RMS Technologies R325 DRIVER W/PDT User Manual
Page 21

RMS Technologies
Page 21
Version 1.20
R325IE Single Axis Controller/Driver Manual
02/13/2006
Command
(Case Sensitive)
Operand
Example
Description
MISC
PF 0, 1, 2, 3
#ACD1 
 
Sets Mixed 
Mode damping 
to 15% 
Percent Fast Decay - Command or Query 
Default = 2 
- Allows the Damping Mode of the driver IC to be set. 
0 = Fast Decay 
1 = Mixed Mode 15% 
2 = Mixed Mode 48% 
3 = 100% 
The optimum setting will vary with motor inductance and step 
rate; however the default ‘Mixed Mode’ setting will work well with 
almost all motors. 
MICROSTEPPING
SR 1, 2, 4, 8, 16,
32, 64, 128, 
256 
#ASR4 
 
Sets the step 
resolution to 4x 
Step Resolution - Command or Query 
Default = 16 
- Reads or sets the current step resolution 
Allowed values are: 
256 for 256x 
128 for 128x 
64 for 64x 
32 for 32x 
16 for 16x 
8 for 8x 
4 for 4x 
2 for 2x 
1 for 1x 
QUERY COMMANDS
FR -
#AFR
Firmware Revision - Query Only 
- Returns 3 digit part code followed by 3 digit firmware revision 
value. 
 
Reply 
*AFR325100 //R325 firmware revision 1.00 
MA 65 - 90
#AMA88 
 
Sets the unit 
address to 88 
(‘X’) 
My Address - Command or Query 
Default = 65 
- Reads or sets the unit address. The value read or entered is the 
decimal value of the ASCII character designated as the unit 
address. (65 = ‘A’ and 90 = ‘Z’) 
The change to a new address is immediate, in that the command 
response will use the new address 
RS -
#ARS 
 
Reads the 
switch inputs 
Read Switches - Query Only 
- Reads the TRUE (1) or FALSE (0) state of the three optically 
coupled inputs, combined into a single three-bit value. This 
command is used to check the correct operation of this interface. 
- The value order of the inputs is ‘Direction’, ‘Disable’, and ‘Step’; 
in descending order. 
‘Direction’ has the value 4 (100) 
‘Disable’ has the value 2 (010) 
‘Step’ has the value 1 (001) 
 
TI -
#ATI 
 
Reads the 
switch inputs 
Test Inputs - Query Only 
Step, Direction, and Disable all return a value in decimal form. 
The value order of the inputs is: 
‘Direction’, ‘Disable’, and ‘Step’; in descending order. 
 
‘Direction’ has the value 4 (100) 
‘Disable’ has the value 2 (010) 
‘Step’ has the value 1 (001) 
 
Reply 
*ATI3 // 3 = ‘011’ 
 
 
