Nidec AD3000 User Manual

AD3000 5 – MODBUS TCP
NIDEC ASI S.P.A. – AD3000 COMMUNICATION MANUAL
IMAD30007EN 27
5.4.1 Function codes
The table below shows the function codes available on the AD3000 drive.
Code
(decimal)
Function
Description
01
Reads Coils
Reading of one or more contiguous bits
03
Read Holding Registers
Reading of one or more contiguous Holding Registers
05
Write Single Coil
Writing of one bit
06
Write Holding Registers
Writing of only one Holding Register (single)
15
Write Multiple Coil
Writing of one contiguous group of bits
16
Write Holding Registers
Writing of one group of Holding Registers (multiple)
20
Read File Record
Reading of string parameter
21
Write File Record
Writing of string parameter
Table 5.2 - Available function codes
5.4.2 Read holding register
The function code “Read Holding Register” reads the binary contents of maintenance registers (4XXXX references) in the slave (server). The broadcast
message is not supported.
All process data can be read by using 4+ID number as a Modbus address.
For example, to read Status Wd 1 [52.01] process data, the address will be 45201. For the data scaling refer to chapter 8 of the Programming
Manual.
Note: for some types of masters (client) it may not be necessary to place the number 4 before the ID and/or it may be necessary to set an address
incremented or decremented by 1 with respect to the value of the ID.
5.4.3 Write holding register
The function code “Write Holding Register” writes the binary contents of maintenance registers (4XXXX references) in the slav e. The broadcast
message is not supported.
The process data that can be written is listed in the following table, where the addresses are number 4+ID.
For example, to write Ext Cmd Wd 1 [51.02] process data, the address will be 45102. For the data scaling refer to chapter 8 of the Programming
Manual.
Note: for some types of masters (client) it may not be necessary to place the number 4 before the ID and/or it may be necessary to set an address
incremented or decremented by 1 with respect to the value of the ID.
Write Holding Register
Modbus Register
Parameter
Description
Unit
Minimum Value
Maximum Value
45102
Ex t Cmd Wd 1
Command w ord 1
-
-
-
45103
Ex t Cmd Wd 2
Command w ord 2
-
-
-
45105
Ex t Cmd Wd 4
Command w ord 4
-
-
-
45301
Torque Ffw
Torque feedforw ard
pu
-32768 @ -4.0 pu;
32767 @ 4.0 pu
45302
Torque Ref
Torque reference
pu
-32768 @ -4.0 pu;
32767 @ 4.0 pu
45303
PosTrq Lim Ref
Positiv e limit of torque reference
pu
-32768 @ -4.0 pu;
32767 @ 4.0 pu
45304
NegTrq Lim Ref
Negativ e limit of torque reference
pu
-32768 @ -4.0 pu;
32767 @ 4.0 pu
46001
Ex tMain Spd Ref
Main speed reference
pu
-32768 @ -2.0 pu
32767 @ 2.0 pu
46002
Ex tAux Spd Ref
Aux iliary speed reference
pu
-32768 @ -2.0 pu
32767 @ 2.0 pu
46004
Add Spd Ref
Additional speed reference
pu
-32768 @ -2.0 pu
32767 @ 2.0 pu
46005
Spd Ffw
Speed feedforw ard
pu
-32768 @ -2.0 pu
32767 @ 2.0 pu
46316
PrsPID Ref 1
Reference 1 for Process PID
pu
-32768 @ -2.0 pu
32767 @ 2.0 pu
46317
PrsPID Fdb 1
Feedback 1 for Process PID
pu
-32768 @ -2.0 pu
32767 @ 2.0 pu
46318
PrsPID Ref 2
Reference 2 for Process PID
pu
-32768 @ -2.0 pu
32767 @ 2.0 pu

Nidec AD3000 Specifications

General

Brand	Nidec
Model	AD3000
Category	DC Drives
Language	English