232
ifm
Device Manual SmartSPS AC14 with EtherNet/IP interface (AC1421, AC1422), Firmware 3.1.2
2015-11-30
Appendix
Fieldbus EtherNet/IP
Details of the words shown above:
Offset
Word no.
bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
n
--
TOB
--
TOA
--
OVB
--
OVA
reserved
Legend:
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
Only valid for analogue
out
put slaves.
For
in
put slaves set OVx = "0"!
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)
