6. MODBUS REGISTERS
6 - 1
6. MODBUS REGISTERS
Each data such as control parameters, command values, and feedback values is handled as an object
composed of an address, object name, data type, access rule, and other elements. The object data can be
exchanged between the client (controller) and the servers (servo amplifiers).
6.1 List of registers
Address
Name and function
Data
type
Read/
write
Initial value
Range
Unit
Saved
to EEP-
ROM
Para-
meter
No. of
Points/
No. of
Registers
Continuous
read/
continuous
write
1000 Supported profile information (Device Type)
The servo drive defined with the CiA 402
profile is indicated.
4
bytes
Reading 00020192h 00020192h
(fixed)
2
Impossible
1001 Alarm information (Error Register)
The error occurrence is returned.
Bit 0: Turns on when an alarm has occurred.
Bit 1 to Bit 7: Unused
1
bytes
Reading
00h
to
01h
1
Impossible
1010 Writing command to EEP-ROM (Store
parameters)
The number of entries is returned.
1
bytes
Reading 1
01h
3
Impossible
Saving all parameters (Save all parameters)
[Writing]
Writing "save" (= 65766173h) saves all the
objects which can be stored in the EEP-ROM.
[Reading]
Bit 0: 0: The parameter cannot be saved with
the command. (A parameter is being
saved.)
1: The parameter can be saved with the
command. (No parameter is being
saved.)
Bit 1: 0: The parameter is not automatically
saved.
4
bytes
Read/
write
00000001h
1011 Restoring default EEP-ROM parameters
(Restore default parameters)
The number of entries is returned.
1
bytes
Reading 1 01h
(fixed)
3
Impossible
Restoring all default parameters (Restore all
default parameters)
The parameter of the servo amplifier can be
rewritten with the factory setting.
When "64616F6Ch" (= reverse order of ASCII
code of "load") is written to Restore all default
parameters (1011h: 1) and the power is cycled,
the parameter is initialized.
4
bytes
Read/
write
00000001h
1018 Device information (Identity Object)
The number of entries is returned.
1
bytes
Reading 4 04h
(fixed)
9
Impossible
Vendor ID (Vendor ID)
The vendor ID of a servo amplifier is returned.
4
bytes
Reading 00000002h 00000002h
(fixed)
Product number (Product Code)
The servo amplifier serial number is returned.
4
bytes
Reading 00001003h 00001003h
(fixed)
Revision number (Revision Number)
The revision number of a servo amplifier is
returned.
4
bytes
Reading 00000000h
to
FFFFFFFFh
Serial number (Serial Number)
The serial number of the network module is
returned.
4
bytes
Reading 00000000h 00000000h
to
FFFFFFFFh
2001
to
2021
PA01 to PA32
The values of the basic setting parameters
([Pr. PA_ _ ]) can be obtained and set.
For details, refer to "MR-JE-_C Servo Amplifier
Instruction Manual".
4
bytes
Read/
write
PA01
to
PA32
2 Possible
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