GE Motor Protection System, LM10 A.3.9 Data Table Layout, Table A-4 Data Table Layout

LM10 AND ALLEN-BRADLEY SLC500 VIA DEVICENET™CHAPTER A:

Table A–3: Status Codes Provided by ODVA Specification

Status Data	Definition
0	Transaction Block Empty
1	Transaction successful
2	Transaction in progress
3	Slave not in scan list
4	Slave offline
5	DeviceNet port disabled
6	Transaction TXID unknown
7	Unused
8	Invalid command
9	Scanner out of buffers
10	Other transaction in progress
11	Could not connect to slave device
12	Response data too large for block
13	Invalid port
14	Invalid size specified
15	Connection bust

A.3.9 Data Table Layout

The data table layout is shown below.

Table A–4: Data Table Layout

Data Location	High Byte	Low Byte
N X:0	TXID	Command
N X:1	Port	Size
N X:2	Service	MAC ID
N X:3	Class (high byte)	Class (low byte)
N X:4	Instance (high byte)	Instance (low byte)
N X:5	Attribute (high byte)	Attribute (low byte)
N X:6	Data (high byte)	Data (low byte)

Note that X will be any number set in the data file.

The TXID high byte is used for message tracking and is incremented and checked by ladder logic. The Command low byte is defined as follows:

•1 = Execute the block

•2 = Clear response buffer (1747-SDN only)

•The Port high byte is defined as follows:

•0 = Channel A

•1 = Channel B

The Port byte is always “0” for the 1747-SDN.

The Size low byte represents the number of bytes in the transaction body. Essentially, this is the number of bytes following the MAC ID field.

The Service high byte is defined as follows:

A–22 LM10 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL