APARIAN A-HRT-4I, Руководство пользователя

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Operation
Document No. D113-015 Page 40 of 77
Revision 1.9
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 4.6 - Status Decoding (when first byte bit 7 = 0)
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)
Table 4.7 - Status Decoding (when first byte bit 7 = 1)
4.1.3.2. HART COMMAND EXAMPLE
In the example below a Logix message instruction is used to Read the Unique Identifier of the
device. This makes use of the Universal Command #0. The field device is connected to channel
0, hence the Instance value set to 1.