Festo MSE6-E2M User manual

MSE6-E2M
Energy efficiency module
Operating instruc-
tion
8163321
2022-08d
[8163323]

Translation of the original instructions
EtherCAT®, EtherNet/IP®, PI PROFIBUS PROFINET® are registered trademarks of the respective trade-
mark owners in certain countries.

Festo — MSE6-E2M — 2022-08d
3
Table of contents
1 Applicable documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Intended use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Foreseeable misuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Training of qualified personnel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Additional information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1 Product design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2 Combination with MS6 modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Display components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1 Measurement functions and control function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.1 Flow rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.2 Consumption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1.3 Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.4 Pressure change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.5 Blocking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Input data and output data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2.2 Description of the input data and output data. . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2.3 Selectable input data function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.1 Pneumatic installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2 Electrical installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2.1 Connecting elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.1 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2 Commissioning the product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.3 Commissioning with bus node CPX-M-FB13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.3.1 Interfaces and display components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.3.2 Connecting to the network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.3.3 Bus terminal with terminating resistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.3.4 Setting DIL switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.3.5 Commissioning and configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.3.6 Faultless commissioning, normal operating status. . . . . . . . . . . . . . . . . . . . . . 42
8.4 Commissioning with bus node CPX-M-FB36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.4.1 Interfaces and display components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.4.2 Connecting to the network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8.4.3 Setting DIL switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.4.4 Commissioning and configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.4.5 Faultless commissioning, normal operating status. . . . . . . . . . . . . . . . . . . . . . 49

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Festo — MSE6-E2M — 2022-08d
8.5 Commissioning with bus node CPX-M-FB37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.6 Commissioning with bus nodes CPX(-M)-FB43/FB44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.6.1 Interfaces and display components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.6.2 Using the memory card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8.6.3 Connecting to the network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8.6.4 Setting DIL switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8.6.5 Commissioning and configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.6.6 Faultless commissioning, normal operating status. . . . . . . . . . . . . . . . . . . . . . 57
9Parameterisation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.1 Options for parameterisation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.2 Notes on parameterisation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.3 Overview of module parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.4 Modifiable module parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.5 Read-only module parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
9.6 Parameterisation examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
9.6.1 Automatic shut-off function example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
9.6.2 Example of pressure drop monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
9.6.3 Stand-alone mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
10 Malfunctions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
10.1 Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
10.1.1 Module common error LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
10.1.2 Diagnostics via status bits or the I/O diagnostic interface. . . . . . . . . . . . . . . . 74
10.2 Error numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
11 Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
12 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
12.1 Technical data, general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
12.2 Technical data, pneumatic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
12.3 Technical data, electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Festo — MSE6-E2M — 2022-08d
Safety
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1 Applicable documents
All available documents for the product è www.festo.com/sp.
Document Product Table of contents
Manual CPX-SYS system CPX system description
Operating instruction Bus node CPX-FB13 PROFIBUS-DP
Operating instruction Bus node CPX(-M)-43/44/45 PROFINET IO
Operating instruction Bus node CPX-FB36 EtherNet/IP
Operating instruction Bus node CPX-FB37 EtherCAT
Assembly instructions Wall mounting-SET MS6-WPG –
Tab. 1: Documentation on the product
2 Safety
2.1 Safety instructions
–Only use the product in its original condition without unauthorised modifications.
–Only use the product if it is in perfect technical condition.
–Observe the identifications on the product.
–Only use the product in an industrial environment.
–The product may generate high frequency interference, which may require interference suppression
measures in residential areas.
–Before working on the product, switch off the power supply and secure it against being switched on
again.
–When the input pressure is shut off, the functioning of the system means that a residual pressure of
< 0.1 MPa (1 bar; 14.5 psi) may remain at the output.
–Comply with the handling specifications for electrostatically sensitive devices.
–To exhaust the system: use shut-off valves in the compressed air supply line.
The product is equipped with a pneumatically-piloted shut-off valve. If there is pressure at pneumatic
connection 1, the shut-off valve is open in the normal position.
With preset parameters and applied input pressure P1 the shut-off valve automatically switches to the
pressurise state in the following cases:
–Switch-off of the operating voltage or the load voltage
–Interruption of the network communication with correspondingly set system parameters
–Stopping of the higher-order controller (see manufacturer's specifications), e.g. in the case of
transmission of control programs, parameters, configuration data
If the shut-off valve was previously closed and the system was exhausted, the system is suddenly
pressurised. Take this response into account in the design of the system.
2.2 Intended use
The energy efficiency module is used to monitor and optimise compressed air consumption.

