Here you may check if the data transfer is still running or if the data fetch res. transmis-
sion is already finished. By means of the bit "Enable/Disable" you may block the data
transfer for this order (Disable = 1; Enable = 0).
n Bit 4 - Data fetch / Data transmission is active
– Set:
Per handling block SEND or RECEIVE, if the fetch/transmission has been started,
e.g. when data is transferred with the ALL-function (DMA-replacement), but the
impulse came per SEND-DIRECT.
– Delete:
Per handling blocks SEND or RECEIVE, if the data transfer of an order is finished
(last data block has been transferred).
– Analyze:
Per user: During the data transfer CP <<->> AG the user must not change the
record set of an order. This is uncritical with PRIO 0/1 orders, because here the
data transfer is realizable in one block cycle. Larger data amounts however are
transferred in blocks during more AG cycles. To ensure data consistency you
should proof that the data block isn’t in transfer any more before you change the
content!
n Bit 5 - Data transmission is active
– Set:
Per handling block SEND, when the data transition for an order is ready.
– Delete:
Per handling block SEND, when the data transfer for a new order has been
started (new trigger). Per user: When analysis is ready (flank creation).
– Analyze:
Per user: Here you may ascertain, if the record set of an order has already been
transferred to the CP res. at which time a new record set concerning a running
order (e.g. cyclic transition) may be started.
n Bit 6 - Data fetch active
– Set:
Per RECEIVE, when data fetch for a new order has been finished.
– Delete:
Per RECEIVE, when data transfer to AG for a new order (new trigger) has been
started. Per user, when analyzing (edge creation).
– Analyze:
Per user: Here you may ascertain, if the record set of an order has already been
transferred to the CP res. at what time a new record set for the current order has
been transferred to the AG.
n Bit 7 - Disable/Enable data block
– Set:
Per user: to avoid overwriting an area by the RECEIVE block res. data transition
of an area by the SEND block (only for the first data block).
– Delete:
Per user: to release the according data area.
– Analyze:
Per handling blocks SEND and RECEIVE: if Bit 7 is set, there is no data transfer
anymore, but the blocks announce an error to the CP.
Data management Byte 1,
Bit 4 ... Bit 7
VIPA SPEED7
System Blocks
Fetch/Write Communication > SFC 230 ... 238 - Page frame communication
HB00 | OPL_SP7 | Operation list | en | 18-30 893
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