Festo VAEM-V-S8EPRS2 User manual

8127480
VAEM-V-S8EPRS2
Valve control module
8127480
2020-07
[8127482]
Operating instructions

Translation of the original instructions
CODESYS®, MODBUS® are registered trademarks of the respective trademark owners in certain coun-
tries.
2 Festo — VAEM-V-S8EPRS2 — 2020-07

3Festo — VAEM-V-S8EPRS2 — 2020-07
1 Applicable documents................................................................................................. 4
2 Safety........................................................................................................................... 4
2.1 Safety instructions........................................................................................................ 4
2.2 Intended use................................................................................................................ 4
2.3 Training of skilled personnel........................................................................................ 4
3 Additional information................................................................................................ 5
4 Service..........................................................................................................................5
5 Product overview......................................................................................................... 5
5.1 Functions...................................................................................................................... 5
5.1.1 Valve parameter settings........................................................................................ 5
5.1.2 Holding current reduction.......................................................................................6
5.2 Product design............................................................................................................. 7
5.2.1 Control elements.....................................................................................................7
5.2.2 Connecting elements.............................................................................................. 8
6 Commissioning............................................................................................................ 9
6.1 Connection settings...................................................................................................... 10
7 Parameterisation......................................................................................................... 11
7.1 Parameter structure...................................................................................................... 11
7.2 Architecture ASCII telegram.......................................................................................... 13
7.3 Architecture of ModbusTCP......................................................................................... 14
7.4 Parameter description.................................................................................................. 17
7.4.1 System parameters.................................................................................................17
7.4.2 Configuration parameters per valve........................................................................24
8 Cleaning...................................................................................................................... 25
9 Malfunctions............................................................................................................... 25
9.1 Diagnostics................................................................................................................... 25
9.2 Fault clearance............................................................................................................. 26
9.2.1 Resetting the active error bit...................................................................................26
9.2.2 System faults..........................................................................................................26
9.2.3 Valve faults.............................................................................................................26
9.2.4 Communication errors............................................................................................ 27
10 Disposal........................................................................................................................28
11 Technical data............................................................................................................. 28
Table of contents

1 Applicable documents
All available documents for the product èwww.festo.com/sp.
Documents Product Contents
Brief instruction valve control module
VAEM-V-S8EPRS2
Installation, Parameterisation
Assembly instruc-
tions
H-rail mounting VAME-V3-H –
Application Note valve control
module VAEM-V-S8EPRS2
Connection via Ethernet in CODESYS
Application Note valve control module
VAEM-V-S8EPRS2
Combination of VTOE-8... and
VAEM-V-S8...
Software valve control module
VAEM-V-S8EPRS2
GUI for the valve control module
Software valve control module
VAEM-V-S8EPRS2
API for the valve control module
Tab. 1 Applicable documents
2 Safety
2.1 Safety instructions
– Only use the product in original status without unauthorised modifications.
– Only use the product if it is in perfect technical condition.
– Take into consideration the ambient conditions at the location of use.
– Prior to mounting, installation and maintenance work: Switch off power supply and secure it from
being switched back on.
2.2 Intended use
The product is designed for control of solenoid valves by holding current reduction and it is intended
for industrial operation in enclosed spaces.
2.3 Training of skilled personnel
Installation, commissioning, maintenance and disassembly should only be conducted by qualified per-
sonnel.
The specialized personnel must be familiar with the installation and operation of electrical and pneu-
matic control systems.
Applicable documents
Festo — VAEM-V-S8EPRS2 — 2020-074

3 Additional information
– Accessories èwww.festo.com/catalogue.
4 Service
Contact your regional Festo contact person if you have technical questions èwww.festo.com.
5 Product overview
The product is an electronic control with integrated, adjustable holding current reduction for con-
trolling solenoid valves. Communication takes place via a COM interface using the ASCII protocol or
via an Ethernet interface using the ModbusTCP protocol in accordance with the client-server principle.
5.1 Functions
5.1.1 Valve parameter settings
The product offers the following functions, which can be set via parameters.
