METAL WORK PNEUMATIC EB 80 Proportional Pressure Regulator User Manual

METAL WORK PNEUMATIC EB 80 Proportional Pressure Regulator

FEATURES

• Electrical connection: M12 8-pin connector.
• Preset pressure range 0.05-10 bar with possible full scale and minimum pressure regulation.
• 10-300 mbar adjustable dead band.
• Supply pressure: FS+ at least 1 bar, max 10 bar (if a regulated pressure of 10 bar is required, a supply pressure of 10.5 bar is allowed).
• 12-24 VDC power supply.
• IP65 index of protection.
• LED indicating pressure achieved and digital output active.
• Graphical display and keypad to display the pressure, unit of measurement and parameter setting.
• 0-10 VDC or 4-20 mA analog output signal.

SETTING

NB: parameter changes can also be effected through the software downloadable from the website www.metalwork.eu To connect the PC to Regtronic you can use the cable code W0970513019.

In the version with the display, Press OK and ESC together to access the setting menu.
Select the parameter using the arrow keys.
Press ESC to return to the previous page.

During setting, pressure regulation is NOT active.

DISPLAY

LANGUAGE

• Italiano
• English
• Deutsch
• Español
• Français

Select LANGUAGE using the arrow keys, then press OK.

Select the desired language using the arrow keys, then press OK.

UNIT OF MEAS
bar
psi
MPa

• Select UNIT OF MEAS. using the arrow keys, then press OK.
• Select the desired unit of measurement using the arrow keys, then press OK.

CONTRAST

• Manual display contrast adjustment
• Select CONTRAST using the arrow keys, then press OK.
• Select the value using the arrow keys, then press OK.
• Compensation as a function of temperature is automatic.

ORIENTATION
Allows you to rotate the display 180 °

• Select ORIENTAT.
• Press OK to rotate the display

SET UP

• INPUT
  • 0-10 VDC
  • 0-5 VDC
  • 4-20 mA
  • RS232
  • Keypad
• Select INPUT using the arrow keys, then press OK.
• Select the type of input using the arrow keys and then press OK.
• For the type of analog input (0-10 VDC / 0-5 VDC / 4-20 mA), use an appropriate analog signal.
• For the type of RS232 input, use the communication protocol described in chapter 7.
• For the type of keypad input, set the pressure value using the arrow keys. When you press the display buttons, the set pressure appears;
  when you release them, the preset pressure is displayed.

DEAD BAND
This indicates the pressure range in proximity to the set pressure, within which regulation is active. The deadband is + and – the set value.
It is advisable to enter low values, 10 or 15 mbar, only if high regulation accuracy is required. High accuracy involves more work for the
solenoid valves.

• Select DEADB using the arrow keys, then press OK.
• Enter the value using the arrow keys, then press OK.

FULL SCALE
This indicates the maximum preset pressure. The analog command is divided over the Full Scale. The analog output signal indicates that the preset pressure is 0-10 VDC for 0-10 bar.
Examples with maximum preset pressure 3, 5 and 10 bar

For optimal regulation, the feed pressure must be FS + 1 bar.

MINIMUM PRESSURE
Indicates the minimum regulated pressure with set 0VDC (4 mA). The value can be set between 0 and 50% of the Full Scale set. The reference set is divided between the Minimum Pressure value and the Full Scale value.The minimum value which can be set with Keyboard Set is the Minimum Pressure value.

PC ON
Enables serial transmission, irrespective of the type of input.

SPEED REGULATION CONTROL
Can be used to change the regulator response speed

ANALOGUE INPUT FILTER
The analogue input filter allows you to set an offset value on the analogue signal. Until the set value is reached, the pressure is kept at 0 and the PRESSURE LED light flashes. This makes it possible to filter any disturbances or small unwanted signals coming from analogue boards, which would cause small and continuous undesired pressure regulations.
The setting range is 0 to 30 and corresponds to an offsetting of 0 to 110 mbar, 0/110 mV, 4/4.25 mA. The default value is 8, corresponding to 40 mbar.

NOISE DAMPING – K FILTER
The K filter can be used to reduce/eliminate disturbances due to noisy analogue signals, which generate unwanted continuous regulation.
The filter is based on a moving average of the set value.
The setting range is 0 – deactivated – to 200.
The higher the value of the filter the more a delay of the pressure regulation is generated.

ZERO SETTING (TEMPERATURE COMPENSATION)
The instrument is calibrated at an ambient temperature of 20°C. The pressure value measured by the internal transducer can vary with the ambient temperature and it may be necessary to reset the reading.
The value read can be reset through the reset function.
The function is only active if the pressure displayed is less than 150 mbar.
Upon zero resetting, the temperature compensation activates and the consequent change in pressure is automatically compensated.

