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5 modbus communication – Delta Electronics Modbus TCP Remote I/O Communication Module RTU-EN01 User Manual

Page 17

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Modbus TCP Remote I/O Communication Module RTU-EN01

DVP-PLC Operation Manual

15

R#

Attribute

Content

Explanation

Default

Latched

6

R/W

RTC 6

Real-time clock

OFF NO

7

R/W

RTC 7

Real-time clock

OFF NO

8

R/W

RTC 8

Real-time clock

OFF NO

9

R/W

RTC 9

Real-time clock

OFF NO

10

R/W

RTC 10

Real-time clock

OFF NO

11

R/W

RTC 11

Real-time clock

OFF NO

12

R/W

RTC 12

Real-time clock

OFF NO

13

R/W

RTC 13

Real-time clock

OFF NO

14

R/W

RTC 14

Real-time clock

OFF NO

15

R/W

RTC 15

Real-time clock

OFF NO

Symbol “R” refers to ready only; “R/W” refers to read and write.

R # 0 : R T C 0

Explanations:

When the RTC function is enabled, and the assigned trigger condition is true, RTU-EN01 will set the bit device R0

to ON and continue to output or stop according to the set time.

R # 1 ~ # 1 5 : R T C 1 ~ 1 5

Explanations:

Please refer to R#0.

5 Modbus

Communication

5.1 Function Codes Supported

Function code

Explanation

Devices supported

0x02

Read digital input point

RX, RY, T, R, C

0x03

Read register

BR, T, C, RCR

0x05

Write single bit device

RY, T, R, C

0x06

Write single register

BR, T, C, RCR

0x0F

Write multiple bit devices

RY, T, R, C

0x10

Write multiple registers

BR, T, C, RCR

0x17

Read/write multiple registers

BR, T, C, RCR

5.2 Exception Codes Supported

Exception code

Explanation

0x01 Illegal

function

0x02

Illegal data address

0x03

Illegal data value

0x04 Slave

device

failure

0x0b

Gateway target device failed to respond.