Page 1
S70 DeviceNet Servo
Installation & Maintenance Manual
Version 11
BRAY CONTROLS
13333 Westland East Blvd.
Houston, TX 77041 USA
(281) 894-5454
FAX (281) 890-1100
Page 2
S70 DeviceNet Servo Installation & Maintenance Manual
1. INTRODUCTION ............................................................................................................................... 2
2. HARDWARE DESCRIPTION .......................................................................................................... 3
2.1 HARDWARE FEATURES................................................................................................................ 4
2.2 CONNECTOR WIRING .................................................................................................................. 4
2.2.1 S70 Actuator Motor Connector ............................................................................................. 4
2.2.3 DeviceNet Connector J7 ....................................................................................................... 5
2.2.4 Feedback Pot J4 .................................................................................................................... 5
2.2.5 Calibration Button ................................................................................................................ 6
2.3 NORMAL OPERATION .................................................................................................................. 6
2.4 CALIBRATION ............................................................................................................................... 6
2.5 AUTO CALIBRATION .................................................................................................................... 7
5. THE ACTUATOR IS UNABLE TO REACH EITHER THE OPENED OR CLOSED LIMIT
SWITCH WITHIN 45 SECONDS............................................................................................................. 7
3. DEVICENET INTERFACE .............................................................................................................. 8
3.1 DEVICENET NETWORK ............................................................................................................... 8
3.1.1 Network connections, terminations, power, and limits ......................................................... 8
3.1.2 Network Grounding and Isolation ...................................................................................... 10
3.1.3 Network Power .................................................................................................................... 11
3.1.4 Network Status LED ............................................................................................................ 13
3.1.5 Commissioning .................................................................................................................... 13
3.1.6 Supported Attributes ........................................................................................................... 14
3.2 CONFIGURATION........................................................................................................................ 15
3.3 COMMUNICATION ...................................................................................................................... 16
3.3.1 Polled Message Connection ................................................................................................ 16
3.3.2 Explicit Message Connection .............................................................................................. 16
3.4 EDS (ELECTRONIC DATA SHEET) ............................................................................................ 16
4. TROUBLE SHOOTING .................................................................................................................. 21
4.1 CALIBRATION ............................................................................................................................. 21
4.2 ACTUATOR OPERATION ............................................................................................................ 22
4.3 DEVICENET NETWORK ERRORS .............................................................................................. 23
2000 BRAY CONTROLS Page 1 of 24
Page 3
S70 DeviceNet Servo Installation & Maintenance Manual
1. Introduction
The Bray S70 DeviceNet Servo is an ODVA (Open DeviceNet Vendor Association) certified
DeviceNet product that provides complete control and monitoring of the Bray S70 Electric Valve
Actuator. The basic function of the S70 DeviceNet Servo is to position the S70 Actuator in
response to commands from the process controller. The process controller contains a desired
process setpoint entered by the user, and continually monitors the process variable (i.e. flow
rate, tank level, etc.) through some form of sensor. Varying commands to the S70 DeviceNet
servo will change the S70 Actuator position, which in turn moves the underlying control valve to
create a change in the process variable. The process controller calculates and transmits the
appropriate commands to the S70 DeviceNet Servo in order to establish and maintain the
desired process setpoint.
The S70 DeviceNet Servo takes advantage of the industry standard DeviceNet network with
features and benefits that greatly enhance the operation of the S70 Actuator, such as:
Reduced hardwiring to simplify product installation.
Built-in product diagnostics for enhanced reliability.
Online user configurable settings for complete remote operation.
An EDS (Electronic Data Sheet) to simplify configuration.
Real-time reporting of critical information such as valve position, motor temperature, and
motor current to ensure reliable operation.
Automated Microprocessor calibration eliminates potentiometer settings and simplifies
commissioning.
Fully programmable DeviceNet Baud rate and MacID eliminating switch settings.
Certified by the ODVA as fully DeviceNet compliant, ensuring reliable operation with any
other DeviceNet product.