CAUTION: the resetting has an effect on the calibration of the instrument. Before making it, make sure the supply pressure has been removed and the output circuit is disconnected.

ALARM OF ANALOGUE OUT 4-20 mA
If enabled, disconnection of the connection generates an alarm (default OFF).

DIGITAL OUTPUT

Two digital outputs are available, one PNP and one NPN. They can be configured independently as normally open or normally closed. The P ON (P+) and P OFF (P-) activation/deactivation thresholds are unique.

PRESSURE SWITCH CONFIGURATION (P)

• Select OUTPUT using the arrow keys, then press OK.
• Select CONFIGUR. to select the operating mode, then press OK.
• Select PRESSURE SWITCH, then press OK. PRESSURE SWITCH mode, shown with CONFIGUR. P. has been selected.
• Use the arrow keys to select PRESSURE SWITCH and press OK.
• Select P ON and press OK. Enter the desired activation pressure and press OK.
• Select P OFF and press OK. Enter the desired deactivation pressure and press OK.
• Press ESC to exit the menu.

SET (S) REFERENCE
This function can be used to make a “variable” setting for the pressure switch.
Out is activated when the preset pressure is reached, with a tolerance defined by P+ and P-.

• Select OUTPUT using the arrow keys, then press OK.
• Select CONFIGUR. to select the operating mode, then press OK.
• Select SET. REF and press OK. SET REFERENCE mode, shown with CONFIGUR. S. has been selected.
• Use the arrow keys to select PRESSURE SWITCH and press OK.
• Select SET.REF and press OK.
• Select P+ and press OK.
• Enter the upper tolerance pressure and press OK.
• Select P- and press OK. Enter the lower tolerance pressure and press OK.
• Press ESC to exit the menu.

TYPE OF CONTACT
This function is used to identify whether the digital output is normally open or normally closed.

• Select TYPE OF CONTACT and click OK.
• Select TYPE PNP or TYPE NPN, click OK and enter the type of contact.
• Click ESC to exit.

DEBUG

Utility used for checking correct operation of the two solenoid valves.

• Select DEBUG and press OK.
• Select PIN and press OK. The in solenoid valve activates and the pressure increases.
• Press OK. The in solenoid valve deactivates and pressure stabilizes.
• Select POUT and press OK. The out solenoid valve activates and pressure decreases.
• Press OK, the out solenoid valve deactivates and pressure stabilizes.

PASSWORD

This is a three-digit code used to protect the set configuration.

• Select SET PASSWORD with the arrow keys and click OK. On the setting page, use the arrow keys to enter the desired value and click OK to confirm. The system then displays the confirmation message “PASSWORD SAVED”.
• Select PASSWORD and click OK to enable/disable the function. If the password set to ON, it prevents access to the configuration menu. When you press OK+ESC together to access the configuration menu, you are prompted to enter the password.
  Enter the saved password. You can use the arrow keys to change the value or click OK to change the field.
  If the password is set to OFF, it is not enabled.
  If you forget the password, contact the manufacturer to obtain a password reset code.

ACCESS TO THE MENU

• Press OK to display the set parameters.
• Press OK and ESC together to access the parameter setting menu.
• Use the up and down arrows to scroll through the menu and modify the parameters.

TECHNICAL DATA

* IMPORTANT! Voltage greater than 32VDC will damage the system irreparably.

INSTALLATION AND OPERATION

PNEUMATIC CONNECTION

Pneumatic connection is via the Compressed air supply – P module.
It is important for the regulator pressure not to exceed 10 bar (10.5 bar ifa regulated pressure of 10 bar is required) and the compressed air to be filtered at 10 µm and dried, to prevent impurities or excessive condensate from causing a malfunction.
The supply pressure must always be higher than the preset pressure.
The regulator pressure must be at least 1 bar higher than the full scale value.
If a silencer is mounted on the outlet, the flow rates and response times may vary. Check the silencer periodically for clogging and replace if necessary.

ELECTRICAL CONNECTION

This is by means of M12 female circular 8-pin connector (to be ordered separately).
Refer to the wiring diagram below.
Wrong connections may permanently damage the regulator.

CONNECTOR PIN CONFIGURATION

• 1 = TX (RS232) (WHITE)
• 2 = RX (RS232) (BROWN)
• 3 = set 0-10 VDC / 0-5 VDC / 4-20 mA (GREEN)
• 4 = digital out 0-24 VDC NPN (YELLOW)
• 5 = analog out (GREY)
• 6 = digital out 0-24 VDC PNP (PINK)
• 7 = 0 VDC (GND) (BLUE)
• 8 = power supply 12-24 VDC (RED)
  colours’ sequence in compliance with Metal Work prewired connectors.

