Setting The Bus Coupler Parameters; Setting Parameters For The Modules; Error-Response Parameters; Bus Coupler Diagnostic Data - Emerson AVENTICS Modbus TCP Manual De Instrucciones

Bit 7 Bit 6 Bit 5
Word
1 LB Valve 4 Valve 4 Valve 3
Sol. 12 Sol. 14 Sol. 12
2 LB – – –
3 LB – – Valve 9
Sol. 12
4 LB Valve 13 Valve 13 Valve 12
Sol. 12 Sol. 14 Sol. 12
5 LB
5 HB Second pressure regulator byte
6 LB Valve 17 Valve 17 Valve 16
Sol. 12 Sol. 14 Sol. 12
7 LB Valve 21 Valve 21 Valve 20
Sol. 12 Sol. 14 Sol. 12
8 LB – – Valve 24
Sol. 12
9 LB 8DO8M8 8DO8M8 8DO8M8
(module (module (module
11) 11) 11)
X2O8 X2O7 X2O6
10 LB
1)
Bits marked with "–" are non-information bits. They may not be used and are as-
signed the value "0".
The input bytes are assigned as shown in g Table 9. The diagnostic data are ap-
pended to the input data and are always 8 bytes in length.
Table 9: Example assignment of input bytes (IB)
Bit 7 Bit 6 Bit 5
Word
0 - - -
1 LB
1 HB Second pressure regulator byte
2 8DI8M8 8DI8M8 8DI8M8
(module (module (module
9) 9) 9)
X2I8 X2I7 X2I6
3 8DI8M8 8DI8M8 8DI8M8
(module (module (module
10) 10) 10)
X2I8 X2I7 X2I6
4 LB
4 HB
5 LB Diagnostic byte (modules 1 to 8)
5 HB Diagnostic byte (bits 0 to 3: modules 9 to 12, bits 4 to 7 not assigned)
6 LB
6 HB
7 LB
7 HB
The length of the process data in the valve zone depends on the in-
stalled valve driver, see section
The length of the process data in the I/O zone depends on the selected
I/O module (see the system description of the respective I/O mod-
ules).

5.4 Setting the Bus Coupler Parameters

The characteristics of the valve system are influenced by the different parameters
that you set in the controller. You can use these parameters to determine the re-
sponses of the bus coupler and the I/O modules.
This section only describes the parameters for the bus coupler. The parameters of
the I/O zone and the pressure regulators are explained in the system description
of the individual I/O modules or in the operating instructions for the AV-EP pres-
sure regulators. The system description of the bus coupler explains the parame-
ters for the valve driver boards.
The following parameters can be set for the bus coupler:
• Response to an interruption in communication for Modbus TCP
• Response to an error (backplane failure)
AVENTICS™ Modbus TCP | R412028202-BAL-001-AC | English
Bit 4 Bit 3 Bit 2
Valve 3 Valve 2 Valve 2
Sol. 14 Sol. 12 Sol. 14
– Valve 6 Valve 6
Sol. 12 Sol. 14
Valve 9 Valve 8 Valve 8
Sol. 14 Sol. 12 Sol. 14
Valve 12 Valve 11 Valve 11
Sol. 14 Sol. 12 Sol. 14
First pressure regulator byte
Valve 16 Valve 15 Valve 15
Sol. 14 Sol. 12 Sol. 14
Valve 20 Valve 19 Valve 19
Sol. 14 Sol. 12 Sol. 14
Valve 24 Valve 23 Valve 23
Sol. 14 Sol. 12 Sol. 14
8DO8M8 8DO8M8 8DO8M8
(module (module (module
11) 11) 11)
X2O5 X2O4 X2O3
Bus coupler parameter byte
Bit 4 Bit 3 Bit 2
- - -
First pressure regulator byte
8DI8M8 8DI8M8 8DI8M8
(module (module (module
9) 9) 9)
X2I5 X2I4 X2I3
8DI8M8 8DI8M8 8DI8M8
(module (module (module
10) 10) 10)
X2I5 X2I4 X2I3
Diagnostic byte (bus coupler)
Diagnostic byte (bus coupler)
Diagnostic byte (not assigned)
Diagnostic byte (not assigned)
Diagnostic byte (not assigned)
Diagnostic byte (not assigned)
g 6. Structure of the Valve Driver
• Sequence of the bytes
Bit 1 Bit 0
During cyclical operation, the parameters are set with the help of the parameter
Valve 1 Valve 1
byte, which is appended to the output data.
Sol. 12 Sol. 14
Valve 5 Valve 5
Bits 0 and 1 are not connected.
Sol. 12 Sol. 14
Valve 7 Valve 7
The response to an error in the backplane is defined in bit 2 of the parameter
Sol. 12 Sol. 14
byte.
Valve 10 Valve 10
• Bit 2 = 0: see section
Sol. 12 Sol. 14
• Bit 2 = 1: see section
The byte sequence of modules with 16-bit values is defined in bit 3 of the param-
eter byte (SWAP)
Valve 14 Valve 14
• Bit 3 = 0: 16-bit values are sent in big-endian format.
Sol. 12 Sol. 14
• Bit 3 = 1: 16-bit values are sent in little-endian format.
Valve 18 Valve 18
Sol. 12 Sol. 14

