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| Automatic gate control requirements: |
| Requirement: |
| 1. Opening and closing of the gate is controlled
by the guard in the control room |
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| 2. Normally the gate shall be opened or closed
completely, but the opening and closing action can be |
| interrupted at any time. |
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| 3. The alarm lamp shall begin to flash when
the gate acts and shall keep flashing as long as the gate |
| continues to move. |
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| 4. A pressure damper shall be provided so
that the gate can be automatically opened when it touches a |
| person or an article. |
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| The Function Block Program
Diagram is as follows: |