Regulator connector viewed from above

DIGITAL OUT CONNECTION

OPERATING PRINCIPLE

Using a software algorythm, the control circuit compares the input signal with the output pressure measured by the pressure sensor. When there is a change, it activates the inlet and outlet solenoid valves to re-establish an equilibrium. This gives an output pressure that is proportional to the input signal.

N.B.: removing the power supply, the outlet pressure doesn’t get discharged

FUNCTION DIAGRAM

TROUBLESHOOTING

LIST OF ALLARMS

SERIAL COMMUNICATION PROTOCOL

Communication protocol can be used to configure and control the regulator via an PC serial port. To activate serial communication, set the RS232 to ON on the set-up page.
The communication protocol is 2400 8 N 1 (8 bits, no parity, 1 stop bit) and the commands are in ASCII format.
All commands are the following type:

ESCcnnnnn
Where ESC (Escape) prepares the unit to receive commands, c is the command and nnnnn is the associated parameter, the length of which depends on the actual command.
For example, the control to regulate the pressure to 1 bar must be ESCP01000, which in ASCII-HEX becomes 1B503031303030.
The available controls are shown herewith below.

• Set Unit of measurement
  Sets the unit of measurement. The command is the following type:

ESCcn

• Where n =
• 0 = pressure in bar
• 1 = pressure in MPa
• 2 = pressure in psi

If n is not one of these values, the unit does not change.

• Set type of input
  Sets the type of control. The command is the following type:

ESCdn

• Where n =
• 0 = 0-10 VDC input
• 1 = 0-5 VDC input
• 2 = 4-20 mA input
• 3 = keypad input
• 4 = serial input

If n is not one of these values, the type of control does not change

• Set Deadband
  Sets the deadband. The command is the following type:

• ESCbnnn
  Parameter nnn must always be 3 digits. The value must be expressed in mbar.

• Set Full Scale
  Sets the full scale. The command is the following type:

ESCEnnnnn
Parameter nnnnn must always be 5 digits. The value must be expressed in mbar (e.g. ESCE7000, the set full scale is 7000 mbar)

• Minimum pressure set
  Set the minimum regulated pressure with set 0.
  The maximum value which can be set is the 50% of the FS. The control is type:

ESCennnnn
The parameter nnnnn must be always defined on 5 figures. The value must be expressed in mbar (For example, ESCe01000, the minimum pressure is set at 1000 mbar)

Digital output configuration
Sets the type of digital output and the activation/deactivation values. The command is the following type:

ESCO1sssssxxxxx
Where:
1 = type of output (0 = pressure switch 1 = reference)
sssss = output activation threshold
xxxxx = output deactivation threshold
Parameters s and x must always be 5 digits. The value must be expressed in mbar.

Set Pressure
Sets the pressure to reach. The command is the following type:

ESCPnnnnn
Parameter nnnnn must always be 5 digits. The value must be expressed in mbar (e.g. ESCP01001, the set pressure is 1001 mbar)

• Read preset pressure
  Displays the preset pressure value. This command requires no parameters. It is the following type:

ESCp
The response is:
ESCpnnnnn
Parameter nnnnn represents the pressure in mbar (e.g. ESCp05600, the preset pressure is 5.60 bar)

• Read type of regulator It is the following type:

ESC &
The expected response is: ESC&n

• Analogue OUT 4-20 mA alarm enable It is the following type:

ESCt
The expected response is:
ESCtn (0 = deactivated; 1 = active)

• Read configuration
  Displays a string with complete module configuration. This command requires no parameters. It is the following type:

ESCi
The expected response is:
ESCi05322b050c0d2E10000O10500002000e01000&0t0

Where:
05322 = the pressure reading
050 = the deadband (b = the set deadband code)
0 = the unit of measurement (c = the set unit of measurement code)
2 = type of control (d = the set type of control code)
10000 = the full scale (E = the code)
1 = type of output (0 = pressure switch 1 = reference) (O = the code) 05000 = output activation threshold
02000 = output deactivation threshold
01000 = minimum pressure
0 = type of regulator
0 = alarm analogue OUT 4-20 mA enable

The type of parameter is indicated before the value, except for pressure.

SERIAL CABLE CONNECTION DIAGRAM

LED INTERFACE

www.metalwork.eu

References

• Metal Work S.p.A.

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