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Festo — MSE6-E2M — 2022-08d
Additional information
2.3 Foreseeable misuse
The following are examples of foreseeable misuse and are not approved as intended use:
–Operation outdoors.
–Closure of exhaust ports.
–Shutting off a system as a safety function.
–Use in safety functions:
–The energy efficiency module must not be installed behind an exhaust valve that fulfills a safety
function. This can impair the safety functions installed in the system.
–If the energy efficiency module is installed in front of a safety valve, the design of the layout must
not impair the intended operation of the safety valve and of the system, possibly by installation
of additional safety measures.
2.4 Training of qualified personnel
Work on the product may only be carried out by qualified personnel who can evaluate the work and
detect dangers. The qualified personnel have skills and experience in dealing with electropneumatic
(open-loop) control technology.
3 Additional information
–Accessories è www.festo.com/catalogue.
–Spare parts è www.festo.com/spareparts.
–Information on the CPX field bus node è www.festo.com/sp.
–Information on the short documentation for the CPX-Extension è www.festo.com/sp.

Festo — MSE6-E2M — 2022-08d
Product overview
7
4 Product overview
4.1 Product design
1
2
3
4
6
7
5
8
9
Fig. 1: Product design, example
1
Pneumatic port 2: compressed air outlet
2
Sensor module
3
Shut-off valve
4
Bus node, here CPX-FB43
5
System supply
6
Earth terminal
7
Pneumatic port 1: compressed air inlet
8
Wall bracket
9
Module common error LED
The energy efficiency module consists of the following main components:
–Bus node
–Flow sensor
–Shut-off valve with pressure sensor
The power is supplied to the components by the system supply.

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Festo — MSE6-E2M — 2022-08d
Product overview
The bus node enables connection to a higher-level controller. The input data, output data, parameters
and diagnostic information are transmitted to the higher-level controller via the bus node.
Fixed module numbers are assigned to the energy efficiency module and the bus node.
MSE6-E2M-... Module number
Bus node CPX-FBxx 0
Energy efficiency module MSE6-E2M 1
Tab. 2: Module numbers
The energy efficiency module can be expanded on the left and right with service unit components from
the MS6 series è 4.2 Combination with MS6 modules.
4.2 Combination with MS6 modules
Additional service unit components from the MS6 series can be connected to the left and right of an
energy efficiency module.
General information
–Maximum permissible number of entire service unit component combination: 10 individual mod-
ules. The MSE6-D2M product counts as a double module.
–When supplementing MS6 modules, only use the wall mounting set MS6-WPG and the module
connector MS6-MV-EX.
–Observe the assembly instructions for the MS6-WPG wall mounting set.
–In the case of a larger device configuration, a longer FE joint is required.
–The cable has a nominal cross section of 5 mm2 with cable lug in accordance with DIN 46234-4-6.
–Alternatively: earthing straps are manufactured in a bare or tin-plated design in accordance with
DIN 46444 or in accordance with DIN 72333-3. Nominal cross section: > 5 mm2. Connection: M4.
Mounting
1. With pre-assembled MS6 combinations: replace the wall bracket with a wall mounting set
MS6-WPG.
2. With MS6 individual modules: replace standard module connectors with pre-assembled MS6
combinations with MS6-MV-EX module connectors.
3. For additions to the left side: remove the left-hand pneumatic connecting plate of the MS6 module
or MS6 module combination. At this point, install the left pneumatic connecting plate of the
product.
4. For additions to the right side: remove the right-hand pneumatic connecting plate base of the MS6
module or MS6 module combination. At this point, install the right pneumatic connecting plate of
the product.
Earth terminal
1. Connect the earth terminal on the pneumatic connecting plate with low impedance, short cable
with large cross-sectional area, to the end plate of the electrical linkage module of the product,
pre-assembled on delivery status, è Fig. 16.
2. The earth terminal at the left end plate of the electrical linkage of the product and the earth ter-
minal at the power supply connection must have the same potential. There must be no equalising
currents.

