DVP-ES2/EX2/EC5/SS2/SA2/SX2/SE&TP Operation Manual - Programming
ASCII mode (COM3: M1320 = OFF, COM1: M1139 = OFF):
When X0 = ON, MODRW instruction executes the function specified by Function Code 06
PLC VFD-B, PLC sends: “01 06 2000 1770 52”
VFD-B PLC, PLC receives: “01 06 2000 1770 52”
(No data processing on received data)
RTU mode (COM3: M1320 = ON, COM1: M1139 = ON)
When X0 = ON, MODRW instruction executes the function specified by Function Code 06
PLC VFD-B, PLC sends: “01 06 2000 1770 8C 1E”
VFD-B → PLC, PLC receives: “01 06 2000 1770 8C 1E”
(No data processing on received data)
Program Example 9: COM2 (RS-485), Function Code H0F
1. Function code K15 (H0F): write in multiple bit devices. Up to 64bits can be written.
2. PLC1 connects to PLC2: (M1143 = OFF, ASCII Mode), (M1143 = ON, RTU Mode)
3. For ASCII or RTU mode, PLC COM2 stores the data to be sent in D1256~D1295 and the
received data in D1070~D1085.
4. Take the connection between PLC1 (PLC COM2) and PLC2 (PLC COM1) for example, the
tables below explain the status when PLC1 force ON/OFF Y0~Y17 of PLC2.
Set value: K4Y0=1234H
H87MOV
M1002
D1120
SET M1120
K100
MOV
D1129
RST
M1127
Set communication protocol as 9600, 8, E, 1
Retain communication protocol
Set receiving timeout as 100ms
MODRW K15K1
X0
H0500 D0 K16
Connection device
address: K1
Function code: K15
Write in multiple bit devices
Data address: H0500
Data storing register
Data length(bit)
Processing received data
ASCII mode: The received data is stored in in ASCII format. D1070~D1085
RTU mode: The received data is stored in D1070~ in Hex format.D1085
Reset M1127
M1127
SET
X0
M1122
Sending request
M1143 = OFF
ASCII mode
RST
M1143
M1143 = ON
RTU mode
SET
M1143
Receiving completed