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WCAIM2012 Supplement 1 – ACCESS I and M DeviceNet Specification 5

Common Services

Implemented For:

Service Code Class Instance Service Name

14 (0x0E) Yes Yes Get_Attribute_Single

(1) Max Object Instance = 5

(2) Input Value determines overall condition of inputs. The LED

indicators will reflect state of inputs.

State x Interpretation

OFF 0 Input is OFF. LED is OFF

ON 1 Input is ON. LED is ON

Discrete Output Point (DOP) Object

Class Code: 09 (0x09)

The Discrete Output Point (DOP) Object models discrete inputs in a

product. You can use this object in applications as simple as a toggle

switch or as complex as a discrete I/O control module. There is a

separate instance for each discrete output available on the device.

DOP Object Class Attributes

Attribute Access Name Type Value

1 Get Revision UINT 1

2 Get Max Object Instance UINT 7

6 Get Max Class Identifier UINT 7

7 Get Max Instance Attribute UINT 8

DOP Object, Instance 1…2 Attributes

Attribute Access Name Type Value

3 Get/Set Value BOOL (1)

4 Get Status BOOL (1)

5 Get/Set Fault State BOOL (2)

6 Get/Set Fault Value BOOL (2)

7 Get/Set Idle State BOOL (3)

8 Get/Set Idle State BOOL (3)

Common Services

Implemented For:

Service Code Class Instance Service Name

14 (0x0E) Yes Yes Get_Attribute_Single

16 (0x10) No Yes Set_Attribute_Single

(1) Output Value and Status determine overall condition of outputs.

State x Interpretation

OFF 0 Output is OFF

ON 1 Output is ON

State x Interpretation

OK 0 Output is OK

FAULT 1 Output is at FAULT

(2) The Fault Value and Fault State determine the unit’s reaction to an

output fault condition.

Under normal operation the status information has the same state

as Output value. If a fault condition is detected the status is the

complement of the Output value.

State x Interpretation

0 0 Turn output OFF and OK

1 1 Turn output ON and OK

0 1 Turn output OFF and faulted

1 0 Turn output ON and faulted

(3) The Idle Value and Idle State determine the unit’s reaction to an

output idle condition.

State x Interpretation

0 0 Turn output OFF if idle

0 1 Turn output ON if idle

1 x Leave output unchanged if idle

Acknowledge Handler

Class Code: 43 (0x2b)

The Acknowledge Handler is used to manage the reception of

message acknowledgements.

Acknowledge Object, Class Attributes

Attribute Access Name Type Value

1 Get Revision UINT 1

Acknowledge Object, Instance 1 Attribute

Attribute Access Name Type Value

1 Get/Set Acknowledge Timer UINT (1)

2 Get/Set Retry Counter USINT (2)

3 Get COS Producing UINT 4

Connection Instance

Common Services

Implemented For:

Service Code Class Instance Service Name

14 (0x0E) Yes Yes Get_Attribute_Single

16 (0x10) No Yes Set_Attribute_Single

(1) The Acknowledge Timer sets the interval after which new data can

be produced.

(2) Retry counter sets the number of times the COS/Cyclic message is

sent.

Flow Control

Worcester Controls

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