This document is organized into three main sections:
S70 Hardware, which includes installation and operation
DeviceNet Interface including communication, configuration, and a brief overview of the
DeviceNet network
Troubleshooting Guide
Refer to the S70 Hardware Section (0) for information on wiring and connections to the S70,
jumper settings, LED functions, and troubleshooting.
Refer to the DeviceNet Interface Section (3) to learn more about the DeviceNet network,
communicating with the S70 DeviceNet Servo, and how to use the EDS (Electronic Data Sheet).
Refer to the Troubleshooting Section (4) to solve calibration, actuator movement, or DeviceNet
issues.
2000 BRAY CONTROLS Page 2 of 24
Page 4
S70 DeviceNet Servo Installation & Maintenance Manual
Motor Close LED
DeviceNet Connector
Motor Power
Power LED
Limit Switch
Network LED
Handwheel
Calibration
Button
Feedback Potentiometer
AC Power
Torque Limit
Switch
Motor Open LED
2. Hardware Description
The S70 DeviceNet Servo consists of an electronics module (Figure 1), which includes the
DeviceNet interface, terminal connections to the S70 Actuator, calibration button, DeviceNet
Network Status Indicator, and connections and indicators to features described in Section
Error! Reference source not found..
2000 BRAY CONTROLS Page 3 of 24
Figure 1: S70 DeviceNet Servo
Page 5
S70 DeviceNet Servo Installation & Maintenance Manual
Description
Electrical Notes
Feature Availability
Auto / Manual Handwheel
Actuator Operation
Auto Operation = Low
Manual Handwheel Engaged = Open
Standard
Closed Torque Limit
Normal Operation = Low
Limit Reached = Open
Standard
Open Travel Limit
Normal Operation = Low
Limit Reached = Open
Standard
Closed Travel Limit
Normal Operation = Low
Limit Reached = Open
Standard
Open Torque Limit
Normal Operation = Low
Limit Reached = Open
Standard
2.1 Hardware Features
The following are standard hardware features of the S70 DeviceNet Servo:
DeviceNet 5-position open style connector
S70 Actuator Motor connector
S70 Actuator Limit Switch connector
Feedback Potentiometer connector
Red and green calibration LED indicators
Green Power LED
Green Motor Running Open drive LED
Red Motor Running Closed drive LED
Bi-color (red / green) DeviceNet Network Status LED
2.2 Connector Wiring
2.2.1 S70 Actuator Motor Connector
The S70 Actuator Motor is connected to the S70 DeviceNet Servo motor power terminal
connector with 3 wires: Common (Black Wire), Motor Open (Blue Wire), and Motor Close (Red
Wire).
2.2.2 S70 Limit Switch Connector
If any of the Series 70 features such as the Handwheel switch (Auto / Manual Operation), torque
limit switches, or limit switches (open limit and close limit) are not used, they must be connected
to a terminal labeled “common” for the S70 to operate.
Table 1: Limit Switch Connector J6 pin description
2000 BRAY CONTROLS Page 4 of 24
Page 6
S70 DeviceNet Servo Installation & Maintenance Manual
Description
Wire Color
V-, CAN power supply return
Black
CAN Low
Blue
Shield
Bare/Gray
CAN High
White
V+, CAN power supply source
Red
Description
Requirements
Reference voltage (Gray)
Potentiometer full open end point
Voltage relative to valve position (Orange)
Potentiometer wiper
Ground (White)
Potentiometer full close end
point
V+ CANH SHIELD CANL V-
2.2.3 DeviceNet Connector J7
The Series 70 Actuator is shipped with a DeviceNet Open Style connector as shown below:
This connector has the following pin-out:
Figure 2: DeviceNet Open Style Connector
Table 2: DeviceNet Wire Colors
2.2.4 Feedback Pot J4
The Feedback Potentiometer on the Series 70 Actuator reports to the S70 the actual position of
the valve. The S70 will not operate without this connection in-place.
Figure 3: Feedback Pot Connector J4
2000 BRAY CONTROLS Page 5 of 24
Page 7
S70 DeviceNet Servo Installation & Maintenance Manual
2.2.5 Calibration Button
When the Calibration Button is pressed for 2 seconds, the S70 DeviceNet Servo will start an
automatic calibration.
