Rockwell Automation 294D ArmorStart LT Distributed Motor Controller DeviceNet Version - User Manual - Manual (Page 240)

240 Rockwell Automation Publication 290D-UM001A-EN-P - June 2012
Appendix B CIP Information
Attribute Symantics
1) Zone Connection ID - Contains the Consumed_Connection_Id attribute
for the connection represented by this object instance. The default value will be
0xFFFF. For consuming connections, the value 0xFFFF disables the consumption
of data for the connection. For producing connections, this value represents the
connection ID on which production occurs. For predefined producing
connections, this value is set to the producing Connection ID when Auto Run
occurs at power-up, or upon allocation of the connection.
2) Zone Health - Indicates the health status of the zone connection. If the ZIP
connection for the zone times out, this parameter is set to the value 1 = Not
Healthy. Also, if Data Security is enabled and the Zone Key received in the
consumed I/O message does not match the entered Zone Key attribute, 1 = Not
Healthy is reported. For ZIP implementations that use predefined connection
instances, this value is 0 = Healthy (the default value) when ZIP is disabled for
the instance i.e. when the Zone Connection ID attribute is 0xFFFF. This value is
0 = Healthy when ZIP is disabled via the ZIP Enable class attribute.
3) Zone Point Mask - Allows for the selection of the consumed bytes within a
consumed message for use by in the Zone Point Data Table. Each single bit in the
mask represents a corresponding byte in the consumed message packet.
4) Zone Point Offset - Allows consumed data to be placed within the Zone
Point Data Table. This offset is application-specific. For ArmorStart LT, it
represents a byte offset into the Discrete Zone Point Data Table.
5) Zone RPI - The requested packet interval (in milliseconds) of the connection
represented by this ZIP object instance. For DeviceNet implementations, this
value is placed in the connection object Expected Packet Rate attribute. If a
consuming connection does not receive data in 4 times this value, the connection
times out, and the Zone Health attribute is set to the value 1 = Not Healthy. For
producing connections, the expected packet rate specifies the heartbeat rate.
6) Zone PIT - The Production Inhibit Time (in milliseconds) associated with a
connection.
7) Zone Key - For producing instances, this value is calculated by performing a
CRC on all of the ZIP class and instance attributes, and all other device
configuration values deemed necessary to insure the integrity and meaning of
ZIP data produced on the network. The Identity Object device keys should
always be included in the CRC calculation. For consuming instances, this is the
value of the Zone Key calculated in the producing connection whose data is to be
consumed. The ZIP consuming connection will validate the security key received
within each consumed message against this stored value.
8) ZIP Auto Run - When enabled, the producing device creates and configures a
producing connection at power-up. For initial ZIP implementations on
DeviceNet, a connection is created, and the contents of the Allocation
Information attribute in the DeviceNet Object are set accordingly. The
connection is no longer available for allocation within the predefined