Nidec AD3000 - Command Word, Status Word, Alarm Word; Control Parameterisation Via PROFIBUS DP; Parameterisation Message Sent by the Master to the Slave; Parameterisation Message Sent by the Slave to the Master

4 – PROFIBUS DP AD3000
NIDEC ASI S.P.A. – AD3000 COMMUNICATION MANUAL
22 IMAD30007EN
4.12 Command word, status word, alarm word
Command words are used to send commands to the AD3000 through the PROFIBUS DP network; for the meaning of every command word bit see
paragraph 8.4.1 of the Programming Manual.
Status words are used by the control to provide information concerning the drive status; for the type of information transmitted and the meaning of the
relevant logic states see paragraph 8.4.2 of the Programming Manual.
Through the alarm status words, the control provides information concerning the drive alarm status; for the decoding of the alarm words bits see
paragraph 8.4.3 of the Programming Manual.
4.13 Control parameterisation via PROFIBUS DP
The drive configuration parameter setting can be implemented via PROFIBUS DP by using the PKW parameterisation data of messages exchanged
between the master and slave (drive). Said data is used by the PROFIBUS DP master to transmit or receive slave configuration parameter values;
through PKW data the chosen parameterisation is automatically stored.
The PKW parameterisation data are supported only with PPO1, PPO2 and PPO5 type messages; each one of them has 4 PKW data available both
in the message sent by the master to the slave and in the message sent by the slave to the master.
4.13.1 Parameterisation message sent by the master to the slave
Such message consists of 4 words.
Word
Meaning
1
st
word (PKW1)
Ty pe of operation code:
- PKW1 = 1 Reading of required v alue parameter in 32 bit integer format
- PKW1 = 2 Reading of required v alue parameter in 32 bit float format
- PKW1 = 3 Writing of required v alue parameter in 32 bit integer format
- PKW1 = 4 Writing of required v alue parameter in 32 bit float format
2
nd
word (PKW2)
Parameter ID of the configuration data on w hich to perform the operation defined by the PKW1 w ord.
3
rd
word (PKW3)
Most significant part of the processed data (MSW). Only for operation code 3 and 4.
4
th
word (PKW4)
Least significant part of the processed data (LSW). Only for operation code 3 and 4.
Table 4.11 - Structure of PKW message from master to slave
WARNING
For proper operation of the Drive parameterisation protocol, it is recommended that the master continues to send the message until it receives the reply
from the slave. After that, the master can avoid sending the message again.
For the parameters in the list, the parameter value to indicate the selection is given in the relevant parameter tables
in Annex A; namely, it is the value appearing to the side of the description of the selection.
4.13.2 Parameterisation message sent by the slave to the master
This message consists of 4 words as well.
Word
Meaning
1
st
word (PKW1)
Ty pe of operation code:
If the operation requested by the master cannot be admitted, the most significant bit of w ord 1 (PKW1) is set to 1. The error
code is w ritten on w ord 3 (PKW3)
- PKW1 = 1 Reading of required v alue parameter in 32 bit integer format
- PKW1 = 2 Reading of required v alue parameter in 32 bit float format
- PKW1 = 3 Writing of required v alue parameter in 32 bit integer format
- PKW1 = 4 Writing of required v alue parameter in 32 bit float format
2
nd
word (PKW2)
Parameter ID of the configuration data on w hich to perform the operation defined by the PKW1 w ord.
3
rd
word (PKW3)
Most significant part of the processed data (MSW).
If the operation requested by the master cannot be admitted (most significant bit of w ord 1 = 1), the error code is w ritten in this
w ord:
NOTE