Leuze electronic MA 258i Operating Instructions Manual page 69

Triggering the ident devices and reading the data
Figure 11.3: Activating DEV and reading data
Notice!
Further information on fieldbus telegram structure can be found in chapter 10.1. A specification
of all usable commands can be found in chapter "Specifications for Leuze end devices" on
page 97.
Leuze electronic
Triggering scanner
Reception of data
Has the slave re-
ceived data from the
RS 232?
BLR = ! BLR
Yes
Rescue data
e.g. data block
DLC = number of valid
binary-coded data bytes
Is there still data
in the receive buffer?
DEX = 1 set
(status bit 0.3)
No
No
Confirm data retrieval
with toggle bit
R-ACK = ! R-ACK
(control bit 1.0)
MA 258i
Transmit the next
data with toggle bit
R-ACK = ! R-ACK
(control bit 1.0)
Modes
67