Vacon NX OPTC2, User Manual

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modbus vacon • 31
24-hour s358 (0)40 8371 150 • Email: vacon@vacon.com
6
6.2.7
Example messages
Example 1
Write the process data 42001…42003 with command
16
(Preset Multiple Registers).
Command Master – Slave:
ADDRESS 01 hex Slave address 1 hex (= 1)
FUNCTION 10 hex Function 10 hex (= 16)
DATA Starting ddress HI 07 hex
Starting address 07d0 hex (= 2000)
Starting address LO D0 hex
No. of registers HI 00 hex Number of registers 0003 hex (= 3)
No. of registers LO 03 hex
Byte count 06 hex Byte count 06 hex (= 6)
Data HI 00 hex
Data 1 = 0001 hex (= 1). Setting con-
trol word run bit to 1.
Data LO 01 hex
Data HI 00 hex
Data 2 = 0000 hex (= 0). General con-
trol word 0.
Data LO 00 hex
Data HI 13 hex Data 3 = 1388 hex (= 5000), Speed Reference to
50.00% Data LO 88 hex
ERROR
CHECK
CRC HI C8 hex CRC field C8CB hex (= 51403)
CRC LO CB hex
Message frame:
01 10 07 D0 00 03 06 00 01 00 00 13 88 C8 CB
The reply to Preset Multiple Registers message is the echo of 6 first bytes.
Answer Slave – Master:
ADDRESS 01 hex Slave address 1 hex (= 1)
FUNCTION 10 hex Function 10 hex (= 16)
DATA Starting ddress HI 07 hex
Starting address 07d0 hex (= 2000)
Starting address LO D0 hex
No. of registers HI 00 hex Number of registers 0003 hex (= 3)
No. of registers LO 03 hex
ERROR
CHECK
CRC HI F1 hex CRC F101 hex (= 61697)
CRC LO 01 hex
Reply frame:
01 10 07 D0 00 03 F1 01