Delta DVP-ES2 - Manual (Page 451)

3 . I n s t r u c t i o n S e t
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Register Data Descriptions
D1260 Low 00 H
D1261 Low 10 H
Number of Data (count by word)
D1262 Low 79 H CRC CHK Low
D1263 Low 0A H CRC CHK High
Registers for received data (responding messages)
Register Data Descriptions
D0 1234 H PLC stores the value 1234H into D1296
D1 Low 02 H Function
D2 Low 02 H Number of Data (Byte)
D3 Low 34 H
D4 Low 12 H
Content of address
H0500~H0515
D5 Low 2F H CRC CHK Low
D6 Low 75 H CRC CHK High
Analysis of the read status of PLC2 Y0~Y17: 1234H
Device Status Device Status Device Status Device Status
Y0 OFF Y1 OFF Y2 ON Y3 OFF
Y4 ON Y5 ON Y6 OFF Y7 OFF
Y10 OFF Y11 ON Y12 OFF Y13 OFF
Y14 ON Y15 OFF Y16 OFF Y17 OFF
Program Example 2: COM1(RS-232) / COM3(RS-485), Function Code H02
1. Function code K2 (H02): read multiple bit devices. Up to 64 bits can be read.
2. PLC1 connects to PLC2: (M1320 = OFF, ASCII mode), (M1320 = ON, RTU mode)
3. For both ASCII and RTU modes, PLC COM1/COM3 only stores the received data in registers
starting from S, and will not store the data to be sent. The stored data can be transformed and
moved by using DTM instruction for applications of other purposes.
4. Take the connection between PLC1 (PLC COM3) and PLC2(PLC COM1) for example, the
tables below explains the status when PLC1 reads Y0~Y17 of PLC2
z If PLC1 applies COM1 for communication, the below program can be usable by
changing:
1. D1109→D1036: communication protocol
2. M1136→M1138: retain communication setting
3. D1252→D1249: Set value for data receiving timeout
4. M1320→M1139: ASCII/RTU mode selection
5. M1316→M1312: sending request
6. M1318→M1314: receiving completed flag