1
Select Block Type
Timer or Counter
⏱️ TimerTON / TOF / TP
🔢 CounterCTU / CTD
2
Timer Parameters
Set time base and preset
PLC Block Analysis Result
Timer: TON
LIVE
Time Delay
0.000
s
Preset Time
0.000
s
Output Status (Q)
—
—
TON (Timer On-Delay): Output Q = TRUE when ACC ≥ PV and IN = TRUE.
TOF (Timer Off-Delay): Output Q = FALSE when ACC ≥ PV after IN falls.
Time Calculation: Actual Time (s) = Preset Value × Time Base / 1000
TOF (Timer Off-Delay): Output Q = FALSE when ACC ≥ PV after IN falls.
Time Calculation: Actual Time (s) = Preset Value × Time Base / 1000
PLC Timer & Counter Calculator
When programming PLCs, calculating exact time delays and count values is essential. This tool helps you quickly determine elapsed times, remaining times, and counter states for common IEC 61131-3 timer and counter function blocks.
Timers: TON (On-Delay), TOF (Off-Delay), TP (Pulse Timer)
Counters: CTU (Count Up), CTD (Count Down), CTUD (Up/Down)
— Vaibhav Dhokpande, Developer · TaskJunction