2.3 Normal Operation
Since the S70 and the Series 70 Actuator is an integral unit, the S70 is powered from the
DeviceNet Bus power. The Actuator motor is powered from the AC line voltage and is
controlled by the S70 DeviceNet Servo. The recommended sequence to start the S70 is as
follows:
1. The DeviceNet network must be powered and connected to the Series 70 Open Style
Connector with proper network termination. Refer to Section 3.2 for more information
regarding DeviceNet network setup.
2. Apply AC power to the Series 70 Actuator.
3. The power LED will light and the S70 Netowrk Status LED will briefly flash Red, then
Green. If the module is properly commissioned the Network LED should begin to flash
green at ½ second intervals. This indicates that the S70 has recognized the DeviceNet
bus, does not have a conflicting address, and is configured at the correct baud rate. If
the DeviceNet LED D17 is red or flashing red, refer to section 4.3 for trouble-shooting. If
any other LEDS are flashing, this indicates an error condition. Refer to Section 4 to
interpret the LED error codes for corrective action.
Once the DeviceNet LED D17 is flashing green, the S70 has become part of the DeviceNet
network and is ready to be commissioned (Section 3.1.5).
2.4 Calibration
The S70 calibration defines the limits of operation of the Series 70 Actuator between the open
valve position and the closed valve position. The S70 calibration is flexible and does not require
that the valve be at the full opened or closed position to define the calibration end points. The
cams on the Series 70, which define the opened and closed positions of the valve are relative to
the user’s requirements and can be set at any location. The only exception is that the open
Cam limit setting must correspond to a valve position that is more open than the Cam, which
defines the closed limit valve position.
Perform the following before the calibration:
1. Before entering the calibration mode, adjust the open and close limit Cams on the Series
70 to the desired position, then manually adjust the valve with the Series 70 Handwheel
engaged to a position midway between the Cams so then neither Cam is engaged.
2000 BRAY CONTROLS Page 6 of 24
Page 8
S70 DeviceNet Servo Installation & Maintenance Manual
2.5 Auto Calibration
To commence the Auto Calibration, do the following:
1. Press the calibration button for 2 seconds and then release.
2. The S70 will automatically seek the closed position and is indicated by the RED LED
D27. If the Actuator is already at the fully closed position, the S70 will move the Actuator
open until the Close switch is disengaged, and then move closed until the closed switch
engages.
3. Next, the S70 will automatically seek the open position. The Actuator will move toward
the opened direction until the opened switch engages.
4. The calibration readings are automatically stored into the S70 non-volatile memory.
5. The Auto Calibration mode can be aborted at anytime by engaging the Handwheel.
The Auto Calibration will fail under the following conditions:
1. The Handwheel is engaged (pulled outward).
2. The Opened or Closed Limit Switch CAMS are incorrectly set.
3. The Torque limit switch is activated during the calibration.
4. The position feedback potentiometer is not plugged into the S70 or is incorrectly
oriented.
5. The Actuator is unable to reach either the Opened or Closed limit switch within 45
seconds.
2000 BRAY CONTROLS Page 7 of 24
Page 9
S70 DeviceNet Servo Installation & Maintenance Manual
3. DeviceNet Interface
The S70 Servo is an ODVA (Open DeviceNet Vendor Association) compliant product. The
ODVA certification ensures that the S70 Servo can operate on any DeviceNet network and
supports all of the features required to operate cooperatively on a network with mixed devices
which are also ODVA compliant.
