Alspa CE80–20 FIP Bus Interface Unit User's Manual
Alspa CE80–20 FIP Bus Interface Unit User's Manual
Alspa CE80–20 FIP Bus Interface Unit User's Manual
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Operation2. OPERATING MODES OF THE BUS INTERFACE UNITIdleThe <strong>Bus</strong> <strong>Interface</strong> <strong>Unit</strong> can operate in the following modes:Idle ModeReadyReady ModeRun ModeRunHow Communications Affect Operating ModeThe operating mode of the <strong>Bus</strong> <strong>Interface</strong> <strong>Unit</strong> depends on whether or not it is communicating with the <strong>FIP</strong> network.A. If it is communicating with the <strong>FIP</strong> network, the <strong>Bus</strong> <strong>Interface</strong> <strong>Unit</strong> may be commanded by the networkcontroller to operate in Idle, Ready or Run mode.B. If a <strong>FIP</strong> network is not present, the <strong>Bus</strong> <strong>Interface</strong> <strong>Unit</strong> remains in Idle mode at powerup.C. If a <strong>FIP</strong> network is present but communications between the <strong>Bus</strong> <strong>Interface</strong> <strong>Unit</strong> and the network controller havebeen lost, the <strong>Bus</strong> <strong>Interface</strong> <strong>Unit</strong> returns from Run mode back to Ready mode.Page 3–2<strong>Alspa</strong> <strong>CE80–20</strong> <strong>FIP</strong> <strong>Bus</strong> <strong>Interface</strong> <strong>Unit</strong> User’s <strong>Manual</strong>ALS 52311 b–en
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