Festo — MSE6-E2M — 2022-08d
Functions
9
3. If necessary, replace the electrical connection pre-installed on the energy efficiency module with a
longer, electrically equivalent connection.
1
2 2 3
4
5675
Fig. 2: Power supply of the MSE6-E2M with MS6 modules
1
Equipotential bonding between the left
pneumatic connecting plate and the left
end plate
2
MS6 module
3
MSE6-E2M, grey background
4
System supply
5
Equipotential bonding of functional earth,
FE
6
External fuses
7
Separately switchable actuator power
supply
4.3 Display components
Module common error LED
The module common error LED is located on the top of the energy efficiency module. For more
information è 10.1.1 Module common error LED.
Status LED of the integrated bus node
The integrated bus node has various display elements.
For detailed information see the relevant description for the bus node è 1 Applicable documents.
5 Functions
Overview
–Control function, energy-efficiency function
–Automatic locking on flow underlining
–User-controlled shut-off and pressurisation

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Functions
–Recording and provision of measurement data
–Output pressure
–Pressure change, for leak testing
–Flow rate
–Air consumption
–Limit value monitoring
–Pressure, upper limit value
–Pressure change, upper limit value
–Flow rate, upper limit value
–Fieldbus connection
–PROFIBUS, CPX-FB13
–EtherNet/IP connection, CPX-FB36
–EtherCAT connection, CPX-FB37
–PROFINET connection, CPX-FB43 or CPX-FB44
Standby detection and automatic blocking of the compressed air supply
The energy efficiency module uses modifiable parameters to detect production downtime of a pneu-
matic system. The system is disconnected from the compressed air supply by the 2/2 shut-off valve,
without exhausting the downstream system. This avoids additional air consumption by leakages. If
production is to continue on the system, then it must be signaled to the energy efficiency module. The
shut-off valve opens and the system is again supplied with compressed air.
Automatic blocking of the compressed air supply can be activated and deactivated by the user. In both
states, the shut-off valve can be controlled directly by the PLC.
Testing pressure-tightness
When in the blocked state, the energy efficiency module measures the pressure curve over time.
Even in well-serviced systems, the pressure falls continuously due to leakages. The fewer leakages
the system has, the slower the pressure drop will be. The measured pressure change is indicative
of leakages in the system. If the parameterised limit value is exceeded, the device will output a
diagnostic message.
Pressure recording
The energy efficiency module continuously measures the output pressure, prepares the data and
makes it available cyclically. To detect operating pressures that are too high, the energy efficiency
module offers the option of parameterising critical limits for pressure. If the parameterised limit value
is exceeded, the energy efficiency module will output a diagnostic message.
Flow recording
The energy efficiency module continuously measures the flow rate, prepares the data and makes it
available cyclically. To detect excessive flow rates, the energy efficiency module offers the option of
parameterising the upper critical limit for the flow rate. If the parameterised limit value is exceeded,
the energy efficiency module will output a diagnostic message.
Consumption recording
The energy efficiency module determines the compressed air consumption by recording the system
flow rate. With the aid of output data, the consumption measurement can be switched on and off and
the consumption value can be reset.

