Bistable relay is a relay with two stable States. When the contact input is on, the relay coil turns on when input on input off, coil disconnected. In the absence of signal on both inputs or a signal present at both inputs, the coil status has not changed.
Bistable relay in the diagram is created by dragging from the library elements. While the coil is created without reference.
Bistable relay, when binding to a digital input-output controller controls the state of this output. When using an intermediate relay operates its contacts.
Bind and rebind relay comparison is made in the following ways:
1. Drag the coil-free digital input / output.
2. Editor block:
The binding is made by double-clicking on the desired input-output controller. The first line of the menu always proposes the creation of an intermediate relay with a first free index. When binding to the input / output controller, contacts of the coil cannot be used. When creating an intermediate relay, the number of contacts the relay is unlimited and they can be used anywhere in the schema after it is created.