Appendix 1 Modbus Protocol
36
TI 01W01A56-01EN
[DIAG_STATUS]
SA100.11a Field Wireless Device supports self-diagnostics data block which is called DIAG_
STATUS. Below is the DIAG_STATUS data block. Data block starts with 8bit “Data Status”
information.
Status
(8bit :Unsigned16)
DIAG_STATUS
(32bit: Unsigned32)
DIAG_STATUS is mapped as below with 8bit reserved space.
16
8 7
0
00000000
Status (8bit)
DIAG_STATUS (Upper 16bit)
DIAG_STATUS (Lower 16bit)
Below is an example of DIAG_STATUS information. Typically the host system checks the first 4
bits (Bit28 to Bit31) to determine device diagnostics results. Alarm categories, F, C, O, and M are
configurable.
Bit0 always indicates “1: available”.
NOTE
All the data types are big-endian format.
Mar. 31, 2014-00