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Functions
11
Operational functions
The response of the energy efficiency module can be influenced by accessing the internal parame-
ters, e.g.:
–Diagnostic behaviour by enabling maskable diagnostic messages.
–Specification of the units and the measuring interval.
–Setting of critical limits.
The energy efficiency module is delivered with preset parameters è 9 Parameterisation.
5.1 Measurement functions and control function
The following sections provide an overview of the individual measurement and control functions of the
energy efficiency module and describe the setting options and their influencing variables.
Individual functions and their behaviour can be controlled using the outputs and parameters. Meas-
urement and status signals are available as input values. The diagnostic information is made available
as a combination of the error number and their respective channel allocation.
For the following designations of inputs and outputs and parameters, m is the module number that is
based on the address position of the energy efficiency module in the overall CPX system and has the
fixed value m = 1.
5.1.1 Flow rate
Input signal
The measured flow rate is prepared according to the set parameters of flow rate, Pm.8.2-8.3, and unit
flow rate, Pm.8.6-8.7, processed and provided as input signal, Em.0.
Limit value monitoring
A comparator is used to compare the measured flow rate value with the upper flow rate limit value
parameter, Pm.11-12. When the time set in the monitor limit values startup, Pm.7, parameter has
elapsed and limit value monitoring is activated, Pm.0.6, the appropriate error/diagnostic message is
output if a limit value is exceeded.
Monitoring of parameters
The unit flow rate, Pm.8.2-8.3, standard flow rate, Pm.8.6-8.7, upper flow rate limit value, Pm.11-12,
limit value monitoring startup, Pm.7, parameters are checked for permissible values when input.
In case of error, the appropriate error message is output if parameterisation error monitoring is
activated, Pm.0.7.
Sensor monitoring
If there is a sensor error, the appropriate error message, which cannot be deactivated, is output.

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Festo — MSE6-E2M — 2022-08d
Functions
Unit
flow rate
Pm.8.2-8.3
Flow rate
standard
Pm.8.6-8.7
Upper
critical limit
flow rate
Pm.11-12
Monitoring
of
critical limit
startup
Pm.7
Monitoring
of
critical limits
Pm.0.6
Monitoring
of
parameter
Pm.0.7
Data
check
Scaling
Flow
rate
sensor
sensor
error
Data
check
Data
check
Data
check
Comparator
Diagnostics, maskable
FN25, Em.0: parameterisation error upp. critical limit
FN29, Em.0: error in parameterisation
Input
Em.0: flow rate
Diagnostics, maskable
FN10, Em.0: upp. critical limit exceeded
Diagnostics, not maskable
FN15, Em.0: sensor defective
Flow rate
Fig. 3: Block diagram of the flow rate function
5.1.2 Consumption
Input signal
The consumption value is based on the prepared measured flow value. The value is processed and
sent as input signal, Em.1, depending on the unit consumption, P8.4-8.5, and flow rate standard,
P8.6-8.7, parameters.
If there is a change to the unit flow rate or unit flow rate standard parameters, the measured
consumption value is reset to the value 0. If there is a change to the unit consumption parameter
value, the current measured consumption value is saved and is converted to the new consumption
unit.
Consumption measurement
Consumption measurement is controlled using two data bits in the output word Am.0. Consumption
measurement is started, continued or stopped with the consumption measurement control bit output,
Am.0.12. The consumption measured value can be reset to the value 0 with the reset consumption
measurement, Am.0.13, output.
Monitoring of parameters
The unit flow rate, P8.2-8.3, flow rate standard, P8.6-8.7, and unit consumption, P8.4-8.5, parameters
are checked at input for permissible values. In case of error, the appropriate error message is output if
parameterisation error monitoring is activated, P0.7.
Module number m = 1
Function number = 4828 + m * 64 + parameter number

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1 2 3 4 5 6
Fig. 4: Block diagram of the consumption function
1
Unit flow rate parameter
2
Flow rate standard parameter
3
Unit consumption parameter
4
Output control bit, reset consumption
measurement
5
Output control bit consumption measure-
ment
6
Parameterisation diagnostics errors param-
eter
5.1.3 Pressure
Input signal
The output pressure P2 measured value is processed according to the unit pressure, Pm.8.0-8.1,
parameter and made available as an input signal pressure P2, Em.2.
Monitoring of upper pressure critical limit
A comparator is used to compare the measured pressure value with the upper pressure limit value,
Pm.13-14, parameter. When the time set in the monitor limit values startup, Pm.7, parameter has
elapsed and limit value monitoring is activated, Pm.0.6, the appropriate error/diagnostic message is
output if a limit value is exceeded.
Monitoring of parameters
The unit pressure, Pm.8.0-8.1, upper pressure limit value (P13-14) and startup limit value diagnostics
(P7) parameters are checked for permissible values on input. In case of error, the appropriate error
message is output if parameterisation error monitoring is activated (P0.7).
Sensor monitoring
If there is a sensor error, the appropriate error message, which cannot be deactivated, is output.
Module number m = 1
Function number = 4828 + m * 64 + parameter number

