ABB COMMANDER 300, Руководство по эксплуатации

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9
8 COMMUNICATION…
8.4 Communication Examples
The following examples show typical master-to-slave transmissions and the subsequent slave-
to-master replies. For
Error Code
and
Parameter
interpretations refer to Sections 8.5 and 8.6.
M STX 05
End of text
c) Command –
STX M05 MG E ETX
Command understood
Controller number 5
Reply:
MG ETX
Controller number five
'Multiple Read' command
Start of text
05 MV 60.0 ACK
05 IS 0
05 SP 65.0
ACK
05 OP 72.5 ACK
ACK
Measured value 60.0
Instrument status 0 *
Control setpoint 65.0
Control output 72.5% ETB
ETB
ETB
ETB ACK
Multiple read mnemonic
End of transmission block
* '0' is the normal status – see Fig. 8.7
overleaf.
M STX 05
End of text
d) Command –
STX M05MV ETX
05 19
Command not understood
Error code 19
Reply – 0519 N NAK
MV ETX
Measured (process) Variable
Controller number five
'Multiple Read' command
Start of text
NAK
Controller number five
i.e. the 'Multiple Read' command cannot
be used for a single parameter – see
Section 8.6.
06
R STX 06
End of text
a)
PB 100.0
Command understood
Proportional band is 100%
PB ETX
Proportional band
Controller number six
'Read' command
Start of text
ACK
Controller number 06
Command – STX R06PB E ETX
Reply – 06PB100.0 ACK
07
R STX 07
End of text
b)
02 NAK
Command not understood
Error code 2
IX ETX
Parameter 'IX'
Controller number seven
'Read' command
Start of text
Controller number seven
i.e. 'IX' in the original command is not a
recognised 'Read' parameter – see
Section 8.6.
Command – STX R07IX E ETX
Reply – 0702 NAK