Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 369)

7 Application Instructions API 50-99
D V P - P L C A P P L I C AT I O N M A N U A L 7-85
MOV D1120 H86
M1002
SET M1120
SET M1122
MOV D1129 K100
X10
M1123
RST M1123
RS D100 K8 D120 K8
SET M1161
Process of received data
Set up communication protocol 9600,7,E,1
Retain communication protocol
Set up communication time-out 100ms
8-bit mode
Sending request
pulses
Write in data to be transmitted in advance
Set up sending request
Receiving of data is completed.
The flag is reset.
PLC Ö VFD-B, PLC sends: 01 06 2000 0012 02 07
VFD-B Ö PLC, PLC receives: 01 06 2000 0012 02 07
Registers for sent data (PLC sends out messages)
Register Data Explanation
D100 low 01 H Address
D101 low 06 H Function
D102 low 20 H
D103 low 00 H
Data address
D104 low 00 H
D105 low 12 H
Data content
D106 low 02 H CRC CHK Low
D107 low 07 H CRC CHK High
Registers for received data (VFD-B responds with messages)
Register Data Explanation
D120 low 01 H Address
D121 low 06 H Function
D122 low 20 H
D123 low 00 H
Data address
D124 low 00 H
D125 low 12 H
Data content
D126 low 02 H CRC CHK Low
D127 low 07 H CRC CHK High
Remarks:
1. Flags for the RS-485 communication of RS/MODRD/MODWR/FWD/REV/STOP/RDST/RSTEF/MODRW
instructions