Siemens SIMATIC FM 353 - Page 308

Troubleshooting
11-6
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
11.2.2 Diagnostic interrupts
Overview
Internal errors, external errors and external channel errors are indicated to an inter-
rupt-capable system by means of diagnostic interrupts (see diagnostic interrupt
data in Tables 11-4, 11-5 and Section 6.3.4). This presupposes that the diagnostic
interrupt message was activated at the time of configuration (see Chapter 5). If the
system is not interrupt-capable, the diagnostic interrupt information must be read
out cyclically with POS_DIAG.
Error class Coding Message
Internal errors Byte-.Bit-No. 0.1
Group error byte 2, 3
LED “SF”
External errors Byte-.Bit-No. 0.2 LED “SF” and “DIAG”
External channel errors Byte-.Bit-No. 0.2, 0.3 LED “SF” and “DIAG”
y
Group error byte 8
A diagnostic interrupt is reported by the FM 353 as “incoming” or “outgoing”.
Diagnostic interrupt
Message to the CPU (precondition: interrupt message activated
(see Section 5.2)
Message in the
“troubleshooting”
dis
p
la
y
of “Para-
Entry in diag-
nostic buffer
No OB 82
exists  CPU
OB 82 OB 1
display of Para
-
meterize FM353”
M
e
n
u
: T
est
>
exists  CPU
switches to
STOP
Enters the
diagnostic in-
formation in the
diagnostic
Enters the
diagnostic in-
formation in
the user DB
Calls
POS_DIAG
Menu: Test >
Troubleshooting
diagnostic
buffer of the
CPU (4 bytes)
and calls SFC
52
the user DB
starting at ad-
dress 70 and
calls
POS_DIAG
Interrupt acknowledgement
If processing is to continue after a diagnostic interrupt, the diagnostic interrupt has
to be acknowledged with a restart (user DB, DBX37.5) when the error has been
remedied.
Internal errors cannot be acknowledged. External errors are self-acknowledging.