Appendix B: Relay Timing
PulseStop Mode
For generators with PulseStop mode starting types (Type 13):
•Relay 1 (Stop) and Relay 2 (Start) can be used with a common ground for
•If Relay 3 is configured for Preheat, the signal only shows up on Relay 3.
•The Preheat on Relay 3 will not overlap the Crank Time if ShutDown Bypass is not enabled.
•If the ShutDown Bypass is enabled, the Preheat on Relay 3 will remain high for the Crank Time and for the ShutDown Bypass period after cranking.
•To get the ShutDown Bypass on Relay 3 with no preheat, Relay 3 must be configured for Preheat with ShutDown Bypass and have the Preheat time set to zero.
•The AGS will make three attempts to stop the generator. If the generator has still not stopped at the end of the third attempt, the appropriate Fault will be generated.
•Each stop attempt will consist of engaging the stop relay for 5 seconds and then waiting 20 seconds before checking the state of the Gen Run Signal to see if the stop attempt was successful.
•The “Delay” refers to the “Preheat to Crank Delay” and may be zero.
•Cranking will cease when the generator run signal goes high for the specified hold time or when the crank time has elapsed.
Stop
Relay 1: Stop
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| Start | Shutdown |
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Relay 2: Start (Cranking) |
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| Time |
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Relay 3: Preheat (Glow) | Preheat |
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& Shutdown Bypass |
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Figure 41 PulseStop Mode Timing Diagram |
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86 | Xanbus Automatic Generator Start (AGS) Owner’s Guide |