FATEK FBs-3SSI Synchronous Serial Interface Module Instructions

Synchronous Serial Interface Module

FBs-3SSI is one of the special function modules of FATEK FBs series PLC. By applying the FBs-3SSI module, the FBs PLC can read out the position data generated by the absolute position sensing device which has the Synchronous Serial Interface (SSI). SSI interface is driven by the digital differential signal which can reduce the possibility of error occurrences caused by the interference of electric noise.

Specifications of FBs-3SSI Synchronous Serial Interface Module

FBs-3SSI Synchronous Serial Interface Module

The Procedures of Using FBs-3SSI Synchronous Serial Interface Module

Start

Connects FBs-3SSI to the expansion interface on PLC in series and connects an external 24VDC source and load cell measure input wires.

Execute the WinProladder and configure the 3SSI configuration table address and the data register in 3SSI configuration windows, then you can read the measurement value form register directly.

The Procedures of 3SSI Module

Click the item “I/O Configuration” which in Project Windows：

Once the setting page displayed, is able to measure the 3SSI module.

1. ﹝Starting Address of Configuration Table﹞：
   The content of 3SSI configuration requires 4 consecutive registers; please enter the configuration registers for this purpose in the first register. Assign a starting register value to store the 3SSI configuration table, there will allow the following inputs:
   RXXXX or DXXXX
   The configuration table only occupies 3+N of registers, where N is the number of 3SSI modules.
   As shown in the above example, R5000~ R5003 stores the 3SSI configuration table.

2. ﹝Starting Address of Data Register﹞：
   3SSI module reads the position sensor requires 6 consecutive data registers; please enter the configuration registers for this purpose in the first register.
   Assign a data register to store the current 3SSI reading values, there will allow the following inputs, RXXXX or DXXXX 1 set of sensor reading occupies 2 registers
   As shown in the above example, the reading value of the first sensor stores to DR0, the second sensor stores to DR2, and the third sensor stores to DR4
   Notes: The above two settings can be used in all 3SSI modules. If there is line broken happened, the broken value 40000000H will be displayed.
   【3SSI installation information and setup】

3. ﹝Module #1 ~ #4﹞：
   Display the name of the installed module and the analog starting address of its own

4. ﹝Bit Size﹞：It means the sensor’s data bit size. The input range is 12~32.
   Please note that,no matter the bit size is less than or equal to 16, each channel occupies 2 registers.

5. ﹝Code﹞：Sensor output encoding format. Can choose GRAY (GRAY code) or BINARY (binary code). You must correctly select the corresponding output coding format because from that, it then can obtain the correct value from the register.

6. ﹝Signed﹞：Sensor output data with or without positive or negative sign. If the sensor output with positive sign then select YES, with negative sign then select NO. Usually is NO.

 I/O Addressing of 3SSI Module

By the time domain multiplexing design method, each 3SSI module occupies 1 point of input register and 8 points of digital output for I/O addressing. For correct I/O access, the I/O addressing of extension modules following the 3SSI module must be added the I/O quantity which the corresponding module should have. The WinProladder provides an easy and convenient way to calculate the I/O address for the extension modules through the on-line “I/O Numbering” operation.

3SSI Module outline and signal description

Wiring of 3SSI Module

PLC1.ir

Documents / Resources

| FATEK FBs-3SSI Synchronous Serial Interface Module [pdf] Instructions
FBs-3SSI Synchronous Serial Interface Module, FBs-3SSI, Synchronous Serial Interface Module, Serial Interface Module, Interface Module, Module
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