SPC-300 Protocol

SPC-300 communication driver is the driver to communicate with SPC-300 / SPC-10 / FARAn PLUS PLC of Samsung in Korea.

1. Read settings

SPC-300 input/output memory are arranged automatically by PLC, as in order left to right.

Communication DEVICE format is different, according to switch settings installed at SPC-300 PLC.

Refer to SPC-300 manual about switch settings for communication speed, etc.

SPC-300's read schedule

Read schedule setting parameters are as follows:

1) STATION - STATION value which is set at PLC. ( If you use single PLC, you just set as 255. But if you use several PLC by using 485 communication, you have to designate Station value except 255 for communication.)

2) Card Type - Card type of DI, AI and etc.

3) Address - Memory address.

4) Save Start Address for Communication Server - Saving start address of Communication Server.

5) Read Size - The number of WORD to read.

READ schedule example)

READ,  255,  DI,  0,   0,   2,

READ,  255,  DI,  2,   2,   2,

READ,  255,  DO,  4,  4,   2,

READ,  255,  AI,  6,   50,  4,

READ,  255,  AI,  8,   54,  4,

Digital input/output card are composed as 1 WORD per 16 channels, and analog input card is composed of 2 WORDs(real value + channel). So, address just increases as 2 WORDs at analog input.

You can read the value at AUTOBASE main program by creating program which changes analog channel for reading analog value at PLC-LADDER program.

2. Writing settings

Write to direct address of PLC, regardless of SCAN File.

Digital Write

Digital write setting parameters are as follows :

1) PORT : Installed PORT number.

2) STATION : STATION number of SPC-300.(0~191 or 255)

3) ADDRESS : Output address.(Use WORD absolute address)

Write example)

PORT : 0 STATION:1  ADDRESS:0003

If you set as above, you can control(ON/OFF) no.3 bit of no.0 WORD of R part connected with no.1 STATION of SPC-300.

Analog Write

Analog write setting parameters are as follows :

1) PORT : Installed PORT number.

2) STATION : STATION number of SPC-300. (0~191 or 255)

3) ADDRESS : Output address. (Use WORD absolute address)

Write example)

PORT : 0 STATION: 255   ADDRESS:0192

If you set as above, you can change no.0 WORD value of M part connected with no.255 Station of SPC-300.

Notice : Use absolute address in case of doing writing by using SPC-300 protocol. Area classification of R or M area is classified by address.

   For example, if you want to output to M0000, set the address value as 1920. (Refer to manual)

3. Communication cable connection and switch settings

Be careful, because RS-232 communication cable connection is not general.

< SPC-300 RS-232 cable connection >

Switch settings are as follows. (Notice : Downward direction is ON)