Communication; Useful Information About Communication; 2Nd Status Byte; 1St Status Byte - Siemens SIMATIC ET 200SP HA Equipment Manual

HART function

7.3 Communication

Description
The 1st and 2nd status byte is structured as follows:
Table 7-1
When 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
When Bit 7 = 0: Bit 0 to 6 Specific according to the response frame
Table 7-2
Bit 7 = 1
Bit 6 = 1
Bit 5 = 1
Bit 4 = 1
Bit 3 = 1
Bit 2 = 1
Bit 1 = 1
Bit 0 = 1
7.3 Communication
7.3.1

Useful information about communication

Reference is made to communication with HART in the following.
HART communication
With enabled HART operation, the analog module independently sends HART commands to the
connected field devices. This always takes place alternatingly on a channel-specific basis with
any pending external HART commands that arrive via the command interface of the module.
• HART command (Page 39)
• HART command interface (Page 63)
The I/O module is used in the following operation:
Parallel operation (Page 41)
38

1st status byte

Parity error
Overflow
Framing error
Checksum error
Reserved
Overflow in the receive buffer
Reserved

2nd status byte

Device fault
Configuration changed
Startup (cold start)
Additional status information available
Fixed analog output current setting
Analog output current saturated
Secondary variable outside the limits
Primary variable outside the range
AQ 4xI HART ISOL HA
Equipment Manual, 07/2022, A5E50102497-AB