Block library TeleControl ST7
5.7 Master copies
TIM 1531 IRC
Operating Instructions, 02/2018, C79000-G8976-C468-02
183
Note
Remember double word boundaries
When changed data is transferred and the data area contains values in double word format,
make sure that the double word values are actually loc
ated in one of the maximum 12
double words of the data area to be acquired.
Distribution over two consecutive data double words could lead to the transfer of only one
word of the double word value (high or low word) because a change has occurred in only
th
at particular word. In this case, the missing word can lead to a data error on the receiving
partner (applies to ST7cc, not for an S7 CPU).
Note
DB with standard access
The block has parameters of the "ANY" type. Therefore, leave the "Optimized block a
ccess"
attribute in the properties of the DB disabled.
For a description, see section Reoccurring parameters (Page 144).
With the setting TRUE, the block
runs a change check within the acquired
data area "DataInput". The block checks whether at least one bit has
changed. If a change is detected, a transfer of the data area is started aut
o-
matically. You specify whether the entire area is transferred or only
the
changed part with the "SendAll" parameter.
If the setting is FALSE, you need to trigger the transfer via the input parameter
"TriggerInput".