MFR Timing Functions

Each of the eight output channels has an independent logic controller. The module can therefore handle simple control and timing tasks that might otherwise require a PLC or external timing relay. Configure these functions with MFR-Setup.

Each output can be assigned to an input and configured with its own timing function.

Overview of Modes

Direct input/output

German UI label: Ein- / Ausgabe (Direkt)

In pass-through mode, the output directly follows the state of its assigned input.

• Input high $\to$ Output on
• Input low $\to$ Output off

On-delay

German UI label: Einschaltverzögerung

The output switches on only after the input has remained active continuously for the configured time $t_1$.

• Purpose: Filters short pulses at the input.
• Sequence: If the input becomes inactive before $t_1$ expires, the output remains off. After $t_1$ expires, the output switches on and then switches off immediately when the input becomes inactive.

Off-delay

German UI label: Ausschaltverzögerung

The output switches on with the input and remains active for the configured time $t_1$ after the input becomes inactive.

• Purpose: Run-on control, for example for a fan.
• Sequence: Input high $\to$ output immediately on. Input low $\to$ wait for $t_1$ $\to$ output off.

Pulse on activation

German UI label: Wischimpuls (Einschaltend)

Generates a pulse of length $t_1$ when the input changes from low to high (rising edge).

• Behavior: The output switches off after $t_1$, even if the input remains active.
• Trigger: Low-to-high transition only.

Pulse on deactivation

German UI label: Wischimpuls (Ausschaltend)

Generates a pulse of length $t_1$ when the input changes from high to low (falling edge).

• Typical use: Triggering an action when a button is released.
• Important: Maintain the module's power supply for the full duration of $t_1$.

Clock: pulse/pause

German UI label: Taktgeber (Puls / Pause)

The output cycles while the input is active. Configure two times:

• $t_1$: On-time
• $t_2$: Off-time

Clock: pulse/period

German UI label: Taktgeber (Puls / Periode)

This mode defines the total period instead of the off-time.

• $t_1$: On-time
• $t_2$: Total period (on-time + off-time)
• Example: A 100 ms pulse in a 1,000 ms period produces a 10% duty cycle.

Remote Terminal Unit (RTU)

German UI label: Fernwirk-Modus

In this mode, the timing logic is disabled. Signals are mirrored through the Ethernet or RS-232 interface: an input on Module A controls the corresponding output on Module B.

• Connection: Connect the modules through a network, a direct Ethernet crossover cable, or an RS-232 null-modem cable, as appropriate.
• Restart Interlock (Safety Function): The modules exchange a keep-alive signal every five seconds. If the signal is lost, for example because of a cable break, all outputs return to the off state.

Time Ranges

The available ranges provide different timing resolutions. Timing is based on an internal 8 MHz crystal oscillator.

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

The module stores all timing values and modes in EEPROM and retains them when power is removed.