Thomas & Betts Limitorque MX Device Net Field Unit Discrete Input Point Object Class ID 8 08hex

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

Note 1: At boot time of the DeviceNet Limitorque Interface the values stored in non-volatile memory are used. The SMT Main Board could at any time send new values via SPI.

The other instance attributes do not have any external interfaces, these values are managed in the protocol stack of the DeviceNet Slave Software.

The further optional attribute Quick Connect (Attribute ID 10) is not supported by DeviceNet Limitorque Interface.

4.4.4Discrete Input Point Object – Class ID 8 (08hex)

The Discrete Input Point Object is used to provide an interface to a subset of the discrete inputs of the MX.The Discrete Input Point Object is implemented with 15 instances described in Table 3.1‑25, so that each of the selected discrete inputs of the MX is connected to one instance.

The purpose of this object is to have a SINGLE-BIT access to the discrete inputs from user and to monitor the state of relay discrete outputs of the MX via the DeviceNet network for test and diagnostic purposes.

The Discrete Input Point Object is just another representation of the selected discrete input data in the Channel Interface Object Instance Attribute 7 (DI_Disc_User_Input_Chan) and Attribute 8 (DI_Read_ Disc_Output_Chan) see Chapter 3.2.1.2.

Table 4.38 – Discrete Input Point Object

Instance ID Channel Interface Object

Source

1	Instance Attribute 7, Bit 0	DI_Disc_User_Input_Chan
		Discrete Input #1
2	Instance Attribute 7, Bit 1	DI_Disc_User_Input_Chan
		Discrete Input #2
3	Instance Attribute 7, Bit 2	DI_Disc_User_Input_Chan
		Discrete Input #3
4	Instance Attribute 7, Bit 3	DI_Disc_User_Input_Chan
		Discrete Input #4
5	Instance Attribute 7, Bit 4	DI_Disc_User_Input_Chan
		Discrete Input #5
6	Instance Attribute 7, Bit 5	DI_Disc_User_Input_Chan
		Discrete Input #6
7	Instance Attribute 7, Bit 6	DI_Disc_User_Input_Chan
		Discrete Input #7
8	Instance Attribute 7, Bit 7	DI_Disc_User_Input_Chan
		Discrete Input #8
9	Instance Attribute 8, Bit 0	DI_Read_Disc_Output_Chan
		Relay Discrete Output #1
10	Instance Attribute 8, Bit 1	DI_Read_Disc_Output_Chan
		Relay Discrete Output #2
11	Instance Attribute 8, Bit 2	DI_Read_Disc_Output_Chan
		Relay Discrete Output #3
12	Instance Attribute 8, Bit 3	DI_Read_Disc_Output_Chan
		Relay Discrete Output #4
13	Instance Attribute 8, Bit 4	DI_Read_Disc_Output_Chan
		Relay Discrete Output #5
14	Instance Attribute 8, Bit 5	DI_Read_Disc_Output_Chan
		Relay Discrete Output #6
15	Instance Attribute 8, Bit 6	DI_Read_Disc_Output_Chan
		Relay Discrete Output #7

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