Write One Word; Write N Words - JUMO LOGOSCREEN nt Interface Description

4.6.4 Write one word

Instruction
Response
Example

4.6.5 Write n words

Instruction
Response
Example
For the "Write one word" function, the data blocks for instruction and
response are identical.
Slave Function
address 0x06
1 byte 1 byte
Slave Function
address 0x06
1 byte 1 byte
Set the variable "External binary In 1" (Modbus address 0x1638) to 1.
For addresses, see Chapter 7.1 Modbus addresses for important device and
process data, page 43.
Instruction:
01 06 1638
Response (as instruction):
01 06 1638
Slave Funct-
address ion
0x10
1 byte 1 byte
Slave Function
address 0x10
1 byte 1 byte
Write the word "Test" (ASCII coding: 0x54 0x65 0x73 0x74 0x00) to the
address 0x148 ff, so that this text is entered in the event list for group 1:
Instruction:
01 10 148A
Response:
01 10 148A
4 Modbus protocol description
Word
address
2 bytes
Word
address
2 bytes
0001 CD8F
0001 CD8F
Address Number
of first of words
word
2 bytes 2 bytes
Address
of first
word
2 bytes
0003 06
0003 A412
Word value Checksum
2 bytes
Word value Checksum
2 bytes
Number Word
of bytes value(s)
1 byte x byte(s)
Number Checksum
of words
2 bytes
54 65 73 74 00 00
CRC16
2 bytes
CRC16
2 bytes
Check-
sum
CRC16
2 bytes
CRC16
2 bytes
9BFA
21