6-15
TI71M01D06-01EN 3rd Edition: 2012.12.01
6.1.2 I/O Registers
I/O registers are provided in addition to I/O contact signals in the CC-Link interface. The I/O
registers can be used for the functions specific to the CC-Link interface. (See Section 6.10,
"Special Functions of CC-Link.")
(1) Configuration of I/O Registers
The remote registers (M
→
R, M
←
R) of a CC-Link master station are directly connected with
soft registers (input, output) that are virtual registers on the drive. However, unlike the I/O
contact signals, their assignments cannot be changed. The number of registers varies with
the number of occupied stations. Each register is 16-bit long.
Number of I/O registers
Number of input registers
Number of output registers
Remote register
Soft register
With 1 occupied station
4 points
4 points
With 2 occupied stations
8 points
8 points
Relationship between remote registers and soft registers
[Remote register M
→
R]
[Soft register inputs]
[Remote register M
←
R]
[Soft register outputs]
Remote register M
→
R
RWw(n+*)
CC-Link interface chip
Remote register M
←
R
RWw(n+*)
Soft register inputs
Soft registers
Soft register outputs
Internal CPU processing
Internal drive con
trolle
r
DrvPIII
With 1 occupied
station
Signal abbreviation
With 2 occupied
stations
With 1 occupied
station
With 2 occupied
stations
Block No.
Signal abbreviation
Block No.