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Chapter 7 Integrated OBs, SFBs and SFCs
Length word
Byte 2 and Byte 3
Status and
error reports
7-32
The connection is not (yet) established. The message disappears as
soon as the connection is stable. If all connections are interrupted,
please check the block itself and the bus cable. Another possibility for
the occurrence of this error is a wrong parameterization, like e.g.
inconsistent addressing.
B Handshake error
This could be a system error or the size of the data blocks has been
defined out of range.
C Initial error
The wrong handling block tried to initialize the order or the size of the
given data block was too large.
D Cancel after RESET
This is a normal system message. With PRIO 1 and 2 the connection is
interrupted but will be established again, as soon as the communication
partner is online. PRIO 3 connections are deleted, but can be initialized
again.
E Order with basic load function
This is a normal system message. This order is a READ/WRITE-
PASSIV and can not be started from the AG.
F Order not found
The called order is not parameterized on the CP. This error may occur
when the SSNR/A-No. combination in the handling block is wrong or no
connection block is entered.
The bits 4 to 7 of Byte 2 are reserved for extensions.
In the length word the handling blocks (SEND, RECEIVE) store the already
transferred data of the current order, i.e. the received data amount for
receiving orders, the sent data amount for sending orders.
Describe:
Per SEND, RECEIVE during the data transfer. The length
word is calculated from: current transfer amount +
amount of already transferred data
Delete:
Per overwrite res. with every new SEND, RECEIVE,
FETCH.
If the bit "order ready without error" res. "Data fetch/data
transition ready " is set, the "Length word" contains the
current source res. destination length.
If the bit "order ready with error" is set, the length word
contains the data amount transferred before the failure
occurred.
Important status and error reports of the CPU
ADAM 8000 Manual CPU 821x – Rev 1.1
CPU ADAM 821x
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