Nidec AD3000 User Manual

AD3000 5 – MODBUS TCP
NIDEC ASI S.P.A. – AD3000 COMMUNICATION MANUAL
IMAD30007EN 31
5.5 Errors returned in the Modbus protocol (Modbus exception code)
Except for broadcast messages, when a master (client) device sends a query to a slave (server) device, it expects a response.
If a transmission is not successful, the response contains a code indicating the type of error detected. The codes are listed in the following table.
Code
Name
Meaning
01
ILLEGAL FUNCTION
The function code receiv ed in the query is not an action allowed for the slav e (serv er). If a Poll Program
Complete command has been issued, this code indicates that no program function preceded it.
02
ILLEGAL DATA ADDRESS
The data address receiv ed in the query is not an acceptable address for the slav e (serv er).
03
ILLEGAL DATA VALUE
A v alue contained in the query data field is not an acceptable v alue for the slav e (serv er).
04
SLAVE DEVICE FAILURE
An irrev ersible error occurred w hile the slav e (serv er) w as try ing to perform the requested action.
Table 5.5 - Error codes
5.6 Modbus TCP configuration parameters
Remember that it is necessary to configure all the Ethernet network parameters, ETHERNET - TCP/IP [88.00] family.
The Modbus TCP communication enabling is performed by setting the Modbus En [82.01] parameter.
All the important parameters of the MODBUS [82.00] family are:
82 - Modbus
Id
Name
Description
Unit
Range
Access
Type
Control
Type
Visibility
Level
Download
82.01
Modbus En
Modbus enable
- Off [0]
- RTU [1]
- TCP [2]
- RTU & TCP [3]
#
Def: Off
Read and
Write
All
2
Yes
82.02
Slav e Address
Slav e address
#
Min: 1
Def: 3
Max : 247
Read and
Write
All
2
Yes
82.05
Timeout
Timeout for alarm 53 (0 = disabled)
s
Min: 0
Def: 3
Max : 250
Read and
Write
All
2
Yes
82.07
Mod Ex change Area
In
Selection of input aux iliary ex change
area (from Modbus to Driv e)
- Off [0]
- 1 Data Ex change Area [1]
- 2 Data Ex change Area [2]
#
Def: Off
Read and
Write
All
2
Yes
5.7 Loss of Modbus communication
If the “RTU” communication mode has been chosen, if the communication fails, the system generates the ModbusEr alarm.
The action that shall generate such error is determined by the setting chosen in the Modbus Slave Error [36.53] parameter.
5.8 Control parameterisation via Modbus
The drive configuration parameter setting can be implemented via the Modbus using the PKW parameterisation data of messages exchanged between
master (client) and slave (server) (drive). Such data are used by the Modbus master to transmit or receive slave configuration parameter values;
through PKW data the chosen parameterisation is automatically stored.

Nidec AD3000 Specifications

General

Brand	Nidec
Model	AD3000
Category	DC Drives
Language	English