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OM11 - EPI
DeviceNet interface
2
Installation & Maintenance Instructions
6.2.1 Positioning algorithm
A positioning algorithm (position closed loop control) is implemented on the DeviceNet interface
module.
The positioning function consists of comparing the position, received from the base card, with the
position request received from bus. If the difference between 'position request and present position'
is greater than 'Dead Band' an Open or a Close command is send to base card. The dead Band is
configurable via bus from 0.3 to 2.0%.
6.3 Fail Safe data
The Fail Safe data parameter defines the behavior of the actuator in case of network communication failure. The Fail Safe data parameter can be
modified via DeviceNet network.
Indication
Description
Parameter 1: Class 100; Instance 1; Attribute 100
Safety action
The action to execute in case of loss of bus communication.
0= No action
1= Stop
2= Close
3= Open
4= Go to predefined position
Parameter 2: Class 100; Instance 1; Attribute 101
Predef. safety position
Safe predefined position
Parameter 3: Class 100; Instance 1; Attribute 102
Delay on bus fail
Delay before to initiate the Safety Action
6.4 Dead Band configuration
The Dead Band indicates the maximum allowed deviation from the valve position and the requested position. If the deviation is bigger, an open or close
control command will be generated.
Indication
Description
Parameter 4: Class 100; Instance 1; Attribute 103
Dead Band
This parameter defines the Dead Band of the positioning
function available on the modulating actuator (in tenth of %).
The movement is inhibited until the difference between current
position and requested position (position error) is lower
than Dead Band.
6.5 User defined data
The User defined data is stored in the EPI
Indication
Description
Parameter 5: Class 100; Instance 1; Attribute 104
Actuator serial number Actuator serial number
Parameter 6: Class 100; Instance 1; Attribute 105
Actuator type
Actuator type
Parameter 7: Class 100; Instance 1; Attribute 106
Valve tag
Valve tag
6.6 Configuration data
The Configuration data is received from the base card via the internal data bus and is reported to the DeviceNet network. The Configuration data can
also be modified via the DeviceNet network and the interface will send the new values to the logic board.
Indication
Description
Parameter 8: Class 100; Instance 1; Attribute 112
Close direction
The direction the actuator drives the motor when it receives
a Close command.
0= Clockwise (CW)
1= Clockwise (CCW)
Parameter 9: Class 100; Instance 1; Attribute 113
Opening speed set
It defines the speed of the motor when opening.
Parameter 10: Class 100; Instance 1; Attribute 114
Closing speed set
It defines the speed of the motor when closing.
Parameter 11: Class 100; Instance 1; Attribute 115
Opening torque set
Opening torque.
Parameter 12: Class 100; Instance 1; Attribute 116
Closing torque set
Closing torque.
Pentair reserves the right to change the contents without notice
actuator and is available on the DeviceNet network for Asset Management information.
2
Direction
Data Type
Range
R/W
Integer
0-4
R/W
Integer
0-100
R/W
Integer
0-10
Direction
Data Type
Range
R/W
Integer
3- 20
Direction
Data Type
Range
Only read
Short string 12 bytes
Only read
Short string 12 bytes
Only read
Short string 12 bytes
Direction
Data Type
Range
R/W
Integer
0-1
R/W
Integer
0-9
R/W
Integer
0-9
R/W
Integer
0-9
R/W
Integer
0-9
page 6
Default
E.U.
0
-
50
%
4
sec
Default
E.U.
15
0.1%
Default
E.U.
-
-
-
-
-
-
Default
E.U.
1
-
7
-
7
-
7
-
7
-
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