Technical data

SINAUT TD7 software package for the CPU
2.5 Data point typicals
Software
284 System Manual, 07/2009, C79000-G8976-C222-07
You can also specify whether the transmission includes all data or only the data double
words that have changed.
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 problems in processing on the partner
that receives this value (applies, for example to ST7cc, but not to an S7 CPU).
Explanation of the parameters
Names: PartnerNo
PartnerObjectNo
Enabled
ImageMemory
Conditional
Unconditional
TimeStamp
Refer to
Parameters you require often (Page 223).
Name: SendOnChange
Declaration: INPUT
Data type BOOL
Default: FALSE
Explanation Send on change.
Range of
values:
TRUE or FALSE
No parameter specified: Default value FALSE is valid.
Here, you specify whether the FB checks for changes within the acquired
data area (to determine whether at least one bit has changed). If a change is
detected, a transmission of the data area is triggered automatically. Whether
the entire area is transmitted or only the changed part can be specified with
the SendAll parameter (refer to the explanations on the relevant parameter).
If no parameter is specified, the default is FALSE; in other words, there is no
change-driven data transmission. Transmission must then be triggered by
the user at the TriggerInput input parameter.
Name: TriggerInput
Declaration: INPUT