– set nominal voltage
– read nominal voltage
– select valve
– read valve selection
– set switching time
– read switching time
– set delay time
– read delay time
– set pickup time
– read pickup time
– set inrush current
– read inrush current
– set hit-and-hold actuation
– read hit-and-hold actuation
– set hit-and-hold actuation time
– read hit-and-hold actuation time
Additional information
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Fig. 1 Valve parameter description
Legend Valve parameters Description
1T_Delay Delay time
2T_Inrush Pickup time
3T_Tau Current reduction time
4T_On Switching time
5T_Switch_Off Cooldown
Parameters cannot be set individually
T_Switch_Off is a constant 4ms
6I_Inrush Inrush current
7I_Hold Holding current
Tab. 2
5.1.2 Holding current reduction
Function description
The integrated holding current reduction reduces the current consumption to the set holding current
after the adjustable pickup time has elapsed.
With holding current reduction, the output current of the valve is measured and the signal at the VAEM
output is adjusted and controlled in accordance with the set parameters.
– Reduction of the heat development of the solenoid valve coil
– Increased service life of solenoid valves
– Lower power consumption
– Improvement of the switching times of solenoid valves
Product overview
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1Delay time
2Pickup time
3Current reduction time
4Switching time
5Cooldown
6Inrush current
7Holding current
Fig. 2 Holding current reduction
5.2 Product design
1Housing with mounting flange
2Terminal [X5]: valves 1 … 4
3Status indication: LED
4Port [X3]: RS232
5Port [X2]: Ethernet
6Connection [X1], pin 5: trigger input
7Connection [X1], pin 1: power supply
8Switch [X4]: baud rate
9Terminal [X6]: valves 5 … 8
Fig. 3 Product design and connections
5.2.1 Control elements
Switch [X4]
The transmission speed of the communication interface [X3] is set at switch [X4].
Product overview
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baudrate [kBd] 9.6 19.2 57.6 115.2
Switching position
Tab. 3 Setting the baud rate
5.2.2 Connecting elements
WARNING!
Risk of injury due to electric shock.
• For the electrical power supply with extra-low voltages, use only PELV circuits that guarantee a
reinforced isolation from the mains network.
• Observe IEC60204-1/EN60204-1.
NOTICE!
Material damage due to incorrect or incomplete installation.
The following conditions must be fulfilled for commissioning:
• The system must be fully assembled.
• The electrical installation must be complete and checked.
Connection [X1]
The connection [X1] shows the power supply and the trigger input.
Plug pattern Pin Function
1 Power supply: 24V DC
2 Power supply: GND
3 Functional earth
4 Trigger input: GND
5 Trigger input: 24V DC
Tab. 4 Pin allocation connection [X1]
Ports [X5] and [X6]
The connections [X5] and [X6] are each provided with a terminal to connect the valves.
Plug pattern Pin Function
terminal [X5]
1
2
Connection valve 1
3
4
Connection valve 2
Product overview
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Plug pattern Pin Function
5
6
Connection valve 3
7
8
Connection valve 4
terminal [X6]
1
2
Connection valve 8
3
4
Connection valve 7
5
6
Connection valve 6
7
8
Connection valve 5
Tab. 5 Pin assignment of terminals [X5] and [X6]
Port [X2]: Ethernet
The port [X2] in the version VAEM-V-S8EPRS2 is a TCP/IP communication interface via Ethernet.
Port [X3]: RS232
The port [X3] is for communications via the RS232 interface.
Plug pattern Pin Function
1 GND - Common Ground
2 RxD - Receive Data
3 TxD - Transmitt Data
4 NC - Not connected
Tab. 6 Port pin allocation [X3]
6 Commissioning
Commissioning and parameterisation via Festo software
Easier commissioning and parameterisation via Festo software èwww.festo.com/sp.
1. Connect the valves to the ports [X5] and [X6].
2. Connect communications cable with the COM interface and interface [X3].
Alternatively, connect the Ethernet communication cable and interface [X2].
Commissioning
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3. Assemble plug in accordance with the plug pattern è Tab. 4 Pin allocation connection [X1] and
plug into port [X1].
4. With RS232 communication:
Set required baud rate at the switch [X4].
5. Apply nominal voltage to the product.
ÄThe LED is green.
6. Establish and parameterise communications connection.
6.1 Connection settings
NOTICE!
Unauthorised Access to the Device Can Cause Damage or Malfunction.
• When connecting the device to a network, protect the network from unauthorised access.
Standards for security in information technology can be used for network protection meas-
ures,e.g. IEC62443, ISO/IEC27001.
