Festo MSE6-C2M User manual

MSE6-C2M
Energy efficiency module
Operating instruc-
tion
8163303
2022-08b
[8163305]

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-C2M — 2022-08b
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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 Electrical system extension CPX-Extension. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Combination with MS6 modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.4 Display components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 Measurement functions and control function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.1 Flow rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.2 Consumption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.3 Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.4 Pressure change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.5 Pressure regulation and blocking function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.6 Electrical inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1.7 Electrical outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2 Input/output data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2.2 Description of the input data and output data. . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.3 Selectable input data function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.1 Pneumatic installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.2 Electrical installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.2.1 Connecting elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.1 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.2 Commissioning the product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.3 Commissioning with bus node CPX-M-FB36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8.3.1 Interfaces and display components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8.3.2 Connecting to the network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8.3.3 Setting DIL switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.3.4 Commissioning and configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8.3.5 Faultless commissioning, normal operating status. . . . . . . . . . . . . . . . . . . . . . 58
8.4 Commissioning with bus node CPX-M-FB37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.5 Commissioning with bus nodes CPX(-M)-FB43/FB44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.5.1 Interfaces and display components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.5.2 Using the memory card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

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8.5.3 Connecting to the network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.5.4 Setting DIL switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
8.5.5 Commissioning and configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.5.6 Faultless commissioning, normal operating status. . . . . . . . . . . . . . . . . . . . . . 65
9 Parameterisation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
9.1 Options for parameterisation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
9.2 Notes on parameterisation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9.3 Overview of module parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.4 Modifiable module parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
9.5 Read-only module parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
9.6 Parameterisation examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
9.6.1 Automatic shut-off function example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
9.6.2 Example of pressure drop monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
10 Malfunctions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
10.1 Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
10.2 Error numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
11 Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
12 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
12.1 Technical data, general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
12.2 Technical data, pneumatic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
12.3 Technical data, electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

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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(-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
2Safety
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 operate the product with a silencer.
–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 by adjust-
able outlet pressures.

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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.
–Use of the integrated shut-off valve in continuous switching operation for pneumatic components.
–Use of the integrated pressure regulator in operation with continuous changes of setpoint pressure.
–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.
3Additional 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.

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Product overview
7
4 Product overview
4.1 Product design
1
2
3
4
5
67
8
9
10
11
13
12
Fig. 1: Product design, example MSE6-C2M-5000-FB44-DM-RG-BAR-AMI-AGD
1
Pneumatic port 2: compressed air outlet
2
Pressure gauge
3
Shut-off valve with pressure sensor
4
Pneumatic port 3: exhaust
5
Electrical system supply
6
Electrical connection: inputs
7
Electrical connection: outputs
8
MSE6-C2M-...-M only: CPX-Extension series
1 connection
9
Bus node, here CPX-M-FB44
10
Status LEDs
11
Proportional-pressure regulator
12
Pneumatic port 1: compressed air inlet
13
Flow sensor
The energy efficiency module consists of the following main components:
–Bus node
–Flow sensor

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Product overview
–Proportional-pressure regulator
–Shut-off valve with pressure sensor
The power is supplied to the components by the system supply.
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-C2M-... as a single device Module number
Energy efficiency module MSE6-C2M 0
Bus node CPX-FBxx 1
Tab. 2: Module numbers without electrical system extension
The energy efficiency module can be expanded on the left and right with service unit components from
the MS6 series è 4.3 Combination with MS6 modules.
The CPX extension series 1 connection of the MSE6-C2M-...-M enables extension of the electrical
system è 4.2 Electrical system extension CPX-Extension.
4.2 Electrical system extension CPX-Extension
The product variant MSE6-C2M-…-M enables connection of the following devices with a CPX extension
series 2 interface via the CPX-Extension series 1 interface:
–1 energy efficiency module MSE6-D2M or
–up to a maximum of 3 digital and/or analogue CPX input and output modules
The modules connected to the CPX-Extension series 1 interface form an overall system with the
MSE6-C2M-...-M and have a consecutive module number, starting with module number 2.
Electrical system extension with MSE6-D2M
The figure below shows the communication paths for a system extension with MSE6-D2M.

