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Rockwell Automation Publication 1440-UM001D-EN-P - September 2016 145
CIP Objects Appendix B
Services
Relay Object (Class ID 323
H
) The Relay Object models a relay (actual or virtual). A relay can be activated or
deactivated based on the status of one or more alarms.
Class Attributes
Instances
There is one instance of the object. Instance 1 is a virtual relay that corresponds
with the Relay status indicator on the module.
Instance Attributes
Table 72 - Overall Measurement Object Services
Service Code Class/Instance Usage Name Description
0E
h
Instance Get_Attribute_Single Returns one attribute.
10
h
Instance Set_Attribute_Single Sets one attribute.
(1)
(1) Attributes can only be set while the device is in Program mode. See the description of the Device Mode Object for more information.
Table 73 - Relay Object Class Attributes
Attribute
ID Access Rule Name Data Type Description Semantics
3 Get Number of Instances UINT Number of Instances in this class. 5
100 Set Reset All USINT Setting this attribute is equivalent to executing
the Class Reset service Reset All is an attribute that provides a way to perform a
Class level Reset service via the Set_Attribute_Single
service. Setting this attribute to any value is equivalent to
performing the Class level Reset service. Reading the Reset
All attribute always returns zero.
IMPORTANT Instances 2…5 are not available when the module is configured in the
RSLogix 5000 software.
Table 74 - Relay Object Instance Attributes
Attribute ID Access Rule Name Data Type Description Semantics
3 Get Relay Status BOOL The status of the relay. 0 = Off
1 = On
4 Get/Set Relay Enable BOOL Indicates whether this relay object is
enabled. 0 = Disabled
1 = Enabled
5 Get/Set Latch Enable BOOL Indicates whether this relay latches
(requires a reset command to
deactivate). 0 = Nonlatching
1 = Latching