The system and configuration parameters of the VAEM-V-S8EPRS2 can be set by
– ASCII telegrams via RS232
– ModbusTCP/TCP protocol via Ethernet
In order to communicate with the VAEM-V-S8EPRS2 via RS232, serial terminal software is required to
transmit the ASCII telegrams.
Connection settings via an RS232 connection
Connection settings are required to use the product with the serial interface module [X3] and terminal
software.
Setting Value
Port See connected COM-Port to Client
baudrate See setting on the product
è Tab. 3 Setting the baud rate
Data size 8
Parity None
Stop bit 1
Handshaking None
Mode Free
Tab. 7 Connection settings for RS232 communication
Ethernet connection settings
Setting Value
IP 192.168.178.1 (default)
Port 502 (ModbusTCP default)
Tab. 8 Ethernet connection settings
Commissioning
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When using multiple network interfaces, the Ethernet (TCP/IP) interface must be prioritised.
7 Parameterisation
7.1 Parameter structure
Access types and data types
Access type ASCII
abbrevi-
ation
HEX value Description
Read access R 00 The read access returns the set values in decim-
al.
Write access W 01 The write access overwrites the previously set
values.
Tab. 9 Access types
Data type ASCII abbrevi-
ation
HEX value Value range Description
uint64 U64 04 0 … 264-1 64bit unsigned
integer
uint32 U32 03 0 … 232-1 32bit unsigned
integer
uint16 U16 02 0 … 216-1 16bit unsigned
integer
uint08 U08 01 0 … 28-1 8bit unsigned
integer
Tab. 10 Data types
Ethernet system parameters
Function Index ASCII abbreviation HEX value
controllword Index 1 I1 01
statusword Index 2 I2 02
Saving parameter val-
ues
Index 11 I11 0B
nominal voltage Index 4 I4 04
inrush current Index 5 I5 05
Parameterisation
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Function Index ASCII abbreviation HEX value
holding current Index 6 I6 06
response time Index 7 I7 07
pickup time Index 8 I8 08
operating mode Index 9 I9 09
select valve Index 19 I19 13
time delay Index 22 I22 16
hit-and-hold actuation
time
Index 46 I46 01
Tab. 11 Parameter listing index with abbreviations
Addressing Subindex ASCII abbreviation HEX value
System Subindex 0 S0 00
Valve 1 Subindex 0 S0 00
Valve 2 Subindex 1 S1 01
Valve 3 Subindex 2 S2 02
…………
Valve 8 Subindex 7 S7 07
Tab. 12 Listing of subindex and addressing
Function Index
I
Hex
value
index
Data
type
Value range Default value Description
IPV4Address-
Soll
60
(with
subin-
dex 0)
3C Uint32 0
…429496729-
4 (decimal)
3232281089
(decimal)
èC0.A8.B2.01
è192.168.17-
8.1
Change destination IP
address in the network
In the event of a
change, a restart is
required.
Invalid IP addresses:
– 0.x.x.x
– 127.x.x.x
– 224.x.x.x
– 255.255.255.255
IPV4AddressIst 61 3D Uint32 0
…429496729-
4 (decimal)
3232281089
(decimal)
Display destination IP
address in the network
Parameterisation
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Function Index
I
Hex
value
index
Data
type
Value range Default value Description
ModbusTcp-
PortSoll
54 36 Uint16 0…50265535 502 (decimal) Change ModbusTCP
port.
In the event of a
change, a restart is
required.
ModbusTcp-
PortIst
55 37 Uint16 0…50265535 502 (decimal) Display ModbusTCP
port.
ModbusTcp-
TimeoutSoll
56 38 Uint16 0…50265535 0
(Timeout inact-
ive)
Change TCP/IP connec-
tion timeout.
Minimum timeout is
1000 ms.
Values between
0…1000 are increased
to 1000.
ModbusTcp-
TimeoutIst
57 39 Uint16 0…50265535 0 Display TCP/IP connec-
tion timeout.
Tab. 13 Valve control functions
7.2 Architecture ASCII telegram
1Command area with access type and data
type
2Separator
3Identification area with index and sub-index
4Transfer value
5Command end character
Fig. 4 Structure of the ASCII telegram
Command area
The access type and the data type are specified in the command area.
Identification area
The identification area consists of the index and the subindex. The index denotes the system paramet-
er. The subindex denotes the addressing at which the function of the system parameter is to be
executed.
