Foreword   
 
-2- 
 
Table 1 Difference between MD300 and MD320 Functional Modules 
 
  MD320  MD300 
Input/output terminal 
5×DI (bidirectional input 
and one high-speed 
port),2×AI ˈ 2×DO (one 
high-speed port), 1×AOˈ
1×Relay (expandable I/O)
4×DI (single directional input, one 
high-speed port), 2×AIˈ1×DOˈ1×AOˈ
1×Relay
 
Control mode  SVC, VC and V/F  SVC and V/F 
Analog reference 
mode 
Straight line mode 
Multiple-point fold line mode, which is 
easy to realize the functions of the 
injection molding machine 
MS speed 
Be able to realize 16S 
speed 
Be able to realize 4S speed 
Simple PLC 
Be able to realize 16S 
timing operation 
None 
Swing frequency and 
fixed-length control 
Available None 
Main/auxiliary 
reference 
Main/auxiliary reference 
of any channel 
Only A12 can be auxiliary reference 
Communication 
function 
Via the expansion card  Via the specialized card 
PID control  Available  None 
Multiple-point V/F  Available  None 
 
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