Technical data

SINAUT TD7 software package for the CPU
2.5 Data point typicals
Software
System Manual, 07/2009, C79000-G8976-C222-07
267
A parameter can also be set locally at the partner object that receives the parameter. The
partner object then must be set to ’local’ at the Local input parameter (see FB Par12D_R
below). The current status of the Local input parameter is reported by the partner object and
displayed here at the LocalOperation output. As long as the partner object is set to 'local', no
parameters are accepted there from other locations.
Transmission of the data area defined by ParameterInput can be triggered in four ways:
● With the input parameter EnterInput
You should use this input parameter when the data area defined at ParameterInput is
entered over hardware (digital and analog input modules). EnterInput must then be
connected to a button on a console or panel over a digital input. The transmission of the
entered values is then triggered by pressing this button. The entire data area specified by
ParameterInput is always transmitted.
● With the input parameter ContinuousEnterFunct = TRUE
You can use this parameter setting when the parameter is entered by software, for
example at an operator panel (OP). There is a constant check for changes. When a
change is detected in the data area defined with ParameterInput, the data double words
that have changed since the last transmission are transmitted (see note).
● With the input parameter Release
You can use this input parameter when the parameter is entered by software, for
example on an OP. The Release input should then be operated by a function key on the
OP. Changes are checked when a 1 signal is detected at the Release input. The data
double words from the data area defined with ParameterInput that have changed since
the last transmission (see note) are transmitted.
● With the input parameter RetransmitAll
You can use this input parameter when the parameter is entered by software, for
example on an OP. The RetransmitAll input should then be operated by a function key on
the OP. When a 1 signal is detected at the RetransmitAll input, the entire data area
defined by ParameterInput is transmitted. Changes are not checked.
Note
When the changed data area only is transmitted, this area consists of the first and the last
double word in which a change was detected and all words located in between, even if
these have not changed.
Example:
The area to be read is 10 double words long. In this case, changes were detected in the
2nd, 5th and 8th double words. The transmitted area is therefore from the 2nd to the 8th
double word inclusive.
Note
When only changed data is transmitted and the data area contains values in double word
format, the user is responsible for ensuring that these double word values are actually
located in one of the maximum 12 double words of the data area to be acquired.
Distribution over two consecutive data double words could otherwise lead to the
transmission of only one word of the double word value (high or low word) because a
change has occurred in only that particular word. The missing word could lead to
processing problems on the partner that receives this value.