Delta DVP-ES2/EX2/SS2/SA2/SX2/SE COM2 COM1 COM3, Program Example 3 COM2 RS-485, Function Code H03

3. Instruction Set

PLC data receiving register:

Register	Data			Descriptions
D0	1234 H	PLC converts the data in address 0500H ~ 0515H and stores the
		converted data automatically.
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

5.Relative flags and data registers when COM1 / COM2 / COM3 works as Master:

	COM2	COM1	COM3	Function
	M1120	M1138	M1136	Retain communication setting
COM.	M1143	M1139	M1320	ASCII/RTU mode selection
setting
	D1120	D1036	D1109	Communication protocol
	D1121	D1121	D1255	PLC communication address
Sending	M1122	M1312	M1316	Sending request
request
	D1129	D1249	D1252	Set value for data receiving timeout (ms)
Receiving	M1127	M1314	M1318	Data receiving completed
completed
	-	M1315	M1319	Data receiving error
	-	D1250	D1253	Communication error code
	M1129	-	-	Receiving timeout
Errors	M1140	-	-	Data receiving error
	M1141	-	-	Parameter error. Exception Code is stored in
				D1130
	D1130	-	-	Error code (Exception code) returning from
				Modbus communication

Program Example 3: COM2 (RS-485), Function Code H03

1.Function code K3 (H03): read multiple Word devices. Up to 16 words can be read. For COM2 ASCII mode, only 8 words can be read.

2.For ASCII or RTU mode, PLC COM2 stores the data to be sent in D1256~D1295, converts the received data in registers starting from S, and stores the converted 16-bit data in D1296 ~ D1311.

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