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Example: A 2x valve driver board with 4 bits of payload data occupies 1 byte in the
byte string, since the remaining 4 bits are stuffed with non-information bits. The
data of the next module therefore starts after a byte boundary.
The modules are numbered to the right of the bus coupler in the valve zone,
starting with the first valve driver board (module 1) and continuing to the last
valve driver board on the right end of the valve unit (module 9). See g Fig. 3.
Bridge cards are not taken into account. Supply boards and UA-OFF monitoring
boards occupy one module. See
OFF monitoring boards do not add any bytes to the input and output data. How-
ever, they are also counted, since they have diagnostic data. The data length for
pressure regulators can be found in the operating instructions for AV-EP pressure
regulators.
The numbering is continued in the I/O zone. There, numbering is continued start-
ing from the bus coupler to the left end.
M12/OB8
M11/IB2
M10/IB1
M1/OB1
UA
P
Fig. 3: Numbering of modules in a valve system with I/O modules
S1
Section 1
S3
Section 3
Power supply
UA
Single pressure control working con-
A
nection
Input byte
IB
-
Neither input nor output byte
Example
The example shows a valve system with the following characteristics. See
g Fig. 3.
• 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
Calculation of the valve system data lengths
The data lengths of the bus coupler and the modules are shown in the following
table.
Table 16: Calculation of the valve system data lengths
Module
Module
number
1
Valve driver board, 4x
AVENTICS™ AES OPC-UA | R412028203-BAL-001-AB | English
g Fig. 3
(module 7). The supply boards and UA-
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
Module
M
Pressure regulator with 16 bits of in-
AV-
put and output data
EP
Output byte
OB
Output data
Input data
1 byte of payload data
–
Module
Module
number
2
Valve driver board, 2x
3
Valve driver board, 3x
4
Valve driver board, 4x
5
Pressure regulator
6
Valve driver board, 4x
7
Electrical supply
8
Valve driver board, 4x
9
Valve driver board, 3x
M8/OB7
M9/OB8
S3
10
Input module (1 byte of pay-
load data)
11
Input module (1 byte of pay-
load data)
12
Output module (1 byte of
payload data)
Output data
The total length of the output data in the example configuration is 10 bytes.
The data length of the output data is 9 bytes on the valve side and 1 byte on the
IO side.
Input data
The total length of the input data in the example configuration is 4 bytes.
The data length of the input data is 2 bytes on the valve side and 2 bytes on the
IO side.
The valve system always sends the input and output data bytes in the same physi-
cal sequence. This cannot be changed.
Assignment of output bytes
After the PLC configuration, the output bytes are assigned as shown in the follow-
ing table.
Table 17: Example assignment of output bytes (OB)
Byte
Bit 7
OB1 V.-
Valve 4
side
Coil 12
OB2 V.-
–
side
OB3 V.-
–
side
OB4 V.-
Valve 13 Valve 13 Valve 12 Valve 12 Valve 11 Valve 11 Valve 10 Valve 10
side
Coil 12
OB5 V.-
First pressure regulator byte
side
OB6 V.-
Second pressure regulator byte
side
OB7 V.-
Valve 17 Valve 17 Valve 16 Valve 16 Valve 15 Valve 15 Valve 14 Valve 14
side
Coil 12
OB8 V.-
Valve 21 Valve 21 Valve 20 Valve 20 Valve 19 Valve 19 Valve 18 Valve 18
side
Coil 12
OB9 V.-
–
side
OB1 I/O
8DO8M8 8DO8M8 8DO8M8 8DO8M8 8DO8M8 8DO8M8 8DO8M8 8DO8M8
side
(mod-
ule 11)
X2O8
Output data
1 byte
(4 bits of payload data
plus 4 non-information
bits)
1 byte
(6 bits of payload data
plus 2 non-information
bits)
1 byte of payload data
2 byte of payload data
1 byte of payload data
–
1 byte of payload data
1 byte
(6 bits of payload data
plus 2 non-information
bits)
Total data length of
output data valve side:
9 bytes
–
–
1 byte of payload data
Total data length of
output data I/O side: 1
byte
Bit 6
Bit 5
Bit 4
Bit 3
Valve 4
Valve 3
Valve 3
Valve 2
Coil 14
Coil 12
Coil 14
Coil 12
–
–
–
Valve 6
Coil 12
–
Valve 9
Valve 9
Valve 8
Coil 12
Coil 14
Coil 12
Coil 14
Coil 12
Coil 14
Coil 12
Coil 14
Coil 12
Coil 14
Coil 12
Coil 14
Coil 12
Coil 14
Coil 12
–
Valve 24 Valve 24 Valve 23 Valve 23 Valve 22 Valve 22
Coil 12
Coil 14
Coil 12
(mod-
(mod-
(mod-
(mod-
ule 11)
ule 11)
ule 11)
ule 11)
X2O7
X2O6
X2O5
X2O4
Input data
–
–
–
2 byte of payload
data
–
–
–
–
Total data length of
input data valve
side: 2 bytes
1 byte of payload
data
1 byte of payload
data
–
Total data length of
input data I/O side:
2 bytes
1)
Bit 2
Bit 1
Bit 0
Valve 2
Valve 1
Valve 1
Coil 14
Coil 12
Coil 14
Valve 6
Valve 5
Valve 5
Coil 14
Coil 12
Coil 14
Valve 8
Valve 7
Valve 7
Coil 14
Coil 12
Coil 14
Coil 14
Coil 12
Coil 14
Coil 14
Coil 12
Coil 14
Coil 14
Coil 12
Coil 14
Coil 14
Coil 12
Coil 14
(mod-
(mod-
(mod-
ule 11)
ule 11)
ule 11)
X2O3
X2O2
X2O1
16
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