ABB COMMANDER 300 - Communication Examples

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.
MSTX 05
End of text
c)
Command – STX M05 MG EETX
Command understood
Controller number 5
Reply:
MG ETX
Controller number five
'Multiple Read' command
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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.
MSTX 05
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d)
Command – STX M05MV ETX
05 19
Command not understood
Error code 19
Reply – 0519 NNAK
MV ETX
Measured (process) Variable
Controller number five
'Multiple Read' command
Start of text
NAK
Controller number five
i.e. the 'Multiple Read' command canno
t
be used for a single parameter – se
e
Section 8.6.
06
RSTX 06
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a)
PB 100.0
Command understood
Proportional band is 100%
PB ETX
Proportional band
Controller number six
'Read' command
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ACK
Controller number 06
Command – STX R06PB EETX
Reply – 06PB100.0 ACK
07
RSTX 07
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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 – se
e
Section 8.6.
Command – STX R07IX EETX
Reply – 0702 NAK