FATEK SD3 Series, Instruction Manual, Page: 373 / 396

11
9
9. Appendices
SD3 Series Instruction Manual
Appendices
1. Absolute System
1. Absolute System
6. Obtaining Absolute Data
Checking Absolute Data using RS-485 Communication
You can check the encoder absolute data using RS-485 Communications or "Servo Studio".
The RS-485 communications enable the host controller to obtain absolute data from the amplifier. To use RS-485
communications, set the following parameters.
Use the Setup Panel or "Servo Studio" for the parameter setup.
Communications Manual: RS-485
RS-485 Communications Setting Parameter No.
Communication
Address
Set the address for RS-485 Communication.
Default: 1
Setting: 1 to 32
4.0
Communication
Switch
Enable or disable RS-485 Communication.
Select "1".
8.0
Minimum
response time
Adjust response timing from the amplifier. Adjust it to satisfy
the communication specification of the host controller.
Default: 3 ms
Range: 0 to 255 ms
11.0
Example of communication commands to obtain absolute data
Transmit data (*) :
24 01 00 11 00 C3 0A 94
Response data :
26 01 80 11 □□ □□ □□ □□ ○○ ○○
*) This example is a command sent to the amplifier at Address 1.
If the command is sent to another amplifier at an address other than Address 1, the error detection
segment in the command is different from this example.
Page 26 Encoder/Rotor mechanical angle (integrated value)
in List of Status Variables
Communications Manual: RS-485
an error detection
segment.
absolute data
unit: encoder pulse
the number of bytes in data: 4 bytes (unsigned)