10 - 30 10 - 30
MELSEC-Q
10 DEVICES
(2) Using link registers in a network system
In order to use link registers in the network system, network parameter settings
must be made.
Link registers not set in the network parameter settings can be used as data
registers.
REMARK
1) For details on network parameters, refer to the Q Corresponding MELSECNET/H
Network System Reference Manual.
10.2.14 Link special registers (SW)
(1) Definition
(a) Link special registers are used to store data on the communication status
and errors of an intelligent function
(b) Because the data link information is stored as numeric data, the link special
registers serve as a tool for identifying the locations and causes of faults.
(2) Number of link special register points
There are 2048 link special register points from SW0 to SW7FF. The link special
register points are assigned at the rate of 512 points per intelligent function
module, such as a MELSECNET/H network module.
By default, the following points are assigned for link registers as shown below.
For the 1st network module
For the 2nd network module
For the 3rd network module
For the 4th network module
SW200
SW3FF
SW400
SW5FF
SW600
SW7FF
SW0
SW1FF
Link special register
512 points
512 points
512 points
512 points
2048 points
REMARK
For details on link special registers used in the QCPU, refer to the QCPU(Q
mode)/QnACPU Programming Manual (Common Instructions).