MFR Timing Functions

Each of the 8 output channels has its own logic controller. This allows the modules to perform tasks that would otherwise require a PLC or external time relays. Configuration is done via the MFR-Setup Software.

The basic principle: Each output can be individually assigned to an input event and provided with a time function.

Overview of Modes

Input / Output (Direct)

German: Ein- / Ausgabe (Direkt)

The "Passthrough Mode". The output directly follows the state of the assigned input.

• Input 1 (High) $\to$ Output 1 (On)
• Input 0 (Low) $\to$ Output 1 (Off)

Switching-on delay

German: Einschaltverzögerung

The output only switches on if the input signal is present stably for a defined time ($t_1$).

• Function: Filters short interference pulses at the input.
• Sequence: If the signal is present for shorter than $t_1$, nothing happens. Only after the time expires does the output switch. If the input drops, the output switches off immediately.

Switching-off delay

German: Ausschaltverzögerung

The output switches on immediately with the input but remains active for a defined time ($t_1$) after the input signal drops.

• Function: Follow-up control (e.g., fan run-on).
• Sequence: Input High $\to$ Output immediately High. Input Low $\to$ Time $t_1$ elapses $\to$ Output Low.

Switching on wipe pulse

German: Wischimpuls (Einschaltend)

Generates a pulse of defined length ($t_1$) as soon as the input is activated (rising edge).

• Behavior: The duration of the input signal does not matter. Even if the button is pressed permanently, the output turns off after time $t_1$.
• Trigger: Only on 0 $\to$ 1 transition.

Switching off wipe pulse

German: Wischimpuls (Ausschaltend)

Generates a pulse of defined length ($t_1$) as soon as the input is deactivated (falling edge).

• Behavior: Ideal for triggering actions when releasing a button.
• Important: For the pulse to be fully generated, the module's power supply must be maintained during time $t_1$.

Clock Pulse / Pause

German: Taktgeber (Puls / Pause)

The output blinks / clocks as long as the input is active. Two times can be configured:

• $t_1$: Duration of the pulse (On)
• $t_2$: Duration of the pause (Off)

Clock Pulse / Cycle

German: Taktgeber (Puls / Periode)

Similar to Pulse / Pause, but here the total period duration is defined.

• $t_1$: Duration of the pulse (On)
• $t_2$: Total duration of the period (On + Off)
• Example: 100ms pulse at 1000ms period corresponds to 10% Duty Cycle.

Remote Terminal Unit (RTU)

German: Fernwirk-Modus

In this mode, the timing logic is deactivated. Instead, signals are "mirrored" via the data interface (Ethernet/RS232). An input on Module A switches the output on Module B.

• Prerequisite: Two modules must be connected via Crossover cable (RS232/Ethernet) or network.
• Restart Interlock (Safety Function): The modules send each other a "keep-alive" signal every 5 seconds. If this is missing (e.g., cable break), all outputs automatically fall back to the safe state (Off).

Time Ranges

The times ($t_1,t_2$) can be configured in different resolutions depending on the requirement. The basis is an internal 8 MHz quartz.

Range	Setting Range	Resolution (Steps)
Milliseconds	$100\dots 2000$ ms	$100$ ms
Seconds	$1\dots 120$ s	$1$ s
Minutes	$1\dots 120$ min	$1$ min
Hours	$1\dots 100$ h	$1$ h

Note on Configuration

All times and modes are permanently stored in the EEPROM of the module and are retained even after a power failure.