T (Timer) - FATEK FBS Series Manual

Basic Function Instruction
T
Symbol
TB: Time Base (0.01S, 0.1S, 1S)
Range
Ope-
rand
WX240
Tn
PV
The total number of timers is 256 (T0～T255) with three different time bases, 0.01S, 0.1S and 1S.The
●
default number and allocation of timers is shown as below (Can be adjusted according to user's actual
requirements by the "Configuration" function):
T0～T49：0.01S timer（default as 0.00～327.67S）。
T50～T199：0.1S timer（default as 0.0～3276.7S）。
T200～T255：1S timer（default as 0～32767S）。
FBs-PLC programming tool will lookup the timer's time base automatically according to the "Memory
●
Configuration" after the timer number is keyed in. Timer's time = Time base x Preset value. In the example
1 below, the time base T0 = 0.01S and the PV value = 1000, therefore the T0 timer's time = 0.01S x 1000 =
10.00S.
If PV is a register, then Timer's time = Time base x register content. Therefore, you only need to change
●
the register content to change the timer's time. Please refer to Example 2.
The maximum error of a timer is a time base plus a scan time. In order to reduce the timing error in the
※
application, please use the timer with a smaller time base.
Description
When the time control "EN" is 1, the timer will start timing (the current value will accumulate from 0) until
●
"Time Up" (i.e. CV≧PV), then the Tn contact and TUP (FO0) will change to 1. As long as the timer control
"EN" input is kept as 1, even the CV of Tn has reached or exceeded the PV, the CV of the timer will
continue accumulating (with M1957 = 0) until it reaches the maximum limit (32767). The Tn contact status
and flag will remain as 1 when CV≧PV, unless the "EN" input is 0. When "EN" input is 0, the CV of Tn will
be reset to 0 immediately and the Tn contact and "Time Up" flag TUP will also change to 0 (please refer to
the diagram
If the FB -PLC OS version is higher than V3.0 (inclusive), the M1957 can be set to 1 so the CV will not
●
S
accumulate further after "Time Up" and stops at the PV value. The default value of the M1957 is 0,
therefore the status of M1957 can be set before executing any timer instruction in the program to
individually set the timer CV to continue accumulating or stop at the PV after "Time Up" (please refer to the
diagram below).
WX WY WM WS
WX0 WY0 WM0 WS0
∣ ∣ ∣ ∣
WY240 WM1896 WS984
○ ○ ○ ○
below).
TIMER
Tn: Timer Number.
PV: Preset value of the timer.
TMR CTR HR IR
T0 C0 R0 R3840
∣ ∣ ∣ ∣
T255 C255 R3839 R3903
○
○ ○ ○ ○
6 -2
Operand
OR SR ROR DR
R3904 R3968 R5000 D0
∣ ∣ ∣ ∣
R3967 R4167 R8071 D4095
○ ○ ○ ○
T
K
0
∣
32767
○