86 Xanbus Automatic Generator Start (AGS) Owner’s Guide
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 three-wire configured generators.
• 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.
• 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.
• 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.
Figure 41
PulseStop Mode Timing Diagram
Relay 1: Stop
Relay 2: Start (Cranking)
Relay 3: Preheat (Glow)
& Shutdown Bypass
Start
Stop
Preheat
Delay
Crank
Time
Shutdown
Bypass