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1 2 3 4 5
Fig. 5: Block diagram of the “Pressure” function
1
Unit pressure parameter
2
Upper limit pressure parameter
3
Diagnostics limit values startup parameter
4
Diagnostics limit values parameter
5
Parameterisation diagnostics errors param-
eter
5.1.4 Pressure change
5.1.4.1 Measurement method
The pressure change DP2 is determined cyclically at intervals of the parameterisable pressure change
sample time DT. When calculating the pressure change, the difference between the current measured
pressure value and the measured pressure value DT, based on the pressure change sample time P2, is
calculated: DP2 = P2(t) – P2(t-DT); t = current measuring point.
The start of the measuring cycle to calculate the pressure change is automatically synchronised with
the activation signal of the shut-off valve. The current pressure change value DP2 remains constant
up to the next measuring time. Every time the unit, Pm.8, parameter is written, a re-synchronisation
follows.
In the blocking state, the amount of the pressure change value is compared to the upper pressure
change critical limit DP2_OGR and monitored to determine whether the critical limit has been
exceeded. Once critical limit monitoring is activated, a diagnostic message is generated if the param-
eter ABS(DP2) is > DP2_OGR. Information on the resolution of the pressure measurement range
è 12.2 Technical data, pneumatic.

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DT synchronisation and DP2 OGR critical limit monitoring
The time diagrams show the DT synchronisation and DP2 OGR critical limit monitoring.
Pressure
P2
DT
t
0
DT DT DT DT DT
DP2
t
1 t 2 t 3 t 4 t 5 t 6 t 7 t
Blocking
DT synchronisation on
switching on the shut-off valve at t = t
4
0
Pressure
change
DP2
DP2 =
P2(t
1 )
- P2(t
0 )
DP2 =
P2(t
2 )
- P2(t
1 )DP2 =
P2(t
3 ) - P2(t 2 )DP2 =
P2(t
5 )
- P2(t
4 )
DP2 =
P2(t
6 )
- P2(t
5 )
t
DP2 =
P2(t
7 )
- P2(t
6 )
DP2 signal extension
for DT synchronisation from t = t
4
DP2_OGR
Amount
of
pressure
change:
ABS(DP2)
t
No ABS(DP2) calculation
Diagnostics
message
t
Upper critical limit
exceeded:
ABS(DP2) > DP2_OGR
Message
active
Fig. 6: DT synchronisation and DP2 OGR critical limit monitoring
5.1.4.2 Function structure
Input signal
The measured pressure change value DP2 is processed in accordance with the set unit pressure,
Pm.8.0-8.1, pressure change sample time, Pm.10, parameters and can be displayed as a selectable
input signal in Em.5.

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Limit value monitoring
If the shut-off valve is in the blocking state, the amount of the measured pressure change is compared
with the upper pressure change limit value, Pm.15-16, parameter using a comparator. If limit value
monitoring is activated, Pm.0.6, the appropriate error/diagnostic message is output if the limit value is
exceeded.
Monitoring of parameters
The unit pressure, Pm.8.0-8.1, pressure change sample time, Pm.10, and upper pressure change
limit value, Pm.15-16, are checked for permissible values on input. In the event of an error, the
corresponding error message is output if parameterisation error monitoring is activated, Pm.0.7.
1 2 3 4 5
Fig. 7: Block diagram of the pressure change function
1
Unit pressure parameter
2
Pressure change sample time parameter
3
Upper limit pressure change parameter
4
Diagnostics limit values parameter
5
Parameterisation diagnostics errors param-
eter
5.1.5 Blocking
5.1.5.1 User-controlled blocking
If the auto blocking control bit output, Am.0.1, is inactive, the shut-off valve can be controlled
directly with the blocking control bit output, Am.0.0. The pressurise control bit output, Am.0.2, has no
influence on the switching status of the shut-off valve.