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Product overview
9
1 2 3 4 5
Fig. 2: System configuration with MSE6-C2M-...-M and MSE6-D2M
1
Controller board or network scanner/bus
master
2
User program in the machine controller
3
Network-specific configurator
4
Energy efficiency module MSE6-C2M-...-M
5
Energy efficiency module MSE6-D2M
MSE6-C2M-...-M with MSE6-D2M Module number
Energy efficiency module MSE6-C2M 0
Bus node CPX-FBxx 1
CPX-Extension series 2
–Energy efficiency module MSE6-D2M
2
Tab. 3: Module numbers for system extension

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Product overview
Electrical system extension with CPX I/O modules
The following CPX I/O modules are approved for extension:
–CPX-4DE, 4 digital inputs
–CPX-8DE, 8 digital inputs
–CPX-4DA, 4 digital outputs
–CPX-8DA, 8 digital outputs
–CPX-8DE/8DA, 8 digital inputs and 8 digital outputs
–CPX-4AE-U-I, 4 analogue inputs
–CPX-2AA-U-I, 2 analogue outputs
A system extension with electrical outputs requires a CPX interlinking block with infeed because the
load voltage is not forwarded via a CPX-Extension.
The figure below shows the communication paths for a system extension with CPX I/O modules:
1 2 3 4 5
Fig. 3: System configuration with MSE6-C2M-...-M and 3 CPX I/O modules, maximum configuration
1
Controller board or network scanner/bus
master
2
User program in the machine controller
3
Network-specific configurator
4
Energy efficiency module MSE6-C2M-...-M
5
CPX I/O modules with CPX-Extension series
2 connection

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Product overview
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MSE6-C2M-...-M with CPX I/O modules Module number
Energy efficiency module MSE6-C2M 0
Bus node CPX-FBxx 1
CPX-Extension series 2
–first CPX I/O module
2
–second CPX I/O module 3
–third CPX I/O module 4
Tab. 4: Module numbers for system extension
4.3 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-C2M product counts as a triple module here.
–When supplementing MS6 modules, only use the wall mounting set MS6-WPG and the module
connector MS6-MV-EX.
–When supplementing MS6 modules, the screws on the module connector between the flow sensor,
proportional-pressure regulator and the shut-off valve may not be loosened è Restriction of EMC
immunity to interference.
–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 7.2 Electrical installation.

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Product overview
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.
3. If necessary, replace the electrical connection pre-installed on the energy efficiency module with a
longer, electrically equivalent connection.
4.4 Display components
Status LEDs of the energy efficiency module
1 2
3
4
Fig. 4: Status LEDs of the energy efficiency
module
1
LED P2, output pressure status
2
Module error LED
3
LED DO0 and DO1, status LEDs outputs
4
LED DI0 and DI1, status LEDs inputs
LED Meaning
P2 (green)
LED on Outlet pressure p2 ³ lower critical limit pressure p2
LED flashes Outlet pressure p2 < lower critical limit pressure p2 and
Output pressure p2 ³ auto standby pressure setpoint value –
0.05 MPa (0.5 bar; 7.25 psi)
LED is off Output pressure p2 < auto standby pressure setpoint value –
0.05 MPa (0.5 bar; 7.25 psi)
DI0 and DI1, green
LED on Signal at electrical input 0 or 1 is pending, logic 1
LED is off Signal at electrical input 0 or 1 is not pending, logic 0

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Functions
13
LED Meaning
DO0 and DI1 (yellow)
LED on Electrical output 0 or 1 sends 1-signal, logic 1
LED is off Electrical output 0 or 1 sends 0-signal, logic 0
P red
LED on Module error
LED is off No module error
Tab. 5: Status indicator LEDs
Status LED of the integrated bus node
For detailed information on the display elements of the bus node, see the associated description è 1
Applicable documents.
Display of outlet pressure p2
Red/green pressure gauge
5Functions
Overview
–Pressure control function and lock function, energy efficiency function
–automatic blocking and subsequent regulation to the standby target pressure with a prolonged
reduced flow rate
–user-controlled blocking and pressure regulation
–parameterisable target pressure rise limitation, soft-start
–Recording and processing of measurement data
–Outlet pressure P2
–Pressure change for leak testing
–Flow rate
–Air consumption
–Limit value monitoring
–Pressure, lower and upper critical limit
–Pressure change, upper limit value
–Flow rate, upper limit value
–Electrical I/Os
–2 digital inputs
–2 digital outputs

