8-20
VersaPoint™ I/O System Profibus-DP NIU User’s Manual – August 2005
GFK-1911B
8
Abort/Error Fragment:
Byte 1
Service
Byte 2
Error code, if required
...
Byte n
Error code, if required
Byte 1 - Service in abort/error fragment
7
6 5 4 3 2 1 0
Request/
response
1 1
Reserved
Bit 7
Request/response
0 = Request
1 = Response
Bits 6 to 5
Fragment type
11 = Abort/error fragment
Bits 4 to 0
Reserved
Communication can be reset using 60
hex
so that all buffers involved in the
communication are set to their initial status.
When a service is complete, this should be acknowledged (clear) using service 00
(the other bytes of the Virtual C1 module are then "don’t cares"). A handshake is
implemented, which indicates to the Profibus DP/V1 NIU that the result has been
received by the master. The Virtual C1 module can then receive the next service.
Summary of Contents for VersaPoint IC220PB001
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