Siemens 6ES7155-6AA01-0BN0 - Page 37

Interrupts, diagnostics, error, and system messages
5.3 Alarms
IM 155-6 PN ST interface module (6ES7155-6AU01-0BN0)
Equipment Manual, 10/2020, A5E03576904-AE
35
USI structure = W#16#0003
Table 5- 10 USI structure = W#16#0003
Data block name
Content
Comment
Bytes
USI
W#16#0003
Manufacturer-specific diagnostics with failure of supply
voltage L+ as of slot x
2
Followed by the slot as of which the supply voltage L+ has failed.
Slot
W#16#0001 to
W#16#0020
Bit 8 to 15
1
Bit 0 to 7
1
Followed by 2 reserved bytes:
Reserved
1
Reserved
1
USI structure = W#16#0004
Table 5- 11 USI structure = W#16#0004
Data block name
Content
Comment
Bytes
USI
W#16#0004
Manufacturer-specific diagnostics with missing server
module
Result: Station stop
• The I/O modules fail → substitute value behavior
• The interface module continues to exchange data with
the IO controller.
2
Followed by 4 reserved bytes:
Reserved
1
Reserved
1
Reserved
1
Reserved
1
USI structure = W#16#0005
Table 5- 12 USI structure = W#16#0005
Data block name
Content
Comment
Bytes
USI
W#16#0005
Manufacturer-specific diagnostics if more than one I/O
module has been pulled. The number of pulled I/O modules
is displayed.
Result: Station stop
• The I/O modules fail → substitute value behavior
• The interface module continues to exchange data with
the IO controller.
2
The number of pulled I/O modules follows
Quantity
W#16#0002 to
W#16#0020
Bit 8 to 15
1
Bit 0 to 7
1