Watlow Series SD6 PID Controller with DeviceNet Addendum - Manual (Page 4)

Wa t l o w S e r i e s S D 6 P I D w i t h D e v i c e N e t ■ 4 ■
Table 7. Identity Object Class Attributes
Number Access
Rule Namer Name DeviceNet Data Type Description of
Attribute Semantics of
Values
Group 2 Only Server
A slave (server) device that is UCMM incapable and must
use the Predefined Master/Slave Connection Set to estab-
lish communications (at a minimum, the Predefined
Master/Slave Explicit Messaging Connection must be sup-
ported). A Group 2 Only device can transmit and receive
only those identifiers defined by the Predefined
Master/Slave Connection Set (reference DeviceNet Spec.,
Vol. 1, Sec. 2).
Master/Slave Connections
The SD6 supports the Predefined Master/Slave Connection
Set (refer to DeviceNet Specification, Vol. 1, Sec. 7). The
general model calls for the utilization of an Explicit
Messaging Connection to manually create and configure
Connection Objects within each connection end-point. This
chapter uses the general model as a basis for the definition
of a set of connections that facilitate communications typi-
cally seen in a master-slave relationship. These
Connections are referred to collectively as the Predefined
Master/Slave Connection Set.
The master is the device that gathers and distributes I/O
data for the process controller. Slaves are the devices from
which the master gathers I/O data and to which the mas-
ter distributes I/O data. The master “owns” the slaves
whose MAC IDs appear in its scan list. To determine with
what slaves it will communicate, the master examines its
scan list and sends commands accordingly. Except for the
Duplicate MAC ID Check, a slave cannot initiate any com-
munication before being told by the master to do so.
Electronic Data Sheet (EDS)
The EDS allows a configuration tool to automate the device
configuration process. The EDS specification provides an
open standard for device configuration and compatibility
among all DeviceNet products. (Refer to the DeviceNet
Specification, Vol. 1, Chapter 4). You can obtain a copy of
the EDS at www.watlow.com and search on keywords SD
EDS, request a copy by sending an e-mail to wintechsup-
[email protected] or by calling an Application Engineer at
+1 (507) 494-5656 between 7 a.m. and 5 p.m. Central
Standard Time (CST).
DeviceNet Objects
The following sections describe the standard DeviceNet
objects and the SD6-specific application objects.
Identity Object
Class Code: 01hex
The Identity object provides identification information for
the device. This includes the device manufacturer, product
name, product type, serial number and revision.
Refer to the DeviceNet Specification (Vol. II, Sec. 6-2) for
complete requirements.
Status Attribute – This is a bit field that represents the
current status of the device. Two of the bits in the Status
attribute, the Minor Recoverable Fault and Major
Recoverable Fault bits, shall never be set. In accordance
with the semiconductor industry standard, all module level
faults are considered to be unrecoverable faults.
Table 6. Identity Object Revision History
Revision Description
01 Initial Release