Vacon 100 INDUSTRIAL - Example 3 - Exception Response

6
vacon • 44 Communications
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Reply frame:
6.5.3 Example 3 - Exception response
In an exception response, the Slave sets the
most-significant bit (MSB) of the function code to 1.
The Slave returns an exception code in the data field.
Command Master - Slave:
Message frame:
Exception response:
Answer Slave - Master:
Reply frame:
Table 43.
01 04 04 13 88 09 C4 78 E9
Table 44.
ADDRESS 01 hex Slave address 1 hex (= 1)
FUNCTION 04 hex Function 4 hex (= 4)
DATA
Starting address HI 17 hex
Starting address 1770 hex (= 6000)
Starting address LO 70 hex
No. of registers HI 00 hex
Invalid number of registers 0005 hex (= 5)
No. of registers LO 05 hex
ERROR
CHECK
CRC HI 34 hex
CRC field 3466 hex (=13414)
CRC LO 66 hex
Table 45.
01 04 17 70 00 05 34 66
Table 46.
ADDRESS 01 hex Slave address 1 hex (= 1)
FUNCTION 84 hex Most significant bit set to 1
DATA
Error
code
04 hex Error code 04 => Slave Device Failure
ERROR
CHECK
CRC HI 42 hex
CRC field 42C3 hex (= 17091)
CRC LO C3 hex
Table 47.
01 84 04 42 C3