VIPA CP143 TCP/IP, Manual

Page: 74 / 210

CP143 TCP/IP firmware CP143
H1 / TCP/IP manual
4-26 Rev. 00/07
9 Remote error
An error occurred at the remote station during a READ/WRITE task.
A Connection error
The connection for a task has not been established. This error will disappear as soon as a
connection can be established. When all connections of a CP are in the interrupted state the
module or the LAN cable may have been damaged. This error may also occur due to a
configuration error, e.g. incorrect addressing.
B Handshake error
This error may be a system error or the size of the data block is too large.
C Initiation error
A task was initiated by means of the wrong handler module or the transferred data block
was too large.
D Termination after RESET
This is an operational indicator. The connection is terminated for priority 1 and 2 and it
will only be re-established once the remote station is ready for a new connection. Priority 3
connections are terminated. These may be initiated again.
E Task with boot-function
This is an operational indicator. This is a READ/WRITE-PASSIV task and can therefore
not be started by the PLC.
F Task does not exist
The task that was addressed has not been configured on the CP143 H1 / TCP/IP. This error
may occur if the SSNR/A-NR combination has been entered incorrectly into the handler
module or when a connection module has not been entered.
Bits 4 to 7 of byte 2 are reserved and intended for future expansion.
• • • •
Length-word byte 3 and byte 4
The length word is used by the handler modules (SEND, RECEIVE) to deposit the amount of
data for the respective task that has already been transferred. This means the amount of data
already received for receive tasks and the amount of data transmitted for send tasks.
Write: this word is changed by SEND and RECEIVE while the data transfer is active.
The "length-word" is calculated from:
current amount trans quantity of data already transferred
Reset: overwrite or by each new SEND, RECEIVE, FETCH task.
The “length-word” contains the current source or destination quantity when the bit
"Task completed without error" or "Data transmission/reception completed" is set.
When the bit “Task completed with errors” is set, then the length word contains
the amount of data that was transferred before an error occurred.