Mitsubishi Electric Melservo-J3 Series MR-J3-B, Instruction Manual

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3. CC-LINK COMMUNICATION FUNCTIONS
3.3 Functions
3.3.1 Function block diagram
This section explains the transfer of I/O data to/from the servo amplifier in CC-Link, using function blocks.
(1) Between the master station and servo amplifier in the CC-Link system, link refresh is normally performed at
intervals of 3.5 to 18ms (512 points). The link scan time of link refresh changes with the communication
speed. For details, refer to the CC-Link system master/local unit user's manual.
(2) The I/O refresh and master station sequence program are executed asynchronously. Some programmable
controllers allow link scans to be synchronized with programmable controller scans.
(3) The FROM instruction from the buffer memory of the CC-Link system master/local unit is used to read data
from the servo amplifier, and the TO instruction is used to write data. Some programmable controllers allow
automatic refresh to be set to omit the FROM and TO instructions.
1) QJ61B11N
I/O signal
CPU
Buffer
memory
2) Buffer memory access
3) CC-Link
Ver.1.10-
compliant
cable
Input
Output
Servo amplifier
CC-
Li
nk int
er
face
CC-Link int
erf
ac
e
S
ervo a
m
pli
fier CP
U
P
rogram
m
able co
nt
roller
CPU
In
te
rf
ace wit
h
program
m
able c
on
troller
Programmable controller
CC-Link unit
3.3.2 Functions
The following table lists the functions that may be performed from the programmable controller in the CC-Link
system in the CC-Link operation mode or test operation mode.
Item
Operation mode
CC-Link operation mode Test operation mode
Monitor
Operation
Parameter write
Parameter read
Point table data write
Point table data read