公司的一台机床这几天多次出现65515报警，早上上班情况最严重，下午突然正常了。通过查找这段

N1111 IF $A_IN[8]==1  ;WITH ROBOT
N1150   TEST_MERKER_INI(($A_DBB[$A_DBB[903]+910]),203,$A_DBB[203],203,65515)
N1111 ENDIF
nc程序发现和DBB903、910、203几个信号有关，用winplc软件监控信号没有发现异常。

TEST_MERKER_INI中的程序内容

VERGLEICHEN
;CHECK SENSOR SIGNAL WITH PARTSTATE IN PROGRAM

N10000 PROC TEST_MERKER_INI(INT BT_STATUS,INT DBB_BT, INT INI_STATUS, INT DBB_INI, INT ALNO)

N10010 NEU:

N10020 INI_STATUS=$A_DBB[DBB_INI]

N10030 IF ((BT_STATUS<>0) AND (INI_STATUS==0)) OR ((BT_STATUS==0) AND (INI_STATUS<>0))

N10040   MELDETEXT=("")   ;Meldetext l鰏chen

  ;Meldetext aufschluesseln,
  ;Meldetext Laenge max 35 Zeichen

N10050   IF DBB_INI==401
N10060    MELDETEXT="INPUT POSITION PRESSING TABLE"
N10070    GOTOF MELDUNG
N10080   ENDIF

N10090   IF DBB_INI==402
N10100    MELDETEXT="PRESSING POSITION "
N10110    GOTOF MELDUNG
N10120   ENDIF

N10130   IF DBB_INI==405
N10140    MELDETEXT="ROBOT UNLOAD POSITION PRESSING TABLE"
N10150    GOTOF MELDUNG
N10160   ENDIF

N10130   IF DBB_INI==682
N10140    MELDETEXT="Turning table UMH: Changing Position"
N10150    GOTOF MELDUNG
N10160   ENDIF

N10130   IF DBB_INI==681
N10140    MELDETEXT="Turning table UMH: Heating Position"
N10150    GOTOF MELDUNG
N10160   ENDIF

N10170   IF DBB_INI==203
N10180    MELDETEXT="Turning Table Welding: Changing position"
N10190    GOTOF MELDUNG
N10200   ENDIF

;N10290   IF DBB_INI==XXX
;N10300    MELDETEXT=""
;N10310    GOTOF MELDUNG
;N10320   ENDIF

;Weitere Meldetexte hier einf黦en

N10610   MELDUNG:
N10620   SETAL(ALNO)

N10630    MSG(""<<MELDETEXT<<" (DBB["<<DBB_BT<<"] / DBB["<<DBB_INI<<"])  NOT PLAUSIBLE")
N10640    M00
N10650    MSG("")
N10660    GOTOB NEU
N10670 ENDIF

N10680 RET
N10690 M17

有人能帮我解释是哪里触发的报警吗？