
PLX51-HART-4I / PLX51-HART-4O
♦
HART Input/Output
What is HART?
Multidrop Field Devices
User Manual
ProSoft Technology, Inc.
Page 123 of 127
7.2 HART Response Status
Table 7.1 - Status Decoding (when first byte bit 7 = 0)
If Byte 0 Bit 7 = 0 then:
First Byte : Command Errors
Value Description
0
No error
1
(Undefined)
2
Invalid selection
3
Passed parameter too large
4
Passed parameter too small
5
Too few data bytes received
6
Transmitter specific error
7
In write-protect mode
8-15
Command specific error
16
Access restricted
32
Device is busy
64
Command not implemented
Second Byte : Device Status
Bit
Description
0
PV out of limits
1
Variable (non-PV) out of limits
2
Analog output saturated
3
Output current fixed
4
(Undefined)
5
Cold Start
6
Configuration Changed
Table 7.2 - Status Decoding (when first byte bit 7 = 1)
If Byte 0 Bit 7 = 1 then:
First Byte : Communication Errors
Bit
Description
0
(Undefined)
1
Rx buffer overflow
2
(Undefined)
3
Checksum error
4
Framing error
5
Overrun error
6
Parity error
Second Byte : Not defined
Value
Description
0
(Always zero)