local notification_id = "NOID"
local ind = POS(-2209,8,-651) -- IMPORTANT NB: remember to update this if you move the indicator mesecon switch
local print_notification = true
local function send_train()
	set_rc("FREIGHT BYARD_NOID_SHUTTLE BYARD BY_COLLECT_NOID BY_RTS NIDTH NOIDEA IND TREES") -- RC string to overwrite when departing for the autoyard, remember to include the return RCs as well
	step_fc() --step the fc forward to be ready for the autoyard
	atc_send("A1SM")
	F.indicator(ind,false)
end
if event.ext_int then -- trigger event from the yard itself. 
	if event.message == "notify" then -- can also be a manual/other message, just edit this if statement
		if print_notification then print(rwt.to_string(rwt.now()).. " "..notification_id.." RX Notification") end
		if F.indicator(ind) then return end -- indicator is already lit, train hasn't collected the first set yet
		if atc_id then --send the train to the yard for collection
			send_train()
			return
		else -- set the indicator to await the returning train
			F.indicator(ind,true)
			return
		end
	end
end
if event.train and atc_arrow then
	if F.indicator(ind) then
		send_train()
		return
	end
	atc_send("B0")
	return
end