User manual

IEC61131 User and Reference Manual
April 22, 2008
297
Bit
Description
5
overrun error
4
framing error
3
longitudinal parity error
2
reserved – always 0
1
buffer overflow
0
undefined
If bit 7 of the high byte is cleared, the high byte contains a command response summary.
The following table shows common values. Other values may be defined for specific
commands. Consult the documentation for the HART device.
Code
Description
32
Busy – the device is performing a function that
cannot be interrupted by this command
64
Command not Implemented – the command is not
defined for this device.
The low byte contains the field device status. This field is bit-mapped. The following table
shows the meaning of each bit as defined by the HART protocol specifications. Consult the
documentation for the HART device for more information.
Bit
Description
7
field device malfunction
6
Configuration changed
5
cold start
4
more status available (use command 48 to read)
3
primary variable analog output fixed
2
primary variable analog output saturated
1
non-primary variable out of limits
0
primary variable out of limits