ifm
Device manual AS-i M4 Gateway Profibus DPV1 (AC1375, AC1376)
2012-02-23
DP module 12: extended command channel
Commands in the extended command channel
235
OVx
output valid
1 bit
channel-independent bit "output data valid" from the slave:
CTT1:
0 = more than 3.5 s have elapsed since the last update of the output
values
1 = slave requests new output data within the next 3 s
CTT2…CTT5:
0 = slave receives no new output data
1 = slave receives new output data
NOTE:
only valid for analogue
out
put slaves.
For
in
put slaves set OVx = "0"!
TVx
transfer valid
1 bit
channel-independent bit "transfer valid" from the slave:
0 = error during transfer or: timeout
1 = transfer of analogue input/output data OK
TIx
transfer to the slave
(transfer Input)
1 bit
from master profile M4 onwards:
0 = slave transmits input data as a value
(15 bits long, plus sign)
1 = slave transmits input data as a bit pattern
(16 bits long, no sign)
TOx
transfer from the slave
(transfer output)
1 bit
from master profile M4 onwards:
0 = slave receives output data as a value
(15 bits long, plus sign)
1 = slave receives output data as a bit pattern
(16 bits long, no sign)
*)
IMPORTANT:
For the query read only the required bytes!
Unused bytes can contain information of previous queries.
