Among other things, this information is evaluated by the I/O module and signaled to the CPU via
maintenance messages.
Description
The 1st and 2nd status byte is structured as follows:
1st status byte
With bit 7 = 1: Communication error
Bit 6 = 1
Bit 5 = 1
Bit 4 = 1
Bit 3 = 1
Bit 2 = 0
Bit 1 = 1
Bit 0 = 0
Parity error
Overow
Framing error
Checksum error
Reserved
Overow in the receive buer
Reserved
With bit 7 = 0: Bit 0 to 6 Specic according to the response frame
2nd status byte
Bit 7 = 1
Bit 6 = 1
Bit 5 = 1
Bit 4 = 1
Bit 3 = 1
Bit 2 = 1
Bit 1 = 1
Bit 0 = 1
Device error
Conguration changed
Startup (cold start)
More status information available
Fixed analog output current
Analog output current saturated
Secondary variable outside the limits
Main variable outside range
HART function
8.2 HART system connection
F-AI 8xI 2-/4-wire HART HA
82 Equipment Manual, 09/2021, A5E50557845-AA
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