Yaskawa GPD 515-G5 Modbus RTU - Manual (Page 67)

Error Codes and Troubleshooting 8-3
Modbus Error Codes
If there is an error in the command message, an error code will be returned in the response
message. A fault response message is structured as follows:
Figure 8-1. Fault Response Message
The following table indicates the fault code for the specific type of fault that occurred.
Error Code Name Fault Content
01h Function Error Function Code other than 3, 8, or 10 (hex)
02h Register No. Error Unregistered Register Number
03h No. of Registers Number of registers > 16
21h Data Setting Error Attempted to write beyond register‘s data limits
22h Write-in Error Write function is disabled for specified register
GPD 515 Fault Codes
The GPD 515 drive can have a drive fault, such as undervoltage, overload, external fault, etc.
When a drive failure occurs, it can be classified as an alarm, a minor fault, or a major fault. The
drive reacts differently with each type of failure. An alarm displays a warning indication, however
operation continues. Minor faults allow continued operation, and a contact will close only if one of
the multi-function outputs is set up as a minor fault contact. The major faults cause the motor to
coast to stop, and the fault signal output is present at terminals 18-20.
The GPD 515‘s parameters U2-01 (Current Fault), U2-02 (Last Fault), and U3-01 through
U3-04 (Last Fault; Fault Message 2, 3, & 4) each display a fault code representing the drive
failure. The following table indicates the abbreviation displayed on the Digital Operator and the
hexadecimal code viewed in drive parameters U2-01, U2-02 and U3-01 when a specific drive
failure occurs. The table also indicates whether the drive failure is an A – alarm, m – minor fault,
or M – major fault.
xxh SLAVE ADDRESS
80h + FUNC. CODE xxh
03h
xxh
xxh
CRC-16
UPPER
LOWER
ERROR CODE