Communications
10.3 Transfer of diagnostic alarms to the controller
SIPLUS HCS4200
Operating Instructions, 11/2015, A5E35066204A/RS-AA/002
103
10.3.2
Transferring diagnostic alarms to the controller: PROFIBUS
Diagnostics alarms
Diagnostic alarms are transferred as diagnostic interrupts. The PROFIBUS device
identification number is required for identifying a diagnostic interrupt.
The HCS4200 has the identification number 81C4.
The evaluation in SIMATIC is performed via I/O_FLT1 (OB82) and RALRM (SFB54).
Structure of the diagnostics alarm
The alarm message consists of 4 bytes of header (standardized) and 4 bytes of user-specific
data. These are to be interpreted as follows:
Byte
Description
4,5
Channel number
The following applies for channel numbers:
•
Channel number = 0: Diagnostic information relates to one module (CIM, POM,
PM)
•
Channel numbers <> 0: Diagnostic information relates to one channel (for POM,
PM only)
The power channel numbers are counted across the entire HCS.
6,7
Error type (see Manufacturer-specific error codes (Page 104))