Parameterisation
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Transfer value
When writing an ASCII telegram the transfer value must always be specified with V in front. When
reading, the transfer value is omitted and is returned as an answer.
Command end character
The command end character is not specified in this documentation because the need for a command
end character depends on the terminal software used.
7.3 Architecture of ModbusTCP
Parameter structure for sending via ModbusTCP
ModbusTCP is an open communication protocol with Client-Server architecture. The byte sequence is
based on the big endian system.
1Modbus TCP header
2Modbus TCP addressing function code 0x17
3Structure of Modbus TCP function and data
area function code 0x17
Fig. 5
ModbusTCP header
0Transaction number
2Protocol identifier
4Number of following bytes
5Device identification
Fig. 6 Modbus TCP header
Byte
no.
Num-
ber of
bytes
Designation Description Byte order
0 most significant byte
1
2 Transaction number Freely selectable
least significant byte
Parameterisation
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Byte
no.
Num-
ber of
bytes
Designation Description Byte order
2 most significant byte
3
2 Protocol identifier 0x0000 (default)
least significant byte
4 most significant byte
5
2 Number of bytes to
follow
Number of bytes of device
identifier, function code,
addressing and data area least significant byte
6 1 Device identification Freely selectable, unique
address, Slave-ID
00 (default)
Tab. 14 Structure of ModbusTCP Header
Structure of ModbusTCP addressing function code 0x17
7Function code
8Start address of the read registers
10 Number of registers read
12 Start address of the write registers
14 Number of registers written
16 Number of bytes written
Fig. 7 Structure of Modbus TCP addressing
Byte no.
trans-
mit
recei-
ve
Num-
ber of
bytes
Designation Description Byte order
7 7 1 Function code 0x17 (VAEM standard)
Reading and writing of data
8 - most significant byte
9 -
2 Start address of the
read registers
0x0000 (default value)
least significant byte
10 - most significant byte
11 -
2 Number of registers
read
0x0007 (default value)
least significant byte
12 - most significant byte
13 -
2 Start address of the
write registers
0x0000 (default value)
least significant byte
Parameterisation
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Byte no.
trans-
mit
recei-
ve
Num-
ber of
bytes
Designation Description Byte order
14 - most significant byte
15 -
2 Number of registers
written
0x0007 (default value)
least significant byte
16 8 1 Number of bytes writ-
ten
0x0E (default value)
Tab. 15 Structure of ModbusTCP addressing function code 0x17
Structure of ModbusTCP function and data area function code 0x17
17 Read/write function
18 Data type
19 System parameters index
21 Addressing parameter subindex
22 Error (reserved)
23 Data area
Fig. 8 Function and data area function code 0x17
Send
Byte
no.
Rece-
ive
Byte
no.
Num-
ber of
bytes
Designation Description Byte order
17 9 1 Read or write access 0x00: read access
0x01: write access
18 10 1 Data type Data type dependent on sys-
tem parameter index
è Tab. 10 Data types
19 11 Highest-value byte
20 12
2 Index Function to be executed
è Tab. 11 Parameter listing
index with abbreviations
è Tab. 31 Valve control
functions
Lowest-value byte
21 13 1 Subindex Addressing of the function at
system or valve
levelè Tab. 12 Listing of
subindex and addressing
Parameterisation
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Send
Byte
no.
Rece-
ive
Byte
no.
Num-
ber of
bytes
Designation Description Byte order
22 14 1 Error Reserved for error return
23 15 Highest-value byte
24 16
25 17
26 18
27 19
28 20
29 21
30 22
8 Data area
Write: transfer value
Read: place holder 0
Return: return value
Transfer value dependent on
the data type
uint64: Byte 23…30
uint32: Byte 27…30
uint16: Byte 29…30
uint8: Byte 30
Unused bytes have the
default value 0x00
Lowest-value byte
Tab. 16 Structure of ModbusTCP function and data area function code 0x17
7.4 Parameter description
7.4.1 System parameters
controllword
The control word is used for:
– Stopping the valves before the operating time has elapsed
– Resetting the active error bit
– Manual start (only in operating mode 1)
The control word is a 16-digit binary code. To transfer the binary code of the check word, it must be
converted into a decimal (RS232 communication) or hexadecimal (Ethernet communication) value.
The individual digits of the binary code represent the individual operating functions of the product
from right to left. Bits 4 … 15 are reserved and without function.
