Yokogawa Value Series FX1000 - Manual (Page 187)

6-13
IM 04L21B01-17EN
Specifications
1
2
3
4
5
6
App
Index
Modbus Error Response (Common to Modbus server and Modbus slave)
The FX returns the following error codes to a client or master device.
Code Error Description
1 ILLEGAL FUNCTION
Invalid function code
An attempt was made to execute a function that is not
supported.
2 ILLEGAL DATA ADDRESS
Invalid register number
Failed to access the register.
3 ILLEGAL DATA VALUE
Invalid number of registers
When reading, the specified number of registers was less
than or equal to zero or greater than or equal to 126.
When writing, the specified number of registers was less
than or equal to zero or greater than or equal to 124.
7 NEGATIVE
ACKNOWLEDGE
Invalid contents written
• A lot number that is outside the valid range was
entered.
• Invalid characters (such as ‘¥x1b’) were written in
batch number or free message registers.
• Failed to control the following operations.
• Writing messages
• Writing free messages
• Writing batch numbers and lot numbers
However, no response is returned for the following errors.
• CRC error
• Errors other than those shown above
6.3 Modbus Protocol Specifications