Adtech iMASTER – A1 Series - Page 164

A1-User’s Manual
１６０
1) RXP / PXN / Connector
 RXP: + Transmit/Receive Port
 RXN: - Transmit/Receive Port
Program A1 Parameters to enable remote control
Code
Minimum
Maximum
Initial
Value
Unit
Description
'50.01'
1
32
1
-
Modbus node ID
'50.02'
0
4
0
-
9600bps
2) RS485 Interface Description
Item
Description
Remark
Interface
Communication method
Communication speed
Communication code
Data bits
Parity
Stop bit
Starting method
Wait time
Connection type
Error check
RS485
Half duplex
9600
Binary code
8
No.
1
External request
10∼1000ms
1 : N (Max32)
Frame / CRC / CMD /
MAXREQ / parameter
Fixing
Fixing
Fixing
Fixing
VFD is only slave part.
Communication number is
selected at '50.01'
Communication sequence
The communication sequence is as follows
External Contorller
A1-VFD
Frame 1
Frame 2
Wait time
(Within 5ms )
 Frame Start: Frame start is recognized by signal line data transmitted
 Frame Complete: Frame completion is recognized by no data during
4, 5-character time
 Frame 1: Transmit from external controller to VFD
 Frame 2: Indication reflects from VFD to external controller