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The bus coupler's parameter data is annexed to the output data in the byte chain.
The bit assignments of the bus coupler are described in section
Bus Coupler
Parameters.
The diagnostic data of the valve system is 8 bytes in length and is appended to
the input data. For the breakdown of diagnostic data see section
pler Diagnostic
Data.
INFO: In the example, it is assumed that the first word has the address "0".
If the PLC can only assign the address "1" to the first word, an offset of 1 must be
added to all addresses.
M12/OB8
M11/IB2
M10/IB1
M1/OB1
UA
P
Fig. 10: Numbering of modules in a valve system with I/O modules
S1
Section 1
S3
Section 3
UA
Power supply
A
Single pressure control working con-
nection
IB
Input byte
-
Neither input nor output byte
The symbols for the valve zone components are explained in sec-
tion g 12.2 Valve
Zone.
Example
The example shows a valve system with the following characteristics. See
g Fig. 10.
• Bus coupler
• Section 1 (S1) with 9 valves
– Valve driver board, 4x
– Valve driver board, 2x
– Valve driver board, 3x
• Section 2 (S2) with 8 valves
– Valve driver board, 4x
– Pressure regulator with 16 bits of input and output data
– Valve driver board, 4x
• Section 3 (S3) with 7 valves
– Supply board
– Valve driver board, 4x
– Valve driver board, 3x
• Input module
• Input module
• Output module
The PLC configuration key for the entire unit is thus:
423–4M4U43
8DI8M8
8DI8M8
8DO8M8
The data lengths of the bus coupler and the modules are shown in the following
table.
Calculation of the valve system data lengths
Table 7: Word addresses
Module number
Module name
--
Bus coupler sta-
tus
1
Valve driver
4 valves (4)
2
Valve driver
2 valves (2)
AVENTICS™ Modbus TCP | R412028202-BAL-001-AC | English
g 5.4 Setting the
M2/OB2
M3/OB3
M4/OB4
M5/OB5
M6/OB6
M7/–
AV-EP
(M)
P
A
UA
S1
S2
S2
Section 2
P
Pressure supply
M
Module
AV-
Pressure regulator with 16 bits of in-
EP
put and output data
OB
Output byte
Output payload
Input payload
data (words)
data (words)
0
0
1
--
2
--
Module number
3
g 5.5 Bus Cou-
4
5
6
7
M8/OB7
M9/OB8
8
9
10
S3
11
12
Creating process data and diagnostic data table
Using the web server, the configuration can be retrieved to create the process
data and diagnostic data table.
Fig. 11: Configuration display on the web server
The total length of the output data in the example configuration is 11 words. Of
this, 10 words are the module output data and 1 word is the bus coupler parame-
ter word.
The total length of the input data in the example configuration is 8 words. This
consists of 4 words of module input data and 4 words of module diagnostic data.
The valve system always sends and receives the input and output words in the
same physical sequence. These cannot be changed. In most masters, however,
alias names can be assigned to the data, making it possible for users to select any
desired names for the data.
After the PLC configuration, the output words are assigned as shown in the fol-
lowing table. The bus coupler parameter word is appended to the output word of
the modules.
To activate the output data, additionally the "RUN_Set" bit must be set in word 0.
To transfer the parameter data, the "Param_Set" bit must be set. For further in-
Output data for
formation, see
parameters
--
Table 8: Example assignment of output bytes (OB)
Bit 7
Word
--
0 LB
--
Module name
Output payload
data (words)
Valve driver 3
3
valves (3)
Valve driver
4
4 valves (4)
Pressure con-
5
troller
16Bit-E (M)
Valve driver
6
4 valves (4)
Valve power sup-
--
ply (U)
Valve driver
7
4 valves(4)
Valve driver
8
3 valves(3)
I/O modules dig.
--
(8DI8M8)
I/O modules dig.
--
(8DI8M8)
I/O modules dig.
9
(8DO8M8)
Bus coupler pa-
10
rameters
Bus coupler diag-
--
nosis
Valve driver 4 valves(4)
Valve driver 2 valves(2)
Valve driver 3 valves(3)
Valve driver 4 valves(4)
Pressure controller 16Bit-E (M)
Valve driver 4 valves(4)
Valve power supply (U)
Valve driver 4 valves(4)
Valve driver 3 valves(3)
IO-Module dig. (8DI8M8)
IO-Module dig. (8DI8M8)
IO-Module dig. (8DO8M8)
g 5.7 Transfer parameters and start the valve
Bit 6
Bit 5
Bit 4
-
-
-
-
Input payload
Output data for
data (words)
parameters
--
--
--
--
1
80-84
--
--
--
--
--
--
--
--
2
--
3
--
--
--
--
--
4-7
--
system.
1)
Bit 3
Bit 2
Bit 1
Bit 0
-
-
RUN_Set Param_S
et
32
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