User's Manual

Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 1.0.12-Beta7 www.cooperbussmann.com/wirelessresources 81
10020 + Offset
Detected indication for this 115S module
30017 + Offset
Modbus Error Counter for this 115S module
30018 + Offset
Modbus Last Error Code for this 115S module. (Appendix D - Modbus Error
Codes)
30019 + Offset
Modbus Lost Link Counter for this 115S module
30020 + Offset
Module type (0x0301) = 769. / Error Status
40001 - 40008 + Offset
Analog Output 1 8
40009 - 40016 + Offset
Pulsed Output target 1 8 (1 register per pulsed output)
Appendix D - Modbus Error Codes
The following are Modbus Error Response codes that can be read if utilising the Modus mapping fail register and
selecting a General Purpose Analog Register (30501, 40501, etc.) instead of a General Purpose Digital register (10501,
501, etc.)
Dec
Code
Hex
Code
Name
Meaning
65281
FF01
Illegal Function
The function code received in the query is not an allowable action for the
server (or slave). This may be because the function code is only applicable to
newer devices, and was not implemented in the unit selected. It could also
indicate that the server (or slave) is in the wrong state to process a request
of this type.
65282
FF02
Illegal Data
Address
The data address received in the query is not an allowable address for the
server (or slave). More specifically, the combination of reference number and
transfer length is invalid. For a controller with 100 registers, the PDU
addresses the first register as 0, and the last one as 99. If a request is
submitted with a starting register address of 96 with a quantity of 4
registers, then this request will successfully operate on registers 96, 97, 98,
99. If a request is submitted with a starting register address of 96 and a
quantity of registers of 5, then this request will fail with Exception Code 0x02
65283
FF03
Illegal Data Value
A value contained in the query data field is not an allowable value for server
(or slave). This indicates a fault in the structure of the remainder of a
complex request, such as that the implied length is incorrect. It specifically
does NOT mean that a data item submitted for storage in a register has a
value outside the expectation of the application program, since the
MODBUS protocol is unaware of the significance of any particular value of
any particular register.
65384
FF04
Slave Device
Failure
An unrecoverable error occurred while the server (or slave) was attempting
to perform the requested action.
65285
FF05
Acknowledge
Specialized, use in conjunction with programming commands.
The server (or slave) 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 (or master).
65286
FF06
Slave Device
Busy
Specialized, use in conjunction with programming commands.
The server (or slave) is engaged in processing a long duration program