3.1 DeviceNet Network
DeviceNet is a low-level network that provides connections between simple industrial devices
(sensors, actuators) and higher-level devices (controllers) such as the S70 Servo. DeviceNet
provides:
A cost effective solution to low-level device networking
Access to intelligence present in low-level devices
Master/Slave and Peer-to-Peer capabilities
The list below presents a summary of the Physical/Media specific characteristics of DeviceNet:
Trunkline-dropline configuration
Support for up to 64 nodes
Node removal without severing the network
Simultaneous support for both network-powered (sensors) and self-powered (actuators)
devices
Use of sealed or open-style connectors
Protection from wiring errors
Selectable data rates of 125k baud, 250k baud, and 500k baud
Adjustable power configuration to meet individual application needs
High current capability (up to 16 amps per supply)
Operation with off-the-shelf power supplies
Power taps that allow the connection of several power supplies from multiple vendor that
comply with DeviceNet standards
Built-in overload protection
Power available along the bus: both signal and power lines contained in the trunk-line
3.1.1 Network connections, terminations, power, and limits
Devices on the network are connected as shown in Figure 4. The network consists of two types
of cable; a trunk-line cable and a drop cable. The Trunk line cable is a thicker cable that spans
the length of the network. A device is attached to the Trunk line directly by using either a Tap or
indirectly by using a Tap and a drop cable. The Drop cable is not as thick as the Trunk line and
is only used to connect a single device to the bus.
A terminator of 121 ohms is required at each extreme end of the trunk. The terminator is
attached to the end of the trunk and not to the end of a cable drop.
2000 BRAY CONTROLS Page 8 of 24
Page 10
S70 DeviceNet Servo Installation & Maintenance Manual
The resistor requirements are:
121 ohm
1 % Metal Film
1/4 Watt
Terminating resistors should never be included in nodes. Inclusion of this capability could easily
lead to a network with improper termination (too high or too low an impedance) potentially
causing failure. For example, removal of a node that includes a terminating resistor could result
in network failure.
Devices along the truck-line are attached with Taps (Figure 5) so that any device can be
removed or replaced without disconnecting the trunk-line. This feature provides the ability to
interchange devices on a network while it is operational reducing network downtime.
Both the trunk-line and drop cables consist of 4 wires and a shield. The wire colors and
connector wiring are described in Section (2.2.3) for the DeviceNet Mini-style connector used
in the S70 Actuator, and the DeviceNet Open Style connector used on the S70 Servo.
The trunk-line and drop cable are limited in length and are also effected by the speed of the
network. Refer to Table 3 for details on cable lengths.
Figure 4: Example DeviceNet communication link
2000 BRAY CONTROLS Page 9 of 24
Page 11
S70 DeviceNet Servo Installation & Maintenance Manual
Specifications
125 Kbps Data Rate
250 Kbps Data Rate
500 Kbps Data Rate
Thick trunk length
500 m (1640 ft)
250 m (820 ft)
100 m (238 ft)
Thin truck length
100 m (328 ft)
100 m (328 ft)
100 m (328 ft)
Max drop length
6 m (20 ft)
6 m (20 ft)
6 m (20 ft)
Cummulative drop length
156 m (512 ft)
78 m (256 ft)
39 m (128 ft)
Figure 5: Example of Network connection with tap, Trunk line, and Drop line.
Table 3: DeviceNet Cable Lengths
3.1.2 Network Grounding and Isolation
To prevent ground loops, the DeviceNet network should be earth grounded in only one location.
The physical layer circuitry in all devices is referenced to the V- bus signal. Connection to earth
ground is provided at the bus power supply and is discussed in Section 3.1.3. No current flow
between V- and earth ground may occur via any device other than a power supply. A ground
isolation barrier must exist for every device. The S70 Servo V- bus signal is entirely isolated
from ground and is not affected by the grounding of the S70 Actuator. Since the S70 Actuator is
powered from the line voltage, the body of the S70 Actuator is connected to earth. A safety
hazard may exist if the earth ground connection to the S70 Actuator body is removed.
2000 BRAY CONTROLS Page 10 of 24
Page 12
S70 DeviceNet Servo Installation & Maintenance Manual
DeviceNet should be grounded at ONE location. Grounding at more then one location may
produce ground loops, while not grounding the network will increase sensitivity to ESD and
outside noise sources. The single grounding location should be at a power tap. Sealed
DeviceNet power taps are designed to accommodate grounding. Grounding near the physical
center of the network is also desired.