5.4.1 Setting parameters for the modules

Valve 22 Valve 22
The parameters of the modules can be written into the bus module from Holding
Sol. 12 Sol. 14
Register 80 (50hex). The parameters must be completely written before the
8DO8M8 8DO8M8
"Param_Set" bit in the "Run-Idle_Set" register is set.
(module (module
11) 11)
The parameters and configuration data are not saved locally by the bus
X2O2 X2O1
coupler. They must be sent from the PLC to the bus coupler and the in-
stalled modules on startup.

5.4.2 Error-response parameters

Response to a backplane malfunction
This parameter describes the response of the bus coupler in the event of a back-
plane malfunction. You can set the following responses:
Bit 1 Bit 0
Option 1 (bit 2 of the parameter byte = 0):
RUN_Set Param_S
• If there is a temporary backplane malfunction (triggered, e.g., by a spike in
et
the power supply), the IO/DIAG LED flashes red and the bus coupler sends a
warning to the controller. As soon as the communication via the backplane is
reinstated, the bus coupler returns to normal mode and the warnings are can-
8DI8M8 8DI8M8
celed.
(module (module
• In the event of a sustained backplane malfunction (e.g. due to the removal of
9) 9)
an end plate), the IO/DIAG LED flashes red and the bus coupler sends an error
X2I2 X2I1
message to the controller. The bus coupler simultaneously resets all valves
8DI8M8 8DI8M8
and outputs. The bus coupler tries to re-initialize the system. It sends the di-
agnostic message that the backplane is attempting re-initialization.
(module (module
10) 10)
– If the initialization is successful, the bus coupler resumes its normal opera-
X2I2 X2I1
tion. The error message is canceled and the IO/DIAG LED is illuminated in
green.
– If the initialization is not successful (e.g. due to the connection of new
modules to the backplane or a defective backplane), the bus coupler con-
tinues to send the diagnostic message to the controller that the backplane
is attempting re-initialization, and the initialization is restarted. LED IO/
DIAG continues to flash red.
Option 2 (bit 2 of the parameter byte = 1)
• For temporary backplane malfunctions, the response is identical to option 1.
• In the event of a sustained backplane malfunction, the bus coupler sends an
error message to the controller and the IO/DIAG LED flashes red. The bus cou-
pler simultaneously resets all valves and outputs. An initialization of the sys-
Data.
tem is not started. The bus coupler must be restarted manually (power reset)
in order to return it to normal mode.

5.5 Bus Coupler Diagnostic Data

5.5.1 Structure of the diagnostic data

The bus coupler sends 4 words of diagnostic data which is appended to the mod-
ule input data. A valve system consisting of a bus coupler and a module with 2
bytes of input data thus has a total of 5 words of input data. A valve system con-
sisting of a bus coupler and a module without input data has a total of 4 words of
input data.
The 4 words of diagnostic data contain
• 1 word of diagnostic data for the bus coupler and
• 2 words of group diagnostic data for the modules.
The diagnostic data is organized as shown in the following table.
g 5.4.2 Error-response parameters
g 5.4.2 Error-response parameters
option 1
option 2
33