Lock Switch Button
The Lock Switch button (WSpt) is used to manually lock a switch. The WSpT button is also used to deactivate the switch chain mechanism.
To lock a switch, press WSpt, together with the button of the switch being locked. For double or single slip switches, the switch being locked depends on the current switch selection (KWT). Unlocking is done in a similar manner using WESpT
Once a switch has been manually locked, the switch's red manual lock lock light becomes lit. Any attempts to throw the switch (either manually, using WGT, or as a result of setting a route) are prevented.
Switch Chain Locking
To disable the switch chain mechanism, use the WSpT button together with the station button. Notice that the LK light becomes lit. Unlocking (enabling) the switch chain is done in a similar manner using the WESpT button.