Flowserve Worcester Controls Supplement 1 ACCESS I - Manual (Page 5)

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