14
ENS 3000 IO-Link
Edition: 2020-04-20
HYDAC ELECTRONIC GMBH
Part No.: 669898
2 further bits function as switching bits ("BDC" = "Binary digital channel"), which can be
parameterised just as physical transistor switches (please see
chapter
10.4
Parameterisation in SDCI mode
or
chapter
24
Anhang / Annex: IODD
Einstellparameter / IODD Setting Parameters
).
The process bits are arranged in one or 2 data words in accordance with Table 1. In order
to receive the physical measured value for further processing in the controller, a bit shift
operation must first be carried out for each data word (shift right 2).
Table 1 - IO-Link Process data structure, arrangement of der PDV and BDC bits
sub index bit offset
data type
name
description
1
0
Boolean
BDC1
Fluid level - switching bit 1
2
1
Boolean
BDC2
Fluid level - switching bit 2
3
2
14-bit UInteger PDV1
Process value 1 = Fluid level
4
16
Boolean
BDC3
Temperature – Switching bit 3
5
17
Boolean
BDC4
Temperature – Switching bit 4
6
18
14-bit Integer PDV2
Process value 2 = Temperature
The figures below show the arrangement and the order of the bits and octets for the
version with a temperature sensor:
Octet 0 and 1
Octet 0
bit
offset
31 30 29 28 27 26 25 24
sub index
6
element
bit
13 12 11 10 9 8 7 6
Octet 1
bit
offset
23 22 21 20 19 18 17 16
sub index
6
5
4
element
bit
5 4 3 2 1 0
Octet 2
bit
offset
15 14 13 12 11 10 9 8
sub index
3
element
bit
13 12 11 10 9 8 7 6
Octet 3
bit
offset
7 6 5 4 3 2 1 0
sub index
3
2
1
element
bit
5 4 3 2 1 0
NOTICE:
Direct access via the subindex number is not supported. In the version without a
temperature sensor only 2 octets are transmitted.