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Fig. 8: Behaviour of user-controlled blocking
5.1.5.2 Automatically controlled blocking
If the shut-off valve is in the pressurise state, the auto-locking control bit output, Am.0.1, of the
measured flow rate is compared with the adjustable limit value in the auto-blocking flow rate limit
value, P19-20, parameter. If this limit value is not reached for the duration of the value set in the auto
blocking delay time parameter, P17-18, the shut-off valve will switch to the blocking state.
Fig. 9: Auto blocking function
The automatic blocking function is activated when the auto blocking control bit output, Am.0.1, is
activated and the blocking control bit output, Am.0.0, is inactive. In this state, the measured flow value
is compared with the limit value set in the auto blocking low flow limit parameter, P19-20. If the limit
value is undershot, the auto blocking timer is started.
The status of the timer is available in the auto blocking timer status bits input, Em.3.4-3.5, and can
have the following values:
RESET: the timer is reset and not started, the shut-off valve is in the pressurise state.
RUN: the timer has started, the delay time has not yet expired, the shut-off valve is in the pressurise
state.
UP: the delay time has expired, the shut-off valve is in the blocking state.

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Fig. 10: Behaviour of automatically-controlled blocking
5.1.5.3 Switch to the pressurise state
If the auto blocking timer has expired, status = UP, the blocked shut-off valve can only be switched to
the pressurise state under user control. There are the following options for switching:
–Edge-controlled: positive signal edge at the pressurise control bit output, Am.0.2. Detection of
a rising edge resets the timer to the RESET status once only. Automatically-controlled blocking
remains active.
–Level-controlled: deactivation of the auto blocking control bit output,Am.0.1. The timer remains in
the RESET status for as long as this output is deactivated. If the auto blocking control bit output is
reactivated, automatically-controlled blocking is active again.
When the timer is reset and the locking control bit output, Am.0.0, is deactivated, the shut-off valve
switches to the pressurise state.

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Fig. 11: Edge-controlled pressurisation
Fig. 12: Level-controlled pressurisation
5.1.5.4 Function structure
Controlling the shut-off valve
The shut-off valve can be controlled by the user or, if activated accordingly, automatically:
–If the auto blocking control bit output, Am.0.1, has been deactivated, the shut-off valve is switched
directly with the blocking control bit output, Am.0.0.
–when the output is activated, the shut-off valve switches to the blocking state.
–when the output is deactivated, the shut-off valve switches to the pressurise state.

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–When the auto blocking control bit output, Am.0.1, is activated and the blocking control bit output,
Am.0.0, is deactivated, the switching status of the shut-off valve is determined by the auto blocking
timer status bit inputs, Em.3.4-3.5, timer of the function for automatic blocking. After the expiry of
the parameterised delay time, auto blocking delay time, P17-18, the shut-off valve is automatically
switched to the blocking state.
–When the blocking control bit output, Am.0.0, is activated, the shut-off valve always switches to the
blocking state regardless of other signal states.
The switching status of the shut-off valve is signalled via the shut-off valve status bit input, Em.3.0,
and the number of valve switching cycles via the valve switching cycles parameter, P31-32.
Auto blocking timer
The status of the auto blocking timer is determined by the following input variables:
–If the parameterised auto blocking low flow limit value, P19-20, is not reached, a comparator
activates the auto blocking function.
–Activating the auto blocking control bit output, Am.0.1, activates the auto blocking function.
–The pressurise control bit output, Am.0.2, can be used to switch the shut-off valve back to the
pressurise state after an automatic blocking operation. Automatically controlled blocking remains
active.
The status of the auto blocking timer is signalled via the auto blocking timer status bits inputs,
Em.3.4-3.5.
Monitoring of parameters
The unit flow rate, P8.2-8.3, unit flow standard, P8.6-8.7, and auto blocking flow limit value, P19-20,
parameters are checked on input for permitted values. In case of error, the appropriate error message
is output if parameterisation error monitoring is activated, P0.7.
Module number m = 1
Function number = 4828 + m * 64 + parameter numbers