Bit Designation Status 0 Change of status 0à1
0 Start Normal status Starts all selected valves (only possible in
operating mode 1)
1 - Reserved, without function
2 Stop Normal status Stops the operation of all selected valves
until the next change of status 1à0
(only possible in operating mode 1)
3 Reset error
message
Normal status Stops the operation of all selected valves
and resets the active error bit in the
status word
Parameterisation
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Bit Designation Status 0 Change of status 0à1
4 … 15 - Reserved, without function
Tab. 17 Meanings of the bits in the control word
Access Data type Index I Subindex S Value V Example of an ASCII tele-
gram
W (Write) U 16 1 0 x WU16:I1S0Vx
R (Read) U16 1 0 - RU16:I1S0
Tab. 18 Architecture ASCII telegram control word
Access Data
type
System
paramet-
ers index
Address-
ing para-
meter
subindex
Transfer
value
Example of data area ModbusTCP
0x01
(write)
0x02
(Uint16)
0x01 0x00 xx 01 02 0001 00 00 xxxx xxxx
xxxx xxxx
0x00
(read)
0x02
(Uint16)
0x01 0x00 0x00 00 02 0001 00 00 0000 0000
0000 0000
Tab. 19 Architecture of ModbusTCP: control word
Example of use of the check word
Situation: starting all selected valves
1. Reset control word.
– Via ASCII telegram: WU16: I1S0V0
– Using ModbusTCP: 0000 0000 0019 00 17 0000 0007 0000 0007 0E 01 02
0001 00 00 0000 0000 0000 0000
2. Set bit 1 of the control word.
– Via ASCII telegram: WU16: I1S0V1
– Using ModbusTCP: 0000 0000 0019 00 17 0000 0007 0000 0007 0E 01 02
0001 00 00 0000 0000 0000 0001
ÄStart all selected valves.
statusword
The status word is used for:
– Reading the operating mode and readiness for operation
– Error status and error detection
The status word is a 16-digit binary code. To interpret the status word, the returned decimal (RS232
communication) or hexadecimal (Ethernet communication) value must be converted into a binary
code.
The individual digits of the binary code represent the individual status indicators from right to left. The
individual bits are shown in the table from top to bottom.
Parameterisation
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Bit Designation Meaning
Status 0 Status 1
0 Status No valve active ³ 1 valve active
1 - Reserved, without function
2 - Reserved, without function
3 Error bit no error Error
4 Operational readi-
ness
–³ 1 valve in operation
– No valve selected
– Error
– Stop active
³ 1 valve selected and ready to
start
5 - Reserved, without function
6
7
operating mode 00: operating mode 1
01: operating mode 2
10: operating mode 3
11: reserved
8 Valve 1 – Valve not selected
– Error on selected valve
– No valve connected
Valve selected
... ... ... ...
15 Valve 8 – Valve not selected
– Error on selected valve
– No valve connected
Valve selected
Tab. 20 Meanings of the bits in the status word
Access Data type Index I Subindex S Value V Example of an ASCII tele-
gram
R U16 2 0 - RU16:I2S0
Tab. 21 Architecture of ASCII telegram: query status word
Access Data
type
System
paramet-
ers index
Address-
ing para-
meter
subindex
Transfer
value
Example of data area ModbusTCP
0x00
(read)
0x02
(Uint16)
0x02 0x00 0x00 00 02 0002 00 00 0000 0000
0000 0000
Tab. 22 Architecture of ModbusTCP: query status word
Parameterisation
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Examples of meanings of the statuses of the status word
The following combinatorics are based on the fact that irrelevant bits are omitted or occur without a
value in the table.
Combinatorics of the binary code Meaning
Bit valve Bit 7 Bit 6 Bit 4 Bit 3 Bit 0
0 0 Product is in operating mode 1.
0 1 Product is in operating mode 2.
1 0 Product is in operating mode 3.
1 The valves that have state 1 in the valve bit
are selected valves.
1 0 0 Product is ready to go.
0 0 1 Error at all selected valves which have the
state 0 at the corresponding bit valve.
Tab. 23 Combinatorics of the states of the status word
set operating mode
The product can be operated in three different modes. They differ in cycle time, cycle start and trigger.
Fig. 9 Current curve and signal level in operating mode 1
Fig. 10 Current curve and trigger voltage in operating mode 2
Parameterisation
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