. Additionally, each Timer has 6
parameters for proper configuration. The table below describes each configuration
parameter and lists each compatible element for configuring Timers.
Symbol Description
Compatible
Instructions
Range
①
Timer Mode (0-7)
Input I01-I0C/i01-i0C
Timer Unit 1: 0.01s, range: 0.00 - 99.99 sec
Keypad input
Z01-Z04/z01-z04
2: 0.1s, range: 0.0 - 999.9 sec
Output
Q01-Q08/q01-q08
3: 1s, range: 0 - 9999 sec
Auxiliary coil
M01-M3F/m01-m3F
②
4: 1min, range: 0 - 9999 min
Auxiliary coil
N01-N3F/n01-n3F
ON: the Timer reset to 0
Expansion input
X01-X0C/x01-x0C
③
OFF: the Timer continues timing
Expansion output
Y01-Y0C/y01-y0C
④
Timer current value
RTC R01-R1F/r01-r1F
⑤
Timer preset value
Counter
C01-C1F/c01-c1F
⑥
Timer code(T01~T1F total: 31 Timers)
Timer
T01-T1F/t01-t1F
Analog comparator
G01-G1F/g01-g1F
Normal open contact
Lo
※
The preset value of Timer could be a constant or other function current value.
※
The current value of T0E and T0F will be kept when SG2 on a loss of power if the “M-Keep” is active.
Timer Mode 0 (Internal Coil)
Mode 0 Timer (Internal Coil) used as internal auxiliary coils. No timer preset value. The status of T coil becomes
with enable coil as shown below.
※
I01 is enable coil.
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