Rockwell Automation 198x Modular DeviceNet Starter Auxiliary I/O - Manual (Page 159)

DeviceNet Information A-19
Publication 198-UM001B-EN-P September 2001
Multiple instances of the Presence Sensing Object are supported. All instances contain the
following attributes.:
Acknowledge Handler Object — Class ID (2Bhex)
A single instance (Instance 1) of the Acknowledge Handler Object is supported. The
following instance attributes are supported.
Table A.29 Presence Sensing Object Instance Attributes
Attribute
ID
Access
Rule
Name Data Type Value
1 Get Output BOOL 0 = No signal present
1 = Signal present
8 Get/Set Operate Mode BOOL 0 = Output attribute as specified
1 = Output attribute inverted
122 Get Open BOOL 0 = No open condition
1 = Open condition detected
123 Get Short BOOL 0 = No short condition
1 = Short condition detected
Table A.30 Presence Sensing Object Common Services
Service Code Implemented for: Service Name
Class Instance
0x0E Yes Yes Get_Attribute_Single
0x10 No Yes Set_Attribute_Single
IMPORTANT
When using an external splitter with the sensor module, Attribute 122
will only indicate “open” when both sensors are open. Likewise,
Attribute 123 will indicate a shorted condition for both sensor
instances even if only one of the sensors on the splitter is shorted.
Table A.31 Acknowledge Handler Object Attributes
Attribute ID Access Rule Name Data Type Value
1 Get/Set Acknowledge
Timer
UINT ms
2 Get/Set Retry Limit USINT 1
3 Get COS Producing
Connection
Instance
UINT 4