The trunk drain/shield should be attached to the power supply ground or V- with a copper
conductor that is either solid, stranded, or braided. Use a 1” copper braid or a #8 AWG wire that
is less than 3 meters/10 feet in length. This should then be attached to a good earth or building
ground (such as an 8 foot stake driven into the ground, attached to building iron or to the cold
water plumbing).
If the network is already grounded, do NOT connect the grounding terminal of the tap or ground
of the supply to earth. If more than one supply is on the network, then connect the drain
wire/shield at ONE supply only, preferably near the physical center of the network.
3.1.3 Network Power
In addition to providing communications, DeviceNet also provides power. Because power and
signal conductors both are contained in the cable, devices can draw power directly from the
network without the need for separate power sources.
DeviceNet has a single supply current capability of up to 16 amps using a thick cable trunk line,
and up to 6 amps using a thin cable trunk line , which makes the network highly functional and
cost-effective.
The power bus capabilities for DeviceNet are:
Cable length as long as 500 m (1,640 feet)
Support for as many as 64 nodes of varying current
Adjustable configuration
Because of the flexibility of DeviceNet , there are several power design choices. This section
provides guidelines to help configure power along a network in a way that maximizes
performance and minimizes cost.
Power configuration is adjustable based on your system requirements. The DeviceNet power
bus is supplied by a nominal 24 volt source and can support up to 8 amps on any section of
thick cable trunk line or up to 3 amps on any section of thin cable trunk line. Since this much
current can be drawn from each side of a power tap, a single supply network can possibly
provide twice these current levels. If the system has even greater requirements, DeviceNet
can support multiple power supplies, which can result in almost unlimited power. The majority
of DeviceNet applications, however, will require only one power supply.
Important: Before you begin, familiarize yourself with the country and local codes in which the
system to be installed. In the U.S. and Canada the DeviceNet cable system must be installed
2000 BRAY CONTROLS Page 11 of 24
Page 13
S70 DeviceNet Servo Installation & Maintenance Manual
Network
Length m
(ft)
0
25
(82)
50
(164)
100
(328)
150
(492)
200
(656)
250
(820)
300
(984)
350
(1148)
400
(1312)
450
(1476)
500
(1640)
Maximum
Current in
Amps
8.00
8.00
5.42
2.93
2.01
1.53
1.23
1.03
0.89
0.78
0.69
0.63
Network
Length m
(ft)
0
10
(33)
20
(66)
30
(98)
40
(131)
50
(164)
60
(197)
70
(230)
80
(262)
90
(295)
100
(328)
Maximum
Current in
Amps
3.00
3.00
3.00
2.06
1.57
1.26
1.06
.91
0.80
0.71
0.64
as a Class 2 circuit. This requires limiting the current in any section to 4 amps. The rating of
the system components themselves, however, is 8 amps.
The trunk-line can be constructed of either thick cable or thin cable. A combination of both thick
and thin cable can be used provided that only one type of cable is used for any section of cable
(length between two power taps or between a power tap and the end of the trunk line).
There are several items that can limit the current available on the network. More than one of
these limits can independently exist at the same time:
The 8 amp current limit of thick cable
The 8 amp current limit of mini-style connectors
The 3 amp current limit of thin cable
The 3 amp current limit of micro-style connectors
The maximum common mode limit of the transceiver*
*simply put, this parameter limits the voltage drop that can be tolerated on the power cable. The
current that corresponds to the maximum common mode voltage drop is indicated in Table 4
and Table 5.
Table 4: Maximum current based upon thick cable network length
Table 5: Maximum Current Available based upon Thin Cable Network Length
The network power supply can be placed at the end or at the center of the network. By
examining the current requirements of the network, the power supply should be placed such
that the maximum current specification is not exceeded.
2000 BRAY CONTROLS Page 12 of 24
Page 14
S70 DeviceNet Servo Installation & Maintenance Manual
LED State
Description
Off
The S70 is not on–line and has not
completed the Dup MAC_ID test
yet. The S70 may also not be
powered.
Green
The S70 is on-line and allocated to
a master.
Flashing Green
The S70 is on-line and not
connected (not allocated to a
master)
Red
Non recoverable Critical Link
Failure. The S70 has detected an
error that has rendered it incapable
of communicating on the network.
