DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming
Program Example 3: COM2 RS-485
1. Connect PLC to VFD-B series AC motor drives (AC motor drive in ASCII Mode; PLC in 16-bit
mode and M1161 = OFF).
2. Write the data to be sent into registers starting from D100 in advance in order to read 6 data
starting from address H2101 on VFD-B
M1002
Set up communication protocol as
MOV H86 D1120
9600,7,E,1
SET
M1120
Retain communication protocol
Pulse for
sending request
X0
Receiving
completed
M1123
MOV K100 D1129 Set up communication time-out as 100ms
Write transmitting data in advance
SET M1122 Sending request
RS D100 K17 D120 K35
Processing received data
RST M1123 Reset M1123
PLC VFD-B, PLC sends “: 01 03 2101 0006 D4 CR LF “
VFD-B PLC, PLC receives “: 01 03 0C 0100 1766 0000 0000 0136 0000 3B CR LF “
Registers for sent data (PLC sends out messages)
Register Data Explanation
D100 low ‘: ’ 3A H STX
D100 high ‘0’ 30 H ADR 1
D101 low ‘1’ 31 H ADR 0
Address of AC motor drive: ADR (1,0)
D101 high ‘0’ 30 H CMD 1
D102 low ‘3’ 33 H CMD 0
Instruction code: CMD (1,0)
D102 high ‘2’ 32 H
D103 low ‘1’ 31 H
D103 high ‘0’ 30 H
Start data address
D104 low ‘1’ 31 H
D104 high ‘0’ 30 H
D105 low ‘0’ 30 H
D105 high ‘0’ 30 H
Number of data (counted by words)
D106 low ‘6’ 36 H
D106 high ‘D’ 44 H LRC CHK 1
D107 low ‘4’ 34 H LRC CHK 0
Error checksum: LRC CHK (0,1)
D107 high CR D H
D108 low LF A H
END
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