21
3D sensor
UK
9.3.2 Transmit process values of the completeness monitoring via PROFINET
The device can transmit the process values to a PLC via the PROFINET fieldbus. The process values are
displayed in the ifm Vision Assistant as output string as below:
Only one fieldbus can be active at a time. The fieldbus is adjustable (→ software manual).
In the output string the process values are separated by a semicolon. The output string is transferred to a
PLC in the displayed sequence.
Observe the following remarks for the transmission of the output string to a PLC:
●
Bytes 0 to 7 are part of the output string. They are not displayed in the ifm Vision Assistant (see
screenshot above).
●
Semicolons ";" in the output string are not transferred.
●
Float values are converted into 16-bit integers before the transmission.
●
All numerical values are converted into binary 16-bit integers before the transmission.
The output string is composed of the following:
star
;
0
;
00
;
0
;
+0.000
;
01
;
7
;
-0.068
;
02
;
6
;
+0.013
;
03
;
0
;
+0.001
;
stop
Byte no.
Data
Coding
Process
value
Unit
Description
Comments
0
2#0010_0000 Binary
0.5
Duplicated
command word
●
Bit 0.5 shows a successful
trigger command
1
2#0000_0000 Binary
2
2#0000_0000 Decimal
Synchronous /
asynchronous
message identification
3
2#0000_0000 Decimal
4
0
Decimal
30
Message counter
●
The device has received
30 messages.
●
Increments by 1 with each
action (trigger, message
sent etc.).
5
30
Decimal
6
0
Decimal
Reserved
7
0
Decimal
8
s
ASCII
star
Start string
9
t
ASCII
10
a
ASCII
11
r
ASCII
12
0
Decimal
0
Status of all ROIs
(0 = bad, 1 = good)
Shows the status of the
completeness monitoring
13
0
Decimal
14
0
Decimal
0
ROI ID
With activated position
adjustment bytes 14 and 15
are used by it.
0 = position is not adjusted
1 = position is adjusted
All following data is shifted
by 2 bytes; i.e. the first ROI
ID starts with bytes 16 and
17.
15
0
Decimal
