201 
 
When the feedback signal is less than the detection value set by P14.26 and its time exceeds the time set 
by P14.27, then PID feedback is considered as “loss”. 
 
 
When the feedback signal is greater than the detection value set by P14.28 and its time exceeds the time 
set by P14.29, then PID feedback is considered as “exceeding limit”. 
 
6.15 Communication parameters (Group P15) 
 
0: Modbus protocol 
1: Reserved 
 
 
Fig. 6-70  Setting of communication configuration  
This function is used for selecting parameters for serial communication port and setting according to LED 
bits. 
If the hundreds place of the function code is in MODEM mode, whenever the drive powers up, the 
initialization operation will be performed once for MODEM via RS485 port on the control board, so that 
the MODEM can automatically response after receiving 3 times of ringing signal of telephone line to 
realize the remote control line made up from dial-up line.   
Note: MV300 control board provides RS485 port only. If the communication port of the external 
equipment is RS232, the RS232/RS485 conversion equipment shall be added separately. 
Communication confi
uratio
0~155H 
001
P15.01 
Protocol selectio
0~1 
0
P15.00 
PID feedback exceedin
 limit detection time  0.0~25.0s 
1.0s
P14.29 
PID feedback exceedin
 limit detection value  0.0~100.0%
100.0%
P14.28 
PID feedback lost detection time 0.0~25.0s 
1.0s
P14.27