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Chapter 14  Common Functions
 
14.7 Amplifier-less operation function 
The positioning control of Simple Motion module without servo amplifiers connection 
can be executed in the amplifier-less function. This function is used to debug of user 
program or simulate of positioning operation at the start. 
 
The details shown below explain about the "Amplifier-less operation function". 
[1] Control details 
[2] Restrictions 
[3] Buffer memory list 
[4] Operation mode switching procedure 
 
[1]  Control details 
Switch the mode from the normal operation mode (with servo amplifier 
connection) to the amplifier-less operation mode (without servo amplifier 
connection) to use the amplifier-less operation function. 
Operation for each axis without servo amplifier connection as the normal 
operation mode can be executed during amplifier-less operation mode. The start 
method of positioning control is also the same procedure of normal operation 
mode. 
The normal operation (with servo amplifier connection) is possible by switching 
from the amplifier-less operation mode to the normal operation mode after 
amplifier-less operation. 
The current value management (current feed value, machine feed value) at the 
switching the normal operation mode and amplifier-less operation mode is shown 
below. 
 
"Absolute position 
detection system (PA03)" 
Current value management at the operation mode switching 
Normal operation mode 
 
Amplifier-less operation mode 
Amplifier-less operation mode 
 
Normal operation mode 
"0: Disabled" 
The current feed value and machine feed 
value are "0". 
The current feed value and machine feed 
value are "0". (At the communication start to 
the servo amplifiers) 
"1: Enabled" 
The amplifier-less operation mode starts with 
the address that the servo amplifier's power 
supply was finally turned OFF. 
However, the OP position is not established in 
the normal operation mode, the current feed 
value and machine feed value are "0". 
The current feed value and machine feed 
value are restored according the actual 
position of servomotor. (At the communication 
start to the servo amplifiers) 
However, when the OP position is not 
established in the normal operation mode 
before switching to the amplifier-less operation 
mode, the current feed value and machine 
feed value are not restored. Execute the OPR.
When the mode is switched to the normal 
operation mode after moving that exceeds the 
range "-2147483648(-2
31
) to 2147483647(2
31
-
1) [PLS]" from the actual position of servo 
motor during amplifier-less operation mode, 
the current feed value and machine feed value 
might be not restored correctly.