ABB COMMANDER 500 - Exception Responses; Examples

17
Table 6.1 Exception Response Codes
sserddAnoitcnuFnoitpecxE
dleiFkcehCrorrE
)61CRC(
1038200C1F
sserddAnoitcnuF
tesffOtratSretsigeRsretsigeRfo.oN
dleiFkcehCrorrE
)61CRC(
hgiHwoLhgiHwoL
103010B200604BC3
noitpecxE
esnopseR
edoC
noitpecxE
emaNesnopseR
noitinifeDesnopseRnoitpecxE
10noitcnuFlagellI
noitcnufelbawollanatonsideviecernoitcnufegassemehT
005REDNAMMOCehtno
20sserddAataDlagellI
elbawollanatonsidleifatadehtniecnerefersserddaehT
005REDNAMMOCehtrofsserdda
30eulaVataDlagellI
ehtnoelbawollatonsidleifatadehtnidecnerefereulavehT
.noitacolevalsdesserdda
70
evitageN
tnemegdelwonkcA
.demrofrepebtonnacdetseuqertsujnoitcnufehT
80rorrEytiraPyromeM
ehtfoeromroenonirorrenasetacidnikcehcytiraP
.deviecersretcarahc
6 EXCEPTION RESPONSES
The exception response codes sent by the slave are shown in Table 6.1. When a slave detects one
of these errors, it sends a response message to the master consisting of slave address, function
code, error code and error check fields.
6.1 Examples
A Read Register Request to read holding register address 300 of Slave 01 (undefined address for
Slave, beyond address limit).
The slave replies with an exception response signifying an ‘illegal data address’. To indicate that the
response is a notification of an error, the most significant bit of the function code is set to 1.