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Functions
–Channel-based status indicator via LED
–Parameterisable special functions
–Fieldbus connection
–EtherNet/IP connection, CPX-FB36
–EtherCAT connection, CPX-FB37
–PROFINET connection, CPX-FB43 or CPX-FB44
Standby detection and automatic pressure reduction
The energy efficiency module detects downtime of a pneumatic system when correspondingly parame-
terised. If the parameterised flow rate limit value is continuously undershot during the parameterised
delay period, when the automatic function is activated, controller auto-user and controller auto-enable
logic 1, the supply air is blocked until the parameterised standby setpoint pressure value is reached.
The output pressure is then adjusted to this value. This prevents unnecessary exhausting of the
system and enables leakage detection via an analysis of the pressure drop. A control signal can
be used to switch back over from standby pressure regulation to normal pressure regulation. When
the automatic function is deactivated, the shut-off valve and the pressure regulator can be directly
controlled by the machine controller.
Regulation of the compressed air supply
The energy efficiency module regulates the compressed air supply to the set pressure setpoint value.
This can be done in manual mode by the setting from the controller. In automatic mode, regulation it is
regulated by the parameterised target pressure values.
Testing pressure-tightness
The energy efficiency module continuously measures the pressure change in the parameterised time
interval and monitors this value to ensure it is not exceeded in the blocking status. The measured
pressure change serves as a measure of the leakage existing in the downstream system.
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 or too low, 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.
The status of monitoring to ensure the critical limit is not exceeded is indicated via an input bit and via
the P2 LED on the module.
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
15
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 = 0.
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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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. 5: Block diagram of the flow rate function
5.1.2 Consumption
Input signals
The consumption measurement is based on the prepared flow rate value. Depending on the unit
consumption, Pm.8.4-8.5, and standard flow rate, Pm.8.6-8.7, parameters, the consumption values
are processed in 2 independent channels and provided as input signals in the 16-bit and 32-bit data
format:
–Consumption V0, 16 bit: input Em.1 and selectable inputs Em.5 and/or Em.6
–Consumption V0, 32 bit: selectable inputs Em.5-6
–Consumption V1, 16 bit: selectable inputs Em.5 and/or Em.6
–Consumption V1, 32 bit: selectable inputs Em.5-6
There is also a continuous consumption measurement which, after a certain, unit-dependent con-
sumption, generates a logic one measurement impulse with a duration of 100 ms. For the consump-
tion units l and m³, the consumption value is 200 l. For the consumption unit scf, the consumption
value is 10 scf.
The measuring pulse is provided at the measuring pulse consumption VC, Em.3.7, input. In addition,
the signal is output at electrical output 0 if the selection DO0 signal parameter has the value
Pm.28.3 = 1.
If there is a change to the unit flow rate or standard flow rate parameter values, the measured
consumption values are reset to the value 0.
If there is a change to the unit consumption parameter value, the current measured consumption
values are saved and converted to the new consumption unit.
User-controlled consumption measurement
The 2-channel consumption measurement is controlled using two data bits in the output word for
module control, Am.0. The respective consumption measurement is started, continued or stopped
with the consumption V0 Run, Am.0.12, or consumption V1 Run, Am.0.14, outputs. The respective
consumption measurement values can be reset to the value 0 via the consumption V0 Reset, Am.0.13,
or consumption V1 Reset, Am.0.15, outputs.

