ES58 • EM58 MODBUS®
05
ACKNOWLEDGE
Specialized use in conjunction with programming
commands. The server has accepted the request
and is processing it, but a long duration of time
will be required to do so. This response is
returned to prevent a timeout error from
occurring in the client. The client can next issue a
Poll Program Complete message to determine if
processing is completed.
06
SERVER DEVICE BUSY
Specialized use in conjunction with programming
commands. The server is engaged in processing a
long–duration program command. The client
should retransmit the message later when the
server is free.
08
MEMORY PARITY ERROR
Specialized use in conjunction with function
codes 20 and 21 and reference type 6, to indicate
that the extended file area failed to pass a
consistency check. The server attempted to read
record file, but detected a parity error in the
memory. The client can retry the request, but
service may be required on the server device.
0A
GATEWAY PATH
UNAVAILABLE
Specialized use in conjunction with gateways,
indicates that the gateway was unable to
allocate an internal communication path from
the input port to the output port for processing
the request. Usually means that the gateway is
misconfigured or overloaded.
0B
GATEWAY TARGET
DEVICE FAILED TO
RESPOND
Specialized use in conjunction with gateways,
indicates that no response was obtained from
the target device. Usually means that the device
is not present on the network.
For any information on the available exception codes and their meaning refer to
the “MODBUS Exception Responses” section on page 47 of the “MODBUS
Application Protocol Specification V1.1b3” document.
MAN ESx58x_EMx58x MB E 1.3
Programming parameters
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