Parameter - Aventics LP04 DDL Mode D'emploi

Table 4: Diagnosis bits
Byte
7
Z DDL
comm.
diagnosis
Z+1 Valve 4 Valve 4
12
diagnosis diagnosis
Z+2 Valve 8 Valve 8
12
diagnosis diagnosis
Z+3 Valve 12 Valve 12
12
diagnosis diagnosis
Z+4 Valve 16 Valve 16
12
diagnosis diagnosis
Explanation of the bits:
Byte Z bit 0: Power supply for electronics is
smaller than 19.2 V or larger than 28.8 V
Byte Z bit 1: Power supply for valves is smaller
than 21.6 V or larger than 26.4 V
Byte Z bit 7: Communication to DDL module
disconnected.
Byte (Z + 1) - (Z + 4) bit 0–7: Short-circuit at output
or output is open (see description of the
parameters). Byte Z is the start address for the
diagnosis section of this DDL participant in the pilot
control.

3.4.3 Parameter

The valve terminal system provides these functions
to the DDL bus module. The parameter bytes can be
used depending on the type of field bus system. The
valve terminal system provides the bus module with
a 1-byte parameter.
Table 5: Parameters for the valve terminal system
Parameter
Bit
name
7 reserved
6 reserved
5 reserved
4 reserved
3 Reaction if DDL
fails
2 reserved
AVENTICS | VS LP04 DDL | R402000483-BDL-001-AD
6 5
– –
Valve 3
14 12
diagnosis diagnosis
Valve 7
14 12
diagnosis diagnosis
Valve 11 Valve 11
14 12
diagnosis diagnosis
Valve 15 Valve 15
14 12
diagnosis diagnosis
Bit = 0 Bit = 1
Values at 0 Freeze
(default) values
Bit
4 3
– –
Valve 3 Valve 2
14 12
diagnosis diagnosis
Valve 7 Valve 6
14 12
diagnosis diagnosis
Valve 10
14 12
diagnosis diagnosis
Valve 14
14 12
diagnosis diagnosis
Table 5: Parameters for the valve terminal system
Parameter
Bit
name
1 Diagnosis
message on the
coils
0 reserved
A short-circuit is only noticable if the output is
being triggered. An open output is only noticable
if it is not being triggered.
Bit 1 = 0
Output-related diagnosis messages are only sent if
the output is triggered. No check of the available
coils is performed when the system is switched on.
If an output with no coil is being triggered, a
diagnosis message will be generated.
Bit 1 = 1
A single check of the available coils is run when the
system has been switched on. This information is
then transmitted to the pilot control as a diagnosis
message. This message can be compared with a
system configuration that has been stored in the
pilot control. (This function is only supported by
Profibus DP, the diagnosis data is transmitted
cyclically with other field bus systems).
2 1
– 24 V valve
power
diagnosis
Valve 2 Valve 1
14 12
diagnosis
Valve 6 Valve 5
14 12
diagnosis
Valve 10 Valve 9
14 12
diagnosis
Valve 14 Valve 13
14 12
diagnosis
Bit = 0 Bit = 1
For triggered Changes
outputs are
(default) transmitte
d
NOTICE
15
0
24 V
electron-
ics power
diagnosis
Valve 1
14
diagnosis
Valve 5
14
diagnosis
Valve 9
14
diagnosis
Valve 13
14
diagnosis