Flashing Red
The Communication Faulted such
as a connection time-out. The S70
can recover from this error.
The selection of the power supply should ensure a tolerance of +24 VDC +/- 1% and current
capability of 0-16 amps.
3.1.4 Network Status LED
This bi–color (green/red) LED (D17,
Figure 1) indicates the status of the communication link. Refer to table
3.1.5 Commissioning
Commissioning is the process of taking the S70 Servo from the on-line state to establishing a
dedicated connection with a master on the network. The S70 Servo supports a Polled network
connection and an Explicit message connection. These connections are supported
simultaneously but only one connection of each type is supported at a time.
When the S70 Servo transitions from the On-line state to the Commissioned state, the Network
LED (Section 3.1.4) will change from flashing green to a solid green. When the Master / Slave
relationship is released, the Network Led will return to a flashing green.
As an example, if the Mac Id of the S70 Servo is added to the scan list of a process controller,
the process controller will establish a Polled Message connection with the S70 and will transition
the S70 Servo to the commissioned state. Once the S70 Servo is commissioned, the process
2000 BRAY CONTROLS Page 13 of 24
Table 6: DeviceNet Network LED Indicator
Page 15
S70 DeviceNet Servo Installation & Maintenance Manual
controller has exclusive control of the S70 Servo via the polled message connection. The polled
message connection allows the process controller to position the S70 Actuator, and receive the
present actuator position. If the process controller establishes an additional Explicit message
connection, the process controller could also simultaneously monitor or control other features of
the S70 Servo as described in Section (3.1.6).
3.1.6 Supported Attributes
The S70 Servo supports attributes in the Assembly Class (4), Instance (1), which provide
access to the features that are also accessible in the EDS (Electronic Data Sheet). These
attributes are provided in the event the user wishes to monitor or control aspects of the S70
Servo beyond a polled message connection.
A process controller will typically access the S70 Servo through a polled message connection.
A polled message connection only sends and receives the S70 Servo actuator position. To
monitor or control additional features of the S70 Servo, an explicit message must be sent to the
S70 Servo with the appropriate attribute.
As an example, to monitor the temperature of the S70 Actuator motor, the process controller
would send the Group 2 Explicit message Assembly (4), Instance (1), and Attribute (101). The
response from the message would be the two-byte temperature.
The attributes supported by the S70 Servo are listed in Table 3. All attributes can be read (GET
service) and set (SET Service) unless otherwise noted. As an example, attribute 100, Valve
position, if “SET” would position the valve, if the attribute were read (GET), the present valve
position would be returned.
The EDS (Electronic Data Sheet) file, which is provided with the S70 Servo, contains the most
current information pertaining to attribute data. Use the EDS as a reference for data types, data
formats, and data conversion. Also check the Bray WEB site to obtain the latest EDS file for the
S70 Servo (www.bray.com).
2000 BRAY CONTROLS Page 14 of 24
Page 16
S70 DeviceNet Servo Installation & Maintenance Manual
Attribute Description
Attribute (Hex)
Attribute (Decimal)
Valve Position
0x64
100
Actuator Opened /
Closed1
0x67
103
Local / Remote Switch1
0x68
104
Open / Close Limit1
0x69
105
Force Open / Close1
0x70
112
Auto / Manual1
0x71
113
Torque Limit1
0x72
114
Speed Control Enabled
0x73
115
Opening Speed
0x74
116
Opening Speed Begin
0x75
117
Opening Speed End
0x76
118
Closing Speed
0x77
119
Closing Speed Begin
0x78
120
Closing Speed End
0x79
121
Failure Mode Enable
0x7a
122
Failure Position
0x7b
123
Instant Reverse Delay
0x7c
124
Serial Number1
0xC0
192
Feature Set1
0xC1
193
1
Attributes which are not settable.
3.2 Configuration
When adding the S70 Servo to a DeviceNet network, it must be configured with the correct
network Baud Rate and it must also have a unique Mac ID. This is typically referred to as Node
Commissioning.
