ifm
Device manual AS-i M4 Gateway Profibus DPV1 (AC1375, AC1376)
2012-02-23
Function
Introduction AS-i data
25
strAnalogSlave – fields with analogue I/O data
5338
Bit
Word
no.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
analogue data channel 0 from/to slave 1 or:
analogue data channel 0 from/to slave 1A
1
analogue data channel 1 from/to slave 1 or:
analogue data channel 1 from/to slave 1A
2
analogue data channel 2 from/to slave 1 or:
analogue data channel 0 from/to slave 1B
3
analogue data channel 3 from/to slave 1 or:
analogue data channel 1 from/to slave 1B
4
TIB TOB TIA TOA TVB OVB
TVA OVA
O3 V3 O2 V2 O1 V1 O0 V0
...
table Details of the slave assignment (
→
page
150
analogue data channel 0 from/to slave 31 or:
analogue data channel 0 from/to slave 31A
151
analogue data channel 1 from/to slave 31 or:
analogue data channel 1 from/to slave 31A
152
analogue data channel 2 from/to slave 31 or:
analogue data channel 0 from/to slave 31B
153
analogue data channel 3 from/to slave 31 or:
analogue data channel 1 from/to slave 31B
154
TIB TOB TIA TOA
TVB
OVB
TVA
OVA
O3 V3 O2 V2 O1 V1 O0 V0
Legend:
Vn
valid bit
1 bit
0 = values in channel n are invalid
1 = values in channel n are valid
Output data must be valid (Vn = 1) to be enabled in the AS-i slave!
On
overflow bit
1 bit
0 = data is in the valid range
1 = data is in the invalid range (especially in case of input modules when
the measuring range is not reached or exceeded)
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)
