2-2a. Call indication - Event Handler (practice)

System configuration

Exercise

Call indication

• When calling the Control Room a lamp (RCO 4) at the control room should be activated when the private ringing starts. (The Control Room is in “Private” mode).
• The lamp should be turned off when the private ringing stops.

Call indication, modified

• The customer changes his mind; the lamp should go on when the private ringing starts and stay on also during the conversation. When the conversation ends the lamp should be switched off. If the call is not answered, the relay must drop when the ringing times out. The lamp should not go on when the Control Room makes an outgoing call, only when receiving a call.

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Related articles

• 2-2a. Call indication - Event Handler (solution)