FANOX SIL-V, User Manual, Page: 164 / 212

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8.3. Exemptions an error answers
The error codes defined by the ModBus protocol are as follows:
01 ILLEGAL FUNCTION
The slave does not support any function with the function code
received in this message.
02 ILLEGAL DATA ADDRESS The master is trying to do an operation in a wrong address.
03
ILLEGAL DATA VALUE
The slave has detected that the value sent by the master is not
valid.
04 SLAVE DEVICE FAILURE
Indicates an error occurred in the slave while trying to execute the
request of the master.
05
ACKNOWLEDGE Generic recognition.
06 SLAVE DEVICE BUSY The slave is busy and unable to perform the required operation.
07
NEGATIVE ACKNOWLEDGE Generic non-recognition.
8.4. Data type
Type Length Description
UCHAR 1/2 Integer without sign of 1 byte
BYTE 1/2 Integer with sign of 1 byte
BIT16 1
Gathered bits type, groups of 16.
E. g.: 0x1A41 = 0001101001000001b
BIT32 2 Gathered bits type, groups of 32.
ENUM 1
Integer without sign of 16 bits. Each of the values that the integer can be
will have a correspondence in the auxiliar list of the database. I this list is
the correspondence chain which must be shown for each of the values.
Memory will only receive an integer value.
E. g.: 0, 1 Correspondence to “CLOSED”, “OPEN”
DENUM 2 Integer without sign of 32 bits
UINT 1 Integer without sign of 2 bytes
INT 1
Integer with sign of 2 bytes
LONG 2
Integer without sign of 4 bytes
DWORD 2 Integer with sign of 4 bytes
FLOAT 2
Number in floating decimal point “Float” of 4 bytes
ASCIIxx xx/2
Stri
ng: In length variable character chain. Final of String marked with ‘\0’.
E. g.: “ABC” 0x41x42x43x00....