User`s manual

GFK-2334A Chapter 5 PROFIBUS Master Status and Diagnostics 5-15

Note: A GE Fanuc 90-30 PROFIBUS Slave (PBS201) returns 13 bytes (7 words) of

data. Word 10 needs to be 9 or larger.

(Word 11) Slave Number: Word 11 specifies the address of the slave to which

COMMREQ is directed. If the address of the master or a slave that is not on the bus is

entered, a Status response of 4 is returned.

Get Device Diagnostics Reply Data Format –

Response written to location specified by Words 8 & 9

Word Name Description

Command Code Echo of the Command Code = 4.

2 Size x of Diagnostics

Received

Size of the Extended Diagnostics received. This

will indicate the number of bytes.

3 Diag 0 (Low Byte)

Diag 1 (High Byte)

Extended diagnostic data bytes.

4 Diag 2 (Low Byte)

Diag 3 (High Byte)

Extended diagnostic data bytes.

…

2 + (x/2) Diag ….x (Low Byte)

Diag ….x+1 (High

Byte)

Extended diagnostic data bytes.