ABB NPBA-12 Installation And Startup Manual page 28

Chapter 6 – Communication
Byte
7
8
SAP 128
(Data_Exchange)
6-4
Type: Octet String - Length: 6 (Standard) + 2 (Extended Diagnosis)
Ext_Diag_Data
The number of bytes reserved for Extended Diagnosis (including this byte)
Fixed to 2
Ext_Diag_Data
0 = OK
4 = Actual value channel is not updated (last value retained)
Allows the master to send output data to a slave station and to
simultaneously request input data from the same station.
Type: Octet String - Length: 0 to 32 (depending on the selected PPO Type)
Type: Octet String - Length: 0 to 32 (depending on the selected PPO Type)
Diag_Data (Diagnostic Data)
Description
Outp_Data (Output Data)
Inp_Data (Input Data)
NPBA-12 Installation and Start-up Guide