3. Modbus/TCP
3 - 2
3.3 Function List
Functions that can be implemented are as follows. Operation and maintenance of the servo amplifier can be
performed remotely.
Function
Description
Detailed explanation
Status monitor
Reads the items in "Display all", the monitor function of MR Configurator2,
such as the servo motor speed and droop pulses.
Section 7.3
Parameter setting
Reads and writes data from/to parameters.
Point table setting
Reads and writes point table data.
Current alarm read
Reads alarm numbers that currently exist.
Alarm history read
Reads the history of up to 16 alarms.
Parameter error number read
Reads the parameter number at occurrence of a parameter error.
Point table error number read
Reads the point table number at occurrence of a point table error.
I/O monitor
Reads the ON/OFF state of external I/O signals and the status of the I/O
devices
Section 7.4.5
Section 7.4.6
Section 7.4.7
Servo amplifier information read Reads the servo amplifier model and software version.
Section 7.4.1
Section 7.4.3
Motor drive
By accessing to holding registers which are assigned like the address
assignment of CiA 402 drive profile, the servo motors are driven.
"MR-JE-_C Servo
Amplifier Instruction
Manual (Profile
Mode)"/"MR-JE-_C
Servo Amplifier
Instruction Manual
(Positioning Mode)"
3.4 Outline of Modbus/TCP protocol
POINT
If connection with a client disconnects during establishment, the connection may
not close and this may cause reconnection failure. In case you cannot
reconnect, cycle the power of the servo amplifier.
In Modbus/TCP communication, a command that a client (controller) sends to servers (servo amplifiers) is
called "Query Message", and a command that the servers return to the client is called "Response Message".
When a servo amplifier receives a Query Message, it returns a Response Message to the client after the
servo amplifier response time.
In Modbus/TCP communication, as in the case of TCP/IP, make sure to establish the connection before
sending and receiving commands. Check that the connection has been established, and then send a Query
Message.
Client (controller)
Server (servo amplifier)
Query Message
Response Message
Servo amplifier response time (Note)
Query Message
Response Message
Note. The servo amplifier response time differs depending on the command to send.
Summary of Contents for MR-JE-C Series
Page 9: ...A 8 MEMO ...
Page 13: ...4 MEMO ...
Page 33: ...2 CC Link IE Field Network Basic SLMP 2 16 MEMO ...
Page 73: ...5 PARAMETERS 5 14 MEMO ...
Page 79: ...6 MANUFACTURER FUNCTIONS 6 6 MEMO ...
Page 143: ...MEMO ...