
11 Alarms 09.91
11.7 RS232C (V.24) Alarms
Effect:
Explanation:
Remedy:
19
I/O device not ready RS232C (V.24)
• No files are read in
• Low-level DSR signal from external device
• Activate external device
• Do not use DSR
Effect:
Explanation:
Remedy:
20
PLC-alarm-mem. not formated
• No PLC alarm texts read in
The memory for PLC alarm texts was not set up properly
(formatted).
Sequence:
a. Set NC MD 5012 bit 7
b. Key + NC ON
c. ”NC DATA” softkey
d. ”FORMAT AL-TEXT” softkey
e. RECALL key
f. Read in data once more in installation overall reset mode
Explanation:
Remedy:
22
Time monitoring RS232C (V.24)
• The NC cannot output any characters for 60 seconds
– External device blocks CTS (clear to send) signal
for more than 60 s
– When control signals (DC1- DC4) are used, the external device
does not transmit DC1 within 60 s
• The NC has not received any characters for 60 seconds
• Check external device and switch on
• Check and insert cable
• Set SD 5017/5025 bit 0
11–12 © Siemens AG 1990 All Rights Reserved 6ZB5 410-0DL02
SINUMERIK 810 GA3/820 GA3 (IA)
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