Thomas & Betts Limitorque MX Device Net Field Unit manual Network Management, Mac Id, Baud Rate

Limitorque MX DeviceNet Field Unit  FCD LMENIM2328-00 – 11/05

Table 4.41 – Analog Output Point Object

Instance ID	Channel Interface Object
1	Instance Attribute 19

Source

AO_Analog_Output_CHAN

4.4.8MAC ID

The MX-DeviceNet unit may have the MAC ID set by one of two different methods. The first is the MX LCD display. The other is via the DeviceNet bus.

4.4.9Baud Rate

The MX-DeviceNet unit may have the Baud Rate set by one of two different methods. The first is the MX LCS display. The other is via the DeviceNet bus.

4.5Network Management

4.5.1Offline Connection Set

NOTE: The DeviceNet Limitorque Interface supports Offline Connection Set. The Offline Connection Set is used to bring back a node to the DeviceNet bus which is in the Communication Fault State. This state will be entered in the case of a duplicate MAC ID error is detected.

4.5.2Device Heartbeat Message

The DeviceNet Limitorque Interface supports Device Heartbeat message. This message broadcasts the current state of the DeviceNet Limitorque Interface. Table 4.42 shows the format of the data field of the Device Heartbeat Message.

Table 4.42 – Format of the Device Heartbeat Message

Byte Set 7

6

5

4

3

2

1

0

0	DeviceNet Protocol Specific
1
2	Identity Object Instance ID = 1
3
4	Device Stats = 3
5	Reserved	EV	SF	UF	DF
	(0)	(0)		(0)

6(0) because the Configuration Consistency Value (Attribute 8 of the Identity Object Instance) is not

7supported by the DeviceNet Limitorque

	EV  Event Flag, zero (0)
	SF  System Fault, a fault in the device caused by DeviceNet bus interaction (e.g. connection timeout).
	This flag is set, when a system fault is present. This DeviceNet Limitorque Interface flag is set when a
	connection times out.
	UF  User Fault, a fault in the device caused by user interaction. This flag is set when a user fault is
	present. The conditions under which is set are vendor specific. This DeviceNet Limitorque Interface flag
	is not used and is zero (0).
34	DF  Device Fault, an internal fault in the device not caused by user or bus interaction (e.g. hardware
	fault). This flag is set when a device fault is present. This DeviceNet Limitorque Interface flag is set
	under the following conditions:

• (DI_Actuator_Faults_1_Chan ≠ 0) OR (DI_Actuator_Faults_3_Chan ≠ 0)