Error Detection Nck Cpu - Siemens Sinumerik 840C Diagnostics Manual

3 Error Display on CPU
Figure
4
5
6
7
8
9
Error detection
The cause of errors in the NCK area are displayed on the 386 NCK CPU as far as
NCK CPU
possible by the flashing rhythm of the red LED at the front of the NCK CPU. On
the 486 CPU, these error detections are now displayed on the 7-segment display
at the front of the CPU module (2 digits, both numbers alternating). If the NC con-
tinues to run and simply intends to indicate failure of the link to the MMC, this is
still signalled by the red LED flashing 11 times. In the case of errors designated by
R! it is essential to read out from the alarm log of the MMC which register con-
tents of the NCK CPU were logged at the time of failure (this makes it much ea-
sier to identify the cause of error).
Error code
1
2
4 !R
7 !R
8 !R
9 !R
10 !R
11
14 !R
15 !R
16
17
18
19
20
21
3–2
ADS interface power-up, MMC waits for '1' from NC
ADS interface power-up state
ADS interface power-up state
Interface active (OKAY)
MMC powered without NC
State which causes removal of the driver
The selected boot bank (switch position on the 486 CPU) is either not
programmed or incorrectly programmed. Switch position 0 must always
function otherwise the module is defective.
DRAM error on NCK CPU, defective during memory test after Power
On
Parity error in the DRAM
Undefined NMI
NMI caused by push button on CSB or CPU (486) or V24 (486)
NMI caused by timeout (CPU local)
NMI caused by timeout on link or local bus
Failure of link to the MMC (this is indicated simply by flashing, also on
486 CPU)
NC processor exception (commonly known as software crash)
Internal hardware fault
Boot transfer error (ADS transport)
Boot transfer error (I code protocol)
Faulty file booted (OMF format)
Faulty file booted (illegal address area)
Wrong file started as last in the loading list (no starting information)
Link area between boot EPROM and loaded system was illegally
overwritten (presumably software error in the loaded system program).
Remedy: Reboot
END OF SECTION
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Meaning
Cause
SINUMERIK 840C / SIMODRIVE 611–D (DA)
04/96