In direct operation, the transmission of the output telegrams can be triggered directly via the push-buttons available at the binary input. Depending on the binary input variant, the opening and closing of the contact or a voltage change is simulated without components needing to have been physically connected to the channels or triggered.
Each channel of the binary input can be operated via a separate push-button (“Channel state On/Off” push-button) (Operation in direct operation). When pressing the “Channel state On/Off” push-button, the closing or opening of a contact or the application of a voltage for this channel is simulated. Depending on the configuration, the transition from the previous input states at the terminals to the new state simulated by the “Channel state On/Off” push-button may result in the telegram being sent. With the operation of the “Channel state On/Off” push-button, the current push-button or voltage states at the input terminals are not taken into account. When direct operation is active, the sending of output telegrams cannot be triggered via the connected push-buttons and sensors, but only via the “Channel state On/Off” push-button.
The “Channel state on/off” push-button can be configured as a switch or as a push-button.
Configuration as push-button
When configured as a push-button, the “Channel state On/Off” push-button of the channel behaves as if a push-button were connected to the channel. Both pressing the “Channel state on/off” push-button and releasing the “Channel state on/off” push-button are evaluated separately and result in telegrams being sent depending on the configuration.
Example: This setting can be used, for example, to simulate the ringing function for a connected signal transmitter by pressing and releasing the “Channel state On/Off” push-button. The operation of the “Channel state On/Off” push-button thus corresponds exactly to the function of the push-button connected to the channel.
Configuration as switch
When configured as a switch, the “Channel state On/Off” push-button behaves as if the push-button were a switch that changes its state each time the push-button is pressed. Pressing and releasing the “Channel state On/Off” push-button is evaluated as a common operation and, depending on the configuration, results in telegrams being sent.
Example: A frost protection monitor connected to the duct closes its contact when the temperature is too low. As soon as the temperature has risen, the contact in the frost protection monitor is opened again. The first pressing of the “Channel state On/Off” push-button simulates closing of the contact of the frost protection monitor. After releasing the “Channel state On/Off” push-button, this closure remains. The alarm triggered by the binary input thus remains. Pressing the “Channel state On/Off” push-button a second time causes the (simulated) contact of the frost protection monitor to open again. The alarm triggered by the binary input is cleared.
Application examples
Commissioning and maintenance:
The installer can, for example, check the function of the binary input and the actuated actuators and controllers in an early phase of commissioning or during maintenance work, without components already having been physically connected to the channels or having to be triggered.
Troubleshooting:
The installer can narrow down the error to the connected push-buttons and sensors by operating via the push-buttons present at the binary input. If the telegrams are sent as expected through operation via the “Channel state On/Off” push-button, the fault is with a connected push-button or sensor.
Factory settings
In the delivery state (see also Building site function), the function in direct mode is as if the “switching (On/Off)” function had been configured.