407
By the USB programming port, the project is written into the Master PLC.
Master PLC
VS1-32M R
X0 1 2
3 4
5
6 7
10
21 22
23
RUN
ERR
Y0 1 2
3 4
5
6 7
10
11 12
13
PWR
20
11 12
13
14
15 16
17
DC2 4V
INP UT
STOP
MC
RUN
VSPC-200A
USB
Ladder Master S
④ When the example is performing, the data at every PLC will follow its own program and the communication table
to execute the operation below.
The left PLC (Master): According to the format of the “VS Protocol” to edit the program using the RS instruction.
The PLC Master reads the value of D1 at the right side Slave #1 via the communication and stores
the value to the Master’s D111.
Also, writes the content value of the Master's D110 to the D0 of Slave #1.
③ After sequentially edit and load the projects to those PLCs, do the wiring and testing jobs between two PLC’s.
The right PLC (Slave #1): The content value of D0 is sent to its output points Y0~Y7.
Also, its content value of D0 will be added 100 up and stored to the D1.
Since the left PLC (Master) is based on the format of the “VS Protocol” to edit the program with the RS instruction,
that can use the communication to access the data at the Slave #1. The operation produces the following results.
1. The content value of the Master's D110 is output to the points Y0~Y7 of the Slave #1.
2. The content value of the Master's D111 equals to the sum of the content value of its D110 and 100.
Try to change the content value of the left Master PLC's D110 and observe the changes of the content value of
D111, also the output points Y0~Y7 at the right PLC Slave #1 are related to the value.
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