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08.99
How is a task
The master transfers a task to a slave and repeats this task for at least
executed?
as long as the associated response is received from the slave.
The slave provides the response until the master has formulated a new
task.
For responses, which include parameter values, the slave always cycli-
cally responds with an updated value. This involves all responses to the
tasks "request parameter value" and "request parameter value (array)".
Fault evaluation
If tasks cannot be executed, the slave responds as follows:
S
S
Table 5-31
0
1
2
3
4
5
6 to 19
20 to 100
Data types
The data type, assigned to the parameter must be written into the para-
meter value via the PKW mechanism (refer under data type in the pa-
rameter list in Chapter A.1).
Table 5-32
Integer16
Integer32
Unsigned16
Unsigned32
Floating point
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SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
Outputs a response ID = 7
Outputs an error number in word 4 of the parameter area
Error IDs for "DP slave 611U"
Fault
ID
Illegal parameter number (the parameter does not exist)
Parameter value cannot be changed
(Parameter can only be read or is write protected)
Upper or lower value limit exceeded
Incorrect sub–index
No array (parameter does not have any sub–parameter)
Incorrect data type (is not required for the type conversion)
not required
Reserved
Data types
Data type for
"DP slave 611U"
Integer number, 16 bit
Integer number, 32 bit
Integer number without sign
(unsigned) 16 bit
Integer number without sign
(unsigned) 32 bit
Floating–point number
5 Communications via PROFIBUS DP
5.6
Net data (PKW and PZD area)
Error cause
Explanation
INT
DINT
WORD
DWORD
REAL
Data type for
SIMATIC S7
5-275
5
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