Leuze electronic MA 258i Operating Instructions Manual page 66

Modes
Collective mode sequence diagram
Send long online commands to the DEV, read RS 232 answer from DEV
No
Figure 11.1: Data transmission scheme with long online commands
64
Sending of data
Number < 254
Enter user data that are to
be sent into output data
words starting at Out 2
DLC = number of
binary-coded data
bytes
Send data in the transmit
buffer with the
CTB = ! CTB toggle bit
(control bit 1.3)
No
*)
Command ok?
W-ACK = ! W-ACK
(status bit 0.0)
(Display!)
Yes
All desired data in the buf-
fer?
Yes
Send data with the
SFB = ! SFB toggle bit
(control bit 1.2)
No
*)
Command ok?
W-ACK = ! W-ACK
(status bit 0.0)
(Display!)
Activate Collective
mode
No
Select
function mode in
PLC via EDS file?
Yes
Save toggle bits
as process image
Reception of data
in the receive buffer?
Confirm data retrieval with
R-ACK = ! R-ACK
MA 258i
Data is transferred
and must be saved
Transmit the next
Is there still data
data with toggle bit
Yes
DEX = 1 set R-ACK = ! R-ACK
(status bit 0.3)
(control bit 1.0)
No
toggle bit
(control bit 1.0)
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