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17
Monitoring of parameters
The unit flow rate, Pm.8.2-8.3, standard unit flow rate, Pm.8.6-8.7, and unit consumption, Pm.8.4-8.5,
parameters are checked on input for permitted values. In the event of an error, the corresponding error
message is output if parameterisation error monitoring is activated, Pm.0.7.
Unit
flow rate
Pm.8.2-8.3
Flow rate
standard
Pm.8.6-8.7
Unit
consumption
Pm.8.4-8.5
Consumption
V0
Run
Am.0.12
Monitoring
of
parameter
Pm.0.7
Data check
Scaling
Data check Data check
Diagnostics, maskable
FN29, Em.0:
error in parameterisation
Inputs
Em.1: consumption V0 (16 Bit)
Em.3.12: status measurement consumption 0
Em.3.13: status measurement consumption 1
Consumption
Consumption
V0
Reset
Am.0.13
Consumption
V1
Run
Am.0.14
Consumption
V1
Reset
Am.0.15
Reset
consumption
V0
User-controlled
consumption measurement
V0 and V1
Run / Stop
consumption
V0
Run / Stop
consumption
V1
Reset
consumption
V1
Selectable inputs
Em.5-6: consumption V0 (16/ 32 bit)
consumption V1 (16/ 32 bit)
Diagnostics, maskable
FN29, Em.1:
error in parameterisation
Continuous
consumption measurement
VC
Consumption
measurement
impulse
Input:
Em.3.7: measurement impulse consumption VC
Electrical
output
VC
Sensor
error
flow
rate
sensor
Fig. 6: Block diagram of the consumption function
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 lower pressure critical limit P2 and status indicator
A comparator is used to compare the measured pressure value with the parameter “Lower pressure
critical limit” P2. The result is indicated in two ways.
• Status LED P2
–The LED lights: output pressure P2 ³ lower pressure limit value P2
–The LED flashes: output pressure P2 < lower pressure limit value P2 and
output pressure P2 ³ auto standby pressure setpoint value - 0.05 MPa (- 0.5 bar; - 7.25 psi).
The condition is not applicable if:
The lower pressure limit value P2 < auto standby pressure setpoint value - 0.05 MPa (- 0.5 bar;
- 7.25 psi).
–The LED is off: output pressure P2 < auto standby pressure setpoint value - 0.05 MPa (- 0.5 bar;
- 7.25 psi).
•Input monitoring lower pressure limit value P2, Em.3.6
–Logic 1: outlet pressure P2 < lower critical limit pressure P2
–Logic 0: outlet pressure P2 ³ lower critical limit pressure P2

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Functions
The figures show the behaviour of the status LED P2 and the input signal Monitoring of lower critical
limit pressure P2 for the two parameterisation cases:
–Case 1: lower pressure limit value P2 > auto standby pressure setpoint value - 0.05 MPa (- 0.5 bar;
- 7.25 psi).
–Case 2: lower pressure limit value P2 < auto standby pressure setpoint value - 0.05 MPa (- 0.5 bar;
- 7.25 psi).
Em.2:
pressure P2
Pm.25-26:
lower critical limit pressure P2
Status LED P2 LED P2 not
illuminated
t
LED P2 illuminated
1
Em.3.6:
monitoring of
lower critical limit pressure
P2
0
Pm.23-24 – 0.5 bar:
pressure setpoint auto standby
– 0.5 bar
LED P2 flashes
Fig. 7: Monitoring of lower pressure limit value P2 and status indicator, case 1
Em.2:
pressure P2
Pm.25-26:
lower critical limit pressure P2
Status LED P2 LED P2 not
illuminated
t
LED P2 illuminated
1
Em.3.6:
monitoring of
lower critical limit pressure P2
0
Pm.23-24 – 0.5 bar:
pressure setpoint
auto standby – 0.5 bar
Fig. 8: Monitoring of lower pressure limit value P2 and status indicator, case 2

Festo — MSE6-C2M — 2022-08b
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19
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, lower pressure limit value P2, Pm.25-26, upper pressure limit value,
Pm.13-14, limit value monitoring startup, Pm.0.7, parameters are check 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.
Sensor monitoring
If there is a sensor error, the appropriate error message, which cannot be deactivated, is output.
Unit
pressure
Pm.8.0-8.1
Upper
critical limit
pressure
Pm.13-14
Monitoring
of
critical limit
startup
Pm.7
Monitoring
of
critical limits
Pm.0.6
Monitoring
of
parameter
Pm.0.7
Data
check
Data
check
Data
check
Comparator
Diagnostics, maskable
FN24, Em.2: parameterisation error low. critical limit
FN25, Em.2: parameterisation error upp. critical limit
FN29, Em.2: error in parameterisation
Input
Em.2: pressure P2
Diagnostics, maskable
FN10, Em.2: upp. critical limit exceeded
Diagnostics, not maskable
FN15, Em.2: sensor defective
Pressure P2
(MSE6-D2M)
Scaling
Status LED P2
Lower
critical limit
pressure
P2
Pm.25-26
Comparator
Data
check
Input
Em.3.6: status monitoring P2_UGR
P2
pressure
sensor
sensor
error
Fig. 9: Block diagram of the “Pressure” function
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.

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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.
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. 10: DT synchronisation and DP2 OGR critical limit monitoring