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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 87.
Leuze electronic
Triggering scanner
Reception of data
Has the slave
received 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
248i
Transmit the next
data with toggle bit
R-ACK = ! R-ACK
(control bit 1.0)
Modes
63
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