Nidec Control Techniques Digitax-SF DA21223, Instruction Manual

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11
9
9. Appendices
Digitax SF
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
Digitax SF Connect
.
The RS-485 communications enable the host controller to obtain absolute data from the
drive
. To use RS-485
communications, set the following parameters.
Use the Setup Panel or
Digitax SF Connect
for the parameter setup.
Communications Manual : RS-485
RS-485 Communications Parameter No. Description
Communication
Address
4.0
Set the address for RS-485 Communication.
The initial value: 1
Range: 1...32
Communication Switch 8.0
Enable or disable RS-485 Communication.
Select“１”.
Minimum response time 11.0
Adjust response timing from the
drive
. Adjust it to satisfy the
communication specification of the host controller. The initial
value: 3 [ms]
Range: 0...255 [ms]
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
drive
at Address 1.
If the command is sent to another
drive
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)