SEW-Eurodrive MOVIPRO Ethernet/IP - Fault Codes (Exception Codes)

9
Modbus protocol (Modbus/TCP)
Fault codes (exception codes)
Manual – MOVIPRO
®
with EtherNet/IP™ or Modbus/TCP Fieldbus Interface
113
• Bit6 (handshake bit)
Is used as acknowledgment bit between client and server. As the MOVILINK
®
parameter channel is transmitted cyclically, the service execution must be
triggered by edge control via the handshake bit. For this purpose, the value of this
bit is toggled for each new service to be executed. The inverter uses the hand-
shake bit to signal whether the service has been executed or not. The service has
been executed if the handshake bit received in the PLC is identical with the sent
handshake bit.
• Bit7 (status bit)
Indicates whether the service was executed properly or whether errors occurred.
INFORMATION
• For the index, subindex, factor etc. of a parameter, refer to the parameter tree in
the MOVITOOLS
®
MotionStudio engineering software.
• Refer to chapter "Parameterizing the power section "PFA-...""(→2156) for a de-
tailed description of the parameters.
9.5 Fault codes (exception codes)
If a fault occurs while processing a "function code", the fault is reported to the Modbus
client in an "exception response".
The following "exception codes" are returned by a unit from SEW‑EURODRIVE:
Exception
code
hex
Designation Meaning
01 ILLEGAL FUNCTION
The slave unit does not support the "function code"
transmitted in the request.
02 ILLEGAL DATA ADDRESS
You have entered an invalid data address for the ac-
cess to the Modbus slave. This can be due to the fol-
lowing reasons:
• Invalid start address when accessing the Modbus
slave registers (does not exist, or "function code"
does not work with this address)
• Invalid combination of start address and length
• No symmetric access with "read/write"
• Wrong object ID (on access via FC43)
03 ILLEGAL DATA VALUE
A part of the data field of the Modbus request contains a
value invalid for the Modbus slave. This can be due to
the following reasons:
• The "word count" contains an invalid value (smaller
than 1 or larger than 125)
• The received PDU length is too short or too long (de-
pending on the specified "word count")
• Internal error when reading or writing the process
data
04 SLAVE DEVICE FAILURE
Error when accessing MOVILINK
®
parameter (e. g. in-
ternal timeout)
06 SLAVE DEVICE BUSY
There is already a controlling connection either via an-
other Modbus controller or another fieldbus system.
0A GATEWAY PATH UNAVAILABLE The data cannot be forwarded to a subsystem.
16998413/EN – 12/2016