Normally the S70 Servo should not be added to an existing network until the MAC ID and Baud
rate have been properly set. If the S70 Servo is added to a network with either a conflicting
MAC ID or incorrect Baud rate, the network will not be effected, but the S70 Servo will be taken
offline as indicated by a solid red color on the Network LED. The unit must then be removed
from the network and then added after the conflicts have been resolved.
2000 BRAY CONTROLS Page 15 of 24
Table 7: S70 Servo supported attributes
Page 17
S70 DeviceNet Servo Installation & Maintenance Manual
When adding devices to a network, it is best to setup an independent workstation with a
DeviceNet interface for Node Commissioning. Any Node Commissioning application can be
used to configure the S70 Servo. Refer to the application software user manual for specific
information on Node Commissioning.
3.3 Communication
All communication with the S70 Servo takes place over the DeviceNet network. The DeviceNet
interface gives the user the ability to control and monitor the S70 Servo and S70 Actuator.
The S70 Servo supports standard DeviceNet Polled and Explicit messaging connections.
3.3.1 Polled Message Connection
A polled message connection provides a Master with the ability to rapidly send and receive
short messages to all devices on a network in a “polled” fashion. This is typically the main
communication mode of a process controller.
The Polled message sent by the master must by 2 bytes and corresponds to a requested valve
position. The S70 Servo responds with 2 bytes, which corresponds to the current valve
position.
The range for valid data is “0” to “0x7FFF” which represents a “0°” to “90°” valve position.
3.3.2 Explicit Message Connection
An explicit message connection provides the Master with the ability to directly access a
particular parameter that is supported by the S70 Servo. These parameters are accessed by
using the “GET” or “SET” DeviceNet attribute service. As an example, an Explicit Message can
be used to position the valve, monitor the motor temperature, and set special features. Refer to
Section (3.1.6) for further information.
3.4 EDS (Electronic Data Sheet)
An EDS (Electronic Data Sheet) is an external file that contains information about configurable
attributes for a device, including object addresses of each parameter. The EDS provides the
user with a simple to use interface for configuring and monitoring a device.
Many software applications access the EDS file, which is included with the S70 Servo to aide in
the configuration of the network, and the devices on the network. Products such as the process
controller will use the EDS to automatically obtain the data that is required for configuration.
Refer to Figure 6 for an example of how an application uses the EDS information to create a
graphical display of a network.
2000 BRAY CONTROLS Page 16 of 24
Page 18
S70 DeviceNet Servo Installation & Maintenance Manual
Figure 6: An example display of a network created from EDS information
When the S70 Servo EDS file is accessed through an application as shown in Figure 7, all of
the parameters available for monitoring and configuration are displayed. Since there are more
parameters available than can be displayed on the screen at the same time, the parameters can
be also displayed in groups. In Figure 8, the Parameter Group “Actuator Status” is displayed.
The S70 Servo divides the display into the following groups:
Actuator Status - Actuator Status Group
Actuator Control - Actuator Control Group
Speed Control - Actuator Speed Control Group
Default Behavior - Actuator Default Behavior Group
DeviceNet - DeviceNet settings Group
Product Information - Product Information Group
2000 BRAY CONTROLS Page 17 of 24
Page 19
S70 DeviceNet Servo Installation & Maintenance Manual
Figure 7: Display of S70 Parameters supported by the EDS file
EDS parameters which are settable can be modified and saved to the S70 Servo. As an
example, to change the valve position, the “Valve Position” parameter is highlighted, and then
“Modify Parameter” is selected. Figure 9 is an example of an EDS parameter modification
display. Once the parameter has been modified, it is saved to the S70 Servo and takes effect
immediately.
Depending upon the EDS enabled application that is used, features such as monitoring are
available which provide the user with a continuously updated display the selected parameter
group.
2000 BRAY CONTROLS Page 18 of 24
Page 20
S70 DeviceNet Servo Installation & Maintenance Manual
The S70 Servo supports the following EDS parameters:
Valve Position
Mac Id
Baud Rate
Actuator Action
Travel Limit Switch
Torque Limit Switch
Local/Remote/Off
Open/Stop/Close
Handwheel
Speed Control
Failure Mode
Instant Reverse Delay
Serial Number
Enabled Features
Detailed information on how to use these parameters are provided in the S70 Servo on-line help
system.
2000 BRAY CONTROLS Page 19 of 24
Page 21
S70 DeviceNet Servo Installation & Maintenance Manual
Figure 8: Example of the Actuator Status EDS Group Display
2000 BRAY CONTROLS Page 20 of 24
Page 22
S70 DeviceNet Servo Installation & Maintenance Manual
Figure 9: Example of setting an EDS parameter
4. Trouble Shooting
4.1 Calibration
1. Verify that the Series 70 CAMS are correctly set (Section 2.4) and are engaged when
the Open Limit and Close Limit are reached.
2. Verify that the Feedback Pot (Section 2.2.4), connector J4 is connected and oriented
correctly.
3. If the Calibration still fails, ensure that the S70 has been properly wired to the Series 70
Actuator. Review Section 2.2 for proper connector wiring and then repeat from step 3
above.
2000 BRAY CONTROLS Page 21 of 24
Page 23
S70 DeviceNet Servo Installation & Maintenance Manual
4.2 Actuator Operation
The Series 70 Actuator can be operated in a Remote mode (DeviceNet control) or a Local
mode (manual control) if the Series 70 has the switch box option installed. If the Actuator does
not operate, depending upon the operating mode, the following are possible causes:
If the Series 70 Actuator is operating in the Remote mode, or if the optional switch box is not
installed (Remote mode is default), verify the following:
1. The Network LED D17 (The network LED should be flashing or solid green indicating
that the S70 is online or commissioned. If the Network LED D17 is red or flashing red, a
Network error is present. Follow the trouble-shooting guide in Section 4.3.
2. Using a DeviceNet Network node commissioning application that can access the Bray
Controls EDS (Section 3.4), first scan the Network and locate the Actuator to be tested.
Open the EDS for the located Actuator and verify the following:
a. "Torque Limit Switch" = "OK"
If the Torque Limit Switch is any value other than “OK”, take the appropriate
steps to clear the fault including clearing any obstructions that could cause the
fault, verify proper operation and adjustment of the Torque Limit Switches, and
check the Torque Limit Switch connections and wiring (Section 2.2).
b. "Local/Remote/Off" = "Remote"
If the “Local / Remote / Off” section indicates “Local” and the Series 70 does not
have a switch box, the S70 is not properly connected. Review Section 2.2 to
correct the wiring fault.
c. "Handwheel" = "Disengaged"
The Handwheel must be completely pushed in for Remote operation. If the
Handwheel does not turn freely with little effort, it is not completely disengaged.
If the Handwheel is completely disengaged but is still reported as “Engaged”, the
S70 is not wired correctly or the Handwheel switch is malfunctioning. Review to
Section 2.2 to correct the wiring fault.
2000 BRAY CONTROLS Page 22 of 24
Page 24
S70 DeviceNet Servo Installation & Maintenance Manual
DeviceNet Network
Trouble-shooting Start
LED D17 Flashing or
Solid RED?
No
LED D17 Flashing or
Solid Green?
No Power to the
S70
No
Yes
Was the S70 just
added to the Network?
Yes
Yes
Possible Duplicate
MacID. Refer to the
Duplicate MacID
Trouble-shooting
Section
DeviceNet Network is
Good, S70 is online
DeviceNet Network is
Good, S70 is online
Network LED
Flashing Green?
Network LED
Flashing Green?
Possible Baud Rate
Error. Refer to the
Baud Rate Trouble-
shooting Section
Possible Network
Power or connection
error. Refer to the
Network Connections
Trouble-shooting
Section
No No
Yes Yes
No
4.3 DeviceNet Network Errors
If the DeviceNet LED D17 (
Figure 1) remains a solid or flashing Red color, then a DeviceNet network error has occurred.
Refer to the flow chart in Figure 10 as a trouble-shooting guide.
2000 BRAY CONTROLS Page 23 of 24
Figure 10: DeviceNet Network